Arsenic is a semi-metal. In its metallic form it is bright, silver-grey and brittle. Arsenic is a silver-grey brittle, crystalline, metallic-looking substance which exists in three allotropic forms (yellow, black, and grey). Gray Arsenic is the most common. It has a metallic sheen & conducts electricity. Yellow arsenic is metastable, is a poor electrical conductor & does not have a metallic sheen. It is prepared by cooling gray arsenic vapor in liquid air. Black arsenic can be prepared by cooling arsenic vapor at 100 oC – 200 oC. It is glassy, brittle and a poor electrical conductor. Arsenic is soluble in nitric acid, cold hydrochloric & sulfuric acids. Arsenic is insoluble in water and non-oxidizing acids. A small amount of arsenic is found in its native state & the most common arsenic-containing mineral is arsenopyrite. Arsenic is produced as a by-product of copper, gold, Silver & lead refining. It can be obtained from arsenopyrite by heating, causing the arsenic to sublime and leave behind iron(II) sulphide. Atomic number 33 Atomic mass 74.922 Group 15; Period 4; Block P Melting point Sublimes at 616°C, 1141°F, 889 K Boiling point Sublimes at 616°C, 1141°F, 889 K Allotropes Yellow As, Grey As, Black As Arsenic's toxicity is actually beneficial in fighting fungus, bacteria, and insects in wood preservation. Other Mineral contenting Arsenic are Realgar, Orpiment and Enargite. The world's largest producers of arsenic are China, Chile, Mexico, Belgium, Namibia, and the Philippines. Gallium arsenide is a semiconductor used in LEDs. Gallium arsenide is a semiconductor used in Laser diodes. Arsenic compounds are used to make Wood Preservatives. Arsenic is used as a doping agent in semiconductors for solid-state devices. Lead storage batteries used in cars & trucks contain alloys of Lead & Arsenic. Arsenic is also used to alloy Lead Shot & Bullets. Arsenic is used in lead alloys for lead shot and bullets. Arsenic is used as a pigment in Weed killers. Arsenic is used in fireworks & pyrotechnics to give additional color to the flame. Arsenic compound is used to make Pesticides. Arsenic is used as a pigment in manufacturing of paper. Arsenic-containing pesticides used in Tobacco farming. Arsenic is found in Tobacco smoke. Arsenic is used as a doping agent in microchip manufacturing industry. Arsenic is used to treat an uncommon blood cancer known as acute promyelocytic leukemia. Arsenic compound is used to make Signal Lights. Used as a pigment in textiles. Arsenic compound is used to make Poisons.
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Giant Mine sits near Yellowknife, in the Northwest Territories of Canada. Once it was a productive gold mine, but after the gold ran out, the mining company went bankrupt and left the government to clean up the mess: enough arsenic trioxide dust to kill everyone on Earth. The solution: freezing it, at least for now. Thanks to all the team at the Giant Mine Remediation Project! More about them: http://www.aadnc-aandc.gc.ca/eng/1100100027364/1100100027365 The history of Giant Mine and the local First Nation people, a story I'm not qualified to tell: http://www.cbc.ca/news/canada/north/canada-150-betsina-family-nwt-1.4180681 Edited by Michelle Martin (@mrsmmartin) I'm at http://tomscott.com on Twitter at http://twitter.com/tomscott on Facebook at http://facebook.com/tomscott and on Snapchat and Instagram as tomscottgo
Views: 437133 Tom Scott
How Algae Could Change The Fossil Fuel Industry https://www.youtube.com/watch?v=yCNkmi7VE0I » Subscribe to NowThis World: http://go.nowth.is/World_Subscribe Gold has been a valuable commodity for centuries, but the process to obtain it has dangerous costs. So what is true price of gold? Learn More: National Geographic: The Real Price of Gold http://ngm.nationalgeographic.com/2009/01/gold/larmer-text/3 Business Insider: The Cost Of Mining An Ounce Of Gold http://www.businessinsider.com/the-cost-of-mining-gold-2013-6 Al Jazeera: The true price of gold http://america.aljazeera.com/watch/shows/techknow/articles/2015/6/4/the-true-price-of-gold.html More from NowThis: » Subscribe to NowThis News: http://go.nowth.is/News_Subscribe NowThis World is dedicated to bringing you topical explainers about the world around you. Each week we’ll be exploring current stories in international news, by examining the facts, providing historical context, and outlining the key players involved. We’ll also highlight powerful countries, ideologies, influential leaders, and ongoing global conflicts that are shaping the current landscape of the international community across the globe today. Like NowThis World on Facebook: https://go.nowth.is/World_Facebook Connect with Judah: Follow @judah_robinson on Twitter – Facebook: http://go.nowth.is/LikeJudah Connect with Versha: Follow @versharma on Twitter – Facebook: http://go.nowth.is/LikeVersha http://www.youtube.com/nowthisworld
Views: 142820 NowThis World
1. Cinnabar : Cinnabar (mercury sulfide) is the single most toxic mineral to handle on Earth. The name of the crystal means dragons blood, and it is the main ore of mercury. Forming near volcanos and sulfur deposits, the bright red crystals signal danger of the worst kind. Cinnabar may release pure mercury if disturbed or heated, causing tremors, loss of sensation and death. In the Middle Ages and late 1700s, being sent to work in Spanish mines containing cinnabar formations was widely considered a death sentence. Cinnabar was widely used in Chinese history for ornamental food dishes, and intricate carvings were created from chunks of it, sometimes at the expense of the artisans. Even more incredibly, some ancient medical practitioners believed cinnabar held healing powers, and prescribed it for certain conditions. 2. Orpiment : The only thing worse than arsenic itself could be a rock made from arsenic and sulfur. The lethal and chemically reactive orpiment crystals are found growing below the surface in mineral formations, often near hydrothermal vents. The colors are seductive, but holding the crystals in your hands may release carcinogenic, neurotoxic arsenic powder. Like cinnabar, the Chinese made extensive use of this mineral, but to far more terrifying ends. Arrows would be rubbed on crushed samples of these stones and then launched to poison the enemy in a rather fancy way to throw a rock. Orpiment is known to give off a strong garlic smell due to its arsenic content, and may crumble into dangerous powder when exposed to light. The mineral was used as a primary component of ochre paint, and likely poisoned many of the artists who used it. 3. Stibnite : Stibnite is antimony sulfide, but it looks like silver. For that reason, the huge, shining metallic crystals of this unstable compound were once fashioned into magnificent eating utensils. But the sword shaped crystals bore the powers of death to those who used them. Stibnite’s antimony laced crystals killed a number of people before it became known that use of the mineral was causing food poisoning of the worst kind. Even in collections, stibnite samples should be handled with great caution to avoid poisoning. Hand washing is advisable after any contact. Mines near Oksaku in Japan have produced the best stibnite crystals in the world, measuring up to a foot in length. Many stibnite samples have the appearance of a miniature steeple. 4.Torbernite : Torbernite is the mineral from hell. The prism shaped green crystals form as secondary deposits in granitic rocks, and are composed of uranium. Formed through a complex reaction between phosphorous, copper, water and uranium, the stunning crystal displays have seduced many mineral collectors into taking a sample for a shelf collection. If the uranium decay from a pocket sized Chernobyl were not enough, lethal radon gas capable of causing lung cancer slowly releases from these hot rocks. This is one crystal to leave alone. Torbernite can occur in granite, so your stone countertop just might contain traces of torbernite. The bright green crystal blooms were used by prospectors as indicators of uranium deposits. 5. Arsenopyrite : Arsenopyrite is fool’s gold, but with a difference. One would not just be a fool to mistake it for gold. Equally foolish would be a decision to pick up this mineral on a hike at a quarry, and proceed to use your hands to put trail mix in your mouth. Arsenopyrite is arsenic iron sulfide, which is the same type of mineral as pyrite (fool’s gold, iron sulfide), but with a heavy addition of arsenic. If one attempts to heat or in any way alter the mineral, a strong garlic odor of arsenic will be produced as lethally toxic, corrosive and carcinogenic vapors are released. Just handling the mineral brings one into contact with unstable sulfuric arsenic salts. Interestingly, arsenopyrite may be identified by striking a specimen with a hammer. The powerful garlic odor of arsenic can be briefly detected as the sparks fly.
Views: 2790 Boogie Hero
Módulo 6: Metals and metalloids of groups 15 and 16 Unidad 6.2. Arsenic, antimony and bismuth Uses and applications of arsenic, antimony and bismuth MOOC: Metal and Metalloids of the Main Groups: Basis and Their Role in the Daily Life (URJCx105) URJCx: Open to knowledge URJCx: Abiertos al conocimiento www.urjcx.urjc.es www.online.urjc.es www.urjc.es
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Patreon: https://www.patreon.com/Thoisoi?ty=h Facebook: https://www.facebook.com/thoisoi2 Instagram: https://www.instagram.com/thoisoi/ Do not repeat the experiments shown in this video! In this video I would like to tell you about such an unusual element as antimony. This element belongs to group 15 and to the so-called semimetal series of the periodic table. From a chemistry point of view antimony is rather a metal. It means that it easily oxidizes or in other words it gives its electrons and it even looks like metal. Metallic antimony is silvery and can easily be confused with bismuth. However, in contrast to other metals that are good heat and electricity conductors, antimony doesn’t provide electricity well. Because of such a property it was added on to nonmetals. Even scientists still can’t decide if antimony is a metal or not. Nevertheless, antimony as an element shouldn’t be confused with stibnite that is its natural mineral - antimony trisulfide. Since ancient times women have used stibnite in powdered form to darken their eyebrows and eyelashes. Because of that, nowadays, the word stibnite is often associated with cosmetics. Of course nowadays antimony trisulfide is rarely used because its compounds are toxic to people. For instance now antimony trisulfide is used to make watch heads. It is stibnite that antimony is extracted from by melting of the mineral with further reduction of the oxide to the elementary antimony.
Views: 134527 Thoisoi2 - Chemical Experiments!
Antimony is a chemical element with symbol Sb and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. It is sometimes found free in nature, but is usually obtained from the ores stibnite (Sb2S3) and valentinite (Sb2O3). Nicolas Lémery, a French chemist, was the first person to scientifically study antimony and its compounds. Antimony alloys are also used in batteries, low friction metals, type metal and cable sheathing, among other products. Antimony compounds are used to make flame-proofing materials, paints, ceramic enamels, glass and pottery. The ancient Egyptians used antimony, in the form of stibnite, for black eye make-up. Atomic number 51 Atomic mass 121.760 Group 15 Period 5 Block p Melting point 630.628°C, 1167.13°F, 903.778 K Boiling point 1587°C, 2889°F, 1860 K Allotropes White Sb, Yellow Sb, Black Sb Antimony is a semi-metal. In its metallic form it is silvery, hard and brittle. Antimony is a moderately active element. It does not combine with oxygen in the air at room temperature. Antimony is a poor conductor of heat and electricity, it is stable in dry air and not attacked by dilute acids or alkalis. Antimony is found in the Earth's crust at about 0.2 to 0.5 parts per million. Most common minerals of antimony are stibnite, tetrahedrite, bournonite, boulangerite, and jamesonite. Antimony is extracted by roasting the antimony(III) sulfide to the oxide, and then reducing with carbon. Ancient Egyptians used antimony, in the form of stibnite, for black eye make-up. Antimony is used in the semiconductor industry as an n-type dopant for silicon. Antimony alloys are also used in batteries.Antimony(III) sulfide is used in the heads of some safety matches. Lead-antimony alloys are used for covering electrical cables. Antimony sulfides help to stabilize the friction coefficient in automotive brake pad materials. Used as a fining agent to remove microscopic bubbles while making TV screens. Lead-antimony alloys are used for fishing tackle. Antimony compounds are used to make flame retardant paints. Antimony compounds are used to make ceramic. Lead-antimony alloys are used in Tracer bullets. Antimony is used as a catalyst in the production of plastics. Antimony is used to make Pocket Calculators.
Views: 2776 Top Most 22
Most people have heard of arsenic due to its potential use as a poison and some have even suggested exposure to arsenic was the cause of Napoleon Bonaparte's death. Arsenic is a naturally occurring element that is widely distributed in the earth's crust and people can be exposed to it through air, water and food. Arsenic combines with other elements such as oxygen, chlorine and sulfur to form inorganic arsenic compounds. Exposure to higher-than-average levels of arsenic occurs mainly in workplaces, near hazardous waste sites and areas with high levels naturally occurring in soil, rocks and water. Arsenic can enter drinking water supplies from natural deposits in the earth or from agricultural and industrial practices. A large percentage of industrial arsenic in the U.S. has come from its use as a wood preservative, but arsenic has also been used in paints, dyes, metals, drugs, soaps and semi-conductors. Agricultural applications, mining and smelting can all contribute to arsenic releases into the environment. Inorganic arsenic exposure of humans, by the inhalation route, has been shown to be strongly associated with lung cancer, while ingestion of inorganic arsenic by humans has been linked to a form of skin cancer and also to bladder, liver and lung cancer. At high levels, inorganic arsenic can cause death. Exposure to lower levels for a long period of time can cause a discoloration of the skin and the appearance of small corns or warts. The EPA has classified inorganic arsenic as a human carcinogen and has set limits on the amount of arsenic that industrial sources can release into the environment. There are also permissible exposure limits for workers.
Views: 2297 Paul Cochrane
https://www.facebook.com/msscrecords/ Tracklist: Funkin Matt - Elephant Funkin Matt - Flux Steve Aoki - Get Me Outta Here (Funkin Matt Remix) Tiga vs Boys Noise -100 Duko - Keep My Bassbass Die Antwoord – Freeky (Habstrakt & Badjokes Bootleg) Sartex - Back To The Future Maiki Vanicks - Need It Mike Williams - Konnichiwa Chuckie - Future Shiba San - Okay (Big Room Edit) Did you know? The chemical element arsenic is classed as a metalloid. It has been known since ancient times. Its discoverer and discovery date are unknown. 5 fun facts about Arsenic: 1. The atomic number of arsenic in the Periodic Table is 33 and is represented as ‘As 2. Due to its high level of toxicity, arsenic has been named as the ‘Kings of Poison’. Hence, for the same reason, it is used as a wood preservative against insects, bacteria and fungi. It also finds its use in making insecticides, poison, weed killers, etc. 3. In the 18th, 19th and 20th century, arsenic was used in the form of medicines, two most common being arsphenamine and arsenic trioxide. While the former medication was prescribed for syphilis and trypanosomiasis, the latter one was useful in treating cancer. 4. Some of the side effects of arsenic include agitation, constipation, darkening of skin, drowsiness, earache, poor appetite, increased sweating, mouth sores, fatigue, weight loss, nausea, nose bleeding, vomiting, depression, seizures, tremors, dry eyes, allergic reactions, sudden weight gain, wheezing, irregular pulse and increased thirst. 5. The top producers of arsenic are China, Peru, Chile and Morocco. While the production from Peru comes from copper mining, production in China comes from mining of gold.
Views: 23 MSSC Records
Any further queries please feel free to contact me at: Email：[email protected] WhatsApp:+86 18037167566 website：http://www.frmining.com,http://www.frjig.com ,http://www.frjigmachine.com Gravity separation can be used for most of antimony ore with its bigger density than other material and coarse inlay. No matter antimony oxide or antimony sulfide or mixture of antimony oxide and sulfide, gravity separation can do a great job to get high grade antimony concentrate, especially for antimony oxide which floatation separation can not work.
Views: 1677 Kevin Zhao
Elite: Dangerous How to Find Arsenic in Game Link: https://youtu.be/WPIN-YH0Z4A Collected on planet surfaces and from asteroids. Elite Dangerous Material Hunter Arsenic Arsenic, As, atomic number 33. Melting point 887K. Used in Medicines pesticides and herbicides optoelectronic compounds and for strengthening alloys Arsenic is a Raw Material. It was introduced in v2.0. Known Sources of Arsenic in Elite Dangerous: Surface Prospecting: Outcrop Bronzite Chondrite Mesosiderite Metallic Meteorite Asteroid Mining Mission reward Where to find Arsenic in Elite dangerous : Outcrop Bronzite Chondrite Mesosiderite Metallic Meteorite Asteroid Mining Mission reward Explosives Munitions What to do with Arsenic in Elite Dangerous FSD Injection Large Calibre Munitions Fast Scan Detailed Surface Scanner Fast Scan Scanner Increased Range Frame Shift Drive Reinforced Shield Generator Join the discussion on Discord https://discord.gg/HRCmDB4 WAYS TO SUPPORT THE CHANNEL ✔️LIKE THE VIDEO ✔️SUBSCRIBE TO THE CHANNEL ✔️WATCHING THE STREAM 💰 Get Elite dangerous for £19.99 https://click.linksynergy.com/fs-bin/click?id=/xxfns2/XC4&offerid=577354.60&type=3&subid=0 Music: http://www.purple-planet.com https://soundcloud.com/migueljohnsonm... Elite: Dangerous or Elite 4 is a space adventure, trading, and combat simulation video game developed and published by Frontier Developments played on PC, Mac and Xbox one and is the fourth release in the Elite video game series Piloting a spaceship, the player explores a realistic 1:1 scale open world galaxy based on the real Milky Way, with the gameplay being open-ended. The game is the first in the series to attempt to feature massively multiplayer gameplay, with players' actions affecting the narrative story of the game's persistent universe, while also retaining single player options. It is the sequel to Frontier: First Encounters, the third game in the Elite series, released in 1995. Re-conceptualized by David Braben. Starting a few years back as the Elite dangerous Kickstarter campaign a strong community has now grown around the Elite universe. elite dangerous thargoids sci-fi preview 2.4. check out the hotfixes that predate Elite: Dangerous Tags: #elitedangerous #howtofindarsenic #elitedangerousguide
Views: 2821 Ricardo's Gaming
STR TV: क्या होगा यदि आप पारे को पिटे हो।?what would happen if you drink liquid mercury? -------------------------------------------------------------------------------------------------------- Subscribe To ► https://www..com/c/StrTv313 STR Tv Facebook page. ► https://www.fb.me/strtv Blog ► https://strtv313.blogspot.in/ Twitter ► https://twitter.com/tabishraza313 Instagram►https://www.instagram.com/tabish_str/ ----------------------------------------------------------------------------------------------------------- Music: Hypnothis by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100634 Artist: http://incompetech.com/ ----------------------------------------------------------------------------------------------------------- tags: ماذا سيحدث إذا كنت تشرب الزئبق السائل؟ QU'EST-CE QUI RESULTE SI VOUS AVEZ BÉLANGÉ DE MERCURE LIQUIDE? COSA SAREBBE RISPONDE SE LE MANGIA MERCURIA LIQUIDA? あなたが水分を飲んでいたらどうなるでしょうか？ 액체 수분을 섭취한다면 어떻게 될까요? Quid fiet ab ipsis bibistis MERCURIUS HUMIDUS? ЧТО ПРОИСХОДИТ, ЕСЛИ ВЫ НАПРАВЛЯЕТ ЖИДКОЕ МЕРКУРИЙ? ¿QUÉ PASARÍA SI USTED BEBE MERCURIO LÍQUIDO? ----------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------- Disclaimer- Some contents are used for the educational purpose of fair use. Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use. ----------------------------------------------------------------------------------------------------- Do Not Forget To Subscribe Our Channel THANK YOU
Views: 276320 STR Tv
Realgar, also known as ruby sulphur, is a reddish-orange mineral that is used to create pesticide. However, the mineral's high arsenic content can also lead to severe water and soil contamination. In Shimen County of C China's Hunan Province,more than 400 of them have died from cancers aroused by arsenic poisoning since 1951 and more are still waiting for death.
Views: 303 New China TV
Support this channel: https://www.patreon.com/jeffquitney more at http://scitech.quickfound.net/geology_news_and_links.html "Portrays mining operations in the lead belt of southeast Missouri--the crushing of ore, smelting, refining and other steps in the production of pig lead." Originally a public domain film from the US National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original). https://en.wikipedia.org/wiki/Lead Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/ Lead has been commonly used for thousands of years because it is widespread, easy to extract and easy to work with. It is highly malleable as well as easy to smelt. Metallic lead beads dating back to 6400 BCE have been found in Çatalhöyük in modern-day Turkey. In the early Bronze Age, lead was used with antimony and arsenic. The largest preindustrial producer of lead was the Roman economy, with an estimated annual output of 80,000 tonnes, which was typically won as a by-product of extensive silver smelting. Roman mining activities occurred in Central Europe, Roman Britain, the Balkans, Greece, Asia Minor and Hispania which alone accounted for 40% of world production. Roman lead pipes often bore the insignia of Roman emperors (see Roman lead pipe inscriptions). Lead plumbing in the Latin West may have been continued beyond the age of Theoderic the Great into the medieval period. Many Roman "pigs" (ingots) of lead figure in Derbyshire lead mining history and in the history of the industry in other English centers. The Romans also used lead in molten form to secure iron pins that held together large limestone blocks in certain monumental buildings. In alchemy, lead was thought to be the oldest metal and was associated with the planet Saturn. Alchemists accordingly used Saturn's symbol (the scythe, ♄) to refer to lead. Up to the 17th century, tin was often not distinguished from lead: lead was called plumbum nigrum (literally, "black lead"), while tin was called plumbum candidum (literally, "bright lead")... Most ores contain less than 10% lead, and ores containing as little as 3% lead can be economically exploited. Ores are crushed and concentrated by froth flotation typically to 70% or more. Sulfide ores are roasted, producing primarily lead oxide and a mixture of sulfates and silicates of lead and other metals contained in the ore. Lead oxide from the roasting process is reduced in a coke-fired blast furnace to the metal. Additional layers separate in the process and float to the top of the metallic lead. These are slag (silicates containing 1.5% lead), matte (sulfides containing 15% lead), and speiss (arsenides of iron and copper). These wastes contain concentrations of copper, zinc, cadmium, and bismuth that can be recovered economically, as can their content of unreduced lead. Metallic lead that results from the roasting and blast furnace processes still contains significant contaminants of arsenic, antimony, bismuth, zinc, copper, silver, and gold. The melt is treated in a reverberatory furnace with air, steam, and sulfur, which oxidizes the contaminants except silver, gold, and bismuth. The oxidized contaminants are removed by drossing, where they float to the top and are skimmed off. Since lead ores contain significant concentrations of silver, the smelted metal also is commonly contaminated with silver. Metallic silver as well as gold is removed and recovered economically by means of the Parkes process. Desilvered lead is freed of bismuth according to the Betterton-Kroll process by treating it with metallic calcium and magnesium, which forms a bismuth dross that can be skimmed off. Very pure lead can be obtained by processing smelted lead electrolytically by means of the Betts process. The process uses anodes of impure lead and cathodes of pure lead in an electrolyte of silica fluoride...
Views: 17087 Jeff Quitney
Support this channel: https://www.patreon.com/jeffquitney more at http://scitech.quickfound.net/geology_news_and_links.html "Tells the story of the mining and manufacture of copper from the crude ore to the finished product. lots of footage of giant machines, some blasting." Originally a public domain film, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original). https://en.wikipedia.org/wiki/Copper_extraction_techniques Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/ Copper extraction techniques refers to the methods for obtaining copper from its ores. The conversion of copper consists of a series of chemical, physical, and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors. As in all mining operations, the ore must usually be beneficiated (concentrated). To do this, the ore is crushed. Then it must be roasted to convert sulfides to oxides, which are smelted to produce matte. Finally, it undergoes various refining processes, the final one being electrolysis. For economic and environmental reasons, many of the byproducts of extraction are reclaimed. Sulfur dioxide gas, for example, is captured and turned into sulfuric acid — which is then used in the extraction process... History The earliest evidence of cold-hammering of native copper comes from the excavation at Çaÿonü Tepesi in eastern Anatolia. The radiocarbon date is 7250 ± 250 BCE. Among the various items considered to be votive or amulets there was one that looked like a fishhook and one like an awl. An archaeological site in southeastern Europe (Serbia) contains the oldest securely dated evidence of copper making at high temperature, from 7,000 years ago. The find in June 2010 extends the known record of copper smelting by about 500 years, and suggests that copper smelting may have been invented in separate parts of Asia and Europe at that time rather than spreading from a single source. Copper smelting technology gave rise to the Copper Age and then the Bronze Age. Concentration Most copper ores contain only a small percentage of copper metal bound up within valuable ore minerals, with the remainder of the ore being unwanted rock or gangue minerals, typically silicate minerals or oxide minerals for which there is often no value. The average grade of copper ores in the 21st century is below 0.6% copper, with a proportion of economic ore minerals (including copper) being less than 2% of the total volume of the ore rock. A key objective in the metallurgical treatment of any ore is the separation of ore minerals from gangue minerals within the rock. The first stage of any process within a metallurgical treatment circuit is accurate grinding or comminution, where the rock is crushed to produce small particles... Subsequent steps depend on the nature of the ore containing the copper. For oxide ores, a hydrometallurgical liberation process is normally undertaken, which uses the soluble nature of the ore minerals to the advantage of the metallurgical treatment plant. For sulfide ores, both secondary (supergene) and primary (hypogene), froth flotation is used to physically separate ore from gangue. For special native copper bearing ore bodies or sections of ore bodies rich in supergene native copper, this mineral can be recovered by a simple gravity circuit... Until the latter half of the 20th century, smelting sulfide ores was almost the sole means of producing copper metal from mined ores (primary copper production)... The copper is refined by electrolysis. The anodes cast from processed blister copper are placed into an aqueous solution of 3–4% copper sulfate and 10–16% sulfuric acid. Cathodes are thin rolled sheets of highly pure copper or, more commonly these days, reusable stainless steel starting sheets (as in the IsaKidd process). A potential of only 0.2–0.4 volts is required for the process to commence. At the anode, copper and less noble metals dissolve. More noble metals such as silver, gold, selenium, and tellurium settle to the bottom of the cell as anode slime, which forms a salable byproduct. Copper(II) ions migrate through the electrolyte to the cathode. At the cathode, copper metal plates out, but less noble constituents such as arsenic and zinc remain in solution unless a higher voltage is used. The reactions are: At the anode: Cu(s) → Cu2+(aq) + 2e− At the cathode: Cu2+(aq) + 2e− → Cu(s)...
Views: 81668 Jeff Quitney
Just like in Mesopotamia and Egypt the people of Mesoamerica were skilled miners and metallurgists. The skill of mining and refining metals overlaps with chemistry and stone working. Some anthropologists and historians do say things that match a certain set of narratives however the mainstream historical establishment is not in agreement on this viewpoint. Indeed "mainstream establishment history" is something that only dominates the made for general consumption documentaries of the History Channel, National Geographic and short articles in the mainstream media. I used to buy the line being peddled because I assumed the dominant alternative "researchers" had done the research given that they had been at it for decades. Luckily we live in the information age with so many libraries at our fingertips that we don't have to rely on "gatekeepers' from either the mainstream or alternative, AND THERE BE GATEKEEPERS ON BOTH SIDES!! The Mohs Hardness Scale fallacy of copper tools https://www.youtube.com/watch?v=nEXvT_EETYM Technologies of Ancient Mesoamerica https://link.springer.com/article/10.1007/s11837-999-0034-6 Copper Sources, Metal Production, and Metals Trade in Late Postclassic Mesoamerica extract https://www.jstor.org/stable/2891092?seq=1#page_scan_tab_contents https://www.tandfonline.com/doi/abs/10.1179/009346996791973774 Arsenic Bronze: Dirty Copper or Chosen Alloy? A View from the Americas by Heather Lechtman (Only a preview is available from this link but pieces of this and realted artciles can be found with keywords such as author and title) _FROM ARSENICAL TO TIN_BIZMUTH BRONZE "Archaeologists and historians of metallurgy have attempted to explain the gradual abandonment of arsenic bronze in favor of tin bronze in the ancient Old world by making comparisons between the mechanical properties of the two bronzes. These comparisons purport to show the superiority of copper-tin alloys over alloys of copper and arsenic, despite an absence of data on the physical properties of the copper-arsenic system. The study reported here presents the results of mechanical tests carried out on experimental samples of both types of bronze over a broad range of alloy compositions. Hardness, tensile strength, and elongation determinations were made on cold worked and hot worked (forged) material. Whereas tin bronzes can be work hardened more extensively than arsenic bronzes, the far greater ductility of arsenic bronze makes it a desirable alloy for the manufacture of thin metal sheet. The widespread use of low-arsenic copper-arsenic alloys in the Americas, especially in the Andean culture area, is attributable in part to the tradition there of sheet metal production in the elaboration of three-dimensional forms." Search term: "University Press of Colorado - Archaeometallurgy in Mesoamerica" for the featured paper. Google Scholar will also provide no shortage of papers on Mesoamerican metallurgy Tumbaga https://en.wikipedia.org/wiki/Tumbaga The use of acid in metallurgy has profound implications for not just metals but wider chemistry and even sone working, sedimentary rock such as limestone is especially vulnerable to acid damage or intentional usage. Axe monies https://en.wikipedia.org/wiki/Axe-monies The Wikipedia articles provide references to more detailed information. Arsenical copper and bronze are important details in understanding Mesoamerican tools and trade links https://en.wikipedia.org/wiki/Arsenical_bronze
Views: 287 SGD Sacred Geometry Decoded
Learn which are the uses, environmental effects and health effects of cadmium. Cadmium (Cd) is emitted to water, soil, and air by fossil fuel combustion, non-ferrous metal refining and mining, application, and manufacture of phosphate fertilizers, waste disposal and incineration. It is not usually present in the environment as a pure metal, however, it is most often found in lead, zinc, and copper ores. Uses of cadmium Much of the cadmium that enters the physical body by ingestion comes from terrestrial foods. The daily intake of this metal through food varies by geographic region. Adverse health effects of cadmium This toxic metal is of no use to the human body and is toxic even at very low levels. Once absorbed this metal is efficiently retained in the human body, in which it accumulates throughout life. Occupational exposure to cadmium can lead to numerous adverse health effects including cancer. Kidney stones are also common in cadmium-exposed populations, particularly in exposed workers. Chronic cadmium exposure is strongly connected with progressive renal tubular dysfunction. Urinary, it has been used as a biomarker to indicate ongoing and chronic exposure level in general population. The latest studies confirm that this metal is associated with human pancreatic cancer. Moreover, it increases lipid peroxidation and additionally depletes glutathione and some antioxidants. It also promotes the production of inflammatory cytokines. According to some studies in animals, younger animals absorb more Cd than adults. Environmental effects of cadmium This metal strongly adsorbs to organic matter in soils. Once on the ground, it moves very easily through soil layers and is taken up into the food chain by uptake by plants such as root crops, leafy vegetables, cereals, and legumes. A plant-based diet can considerably reduce the amount of this metal taken into the body from food. Some studies suggest that more Cd is absorbed into the physical body if the diet is high in aft and low in protein, calcium, or iron. Reference http://www.yourhealthremedy.com/harmful-compounds/cadmium-definition-poisoning-and-toxicity/ Images – pixabay Music: http://www.bensound.com
Views: 2172 Your Health Remedy
In this video I crush apples seeds with my hydraulic press in order to see if there is really cyanide in them. In a previous video I crushed apples to make apple juice in my hydraulic press and some people commented that I should be careful because there is cyanide in apple juice. So I wanted to test if that was really the case. So I bought a cyanide test kit and crushed some apple seeds in my hydraulic press. Then I mixed it with some water and used the test kit on it. The results were unsettling! Cyanide causes your cells to be unable to use oxygen due to disruption of the electron transport chain. Send me things to crush at: PO Box 482 North Plains OR 97133 *If you do send me something message me so I know it's coming! Checkout my science channel: https://www.youtube.com/channel/UCA19mAJURyYHbJzhfpqhpCA https://youtu.be/CE0860nIIjE For more awesome crushing videos checkout: Large Steel Jingle Bells Crushed With A Hydraulic Press https://youtu.be/ru7UMa2E5pg How Strong Is Human Hair Composite When Crushed In A Hydraulic Press? https://youtu.be/JVSyKRYDTsA Starburst Crushed And Folded With Hydraulic Press Into 64 layers https://youtu.be/yk4WKsgvRc8 Did I Just Make Apple Juice With A Hydraulic Press? https://youtu.be/5sUMJ7DDOBk Final Scene of Terminator 1 Crushed By Hydraulic Press https://youtu.be/CE0860nIIjE Frozen Oobleck Crushed In Hydraulic Press | Non Newtonian Fluid https://youtu.be/6OmEFB8ajw0 Freeze-Dried Astronaut Ice Cream Crushed In Hydraulic Press https://youtu.be/aMA6lRnwQj0 Ballistic Gel Crushed By Hydraulic Press And Exploded By Bomb https://youtu.be/30ZKvr8J4DU Crushing A Head With Real Human Hair In Hydraulic Press https://youtu.be/C0Kw9ZME3Ws Crushing Cryogenic Frozen Honey With Hydraulic Press! https://youtu.be/8s9ou7inWtQ Giant Hershey's Kiss Crushed By Hydraulic Press https://youtu.be/tjCoSFK56_0 Superglued Legos Crushed By A Hydraulic Press https://youtu.be/gdptsvZ4b8c Stress Ball Crushed With A Hydraulic Press https://youtu.be/kU6bPjLYuCU Crushing Diamagnetic Bismuth With Hydraulic Press https://youtu.be/vbvcDCSAAG4 Tough Elk Antler Crushed With Hydraulic Press https://youtu.be/Mj8QXbyCMt0 Toilet Paper Pykrete Crushed By Hydraulic Press https://youtu.be/8geXJC11PdI Can I Turn Graphite To Real Diamond With Hydraulic Press? https://youtu.be/JE_xrzHwLNo Prank Exploding Golf Ball Turns To Powder In Hydraulic Press https://youtu.be/hjeSLkJAcVU Peanuts Turned To Peanut Butter By Hydraulic Press https://youtu.be/LBGLsMv97Ws Welded Kevlar Crushed By Hydraulic Press https://youtu.be/oIIDOwMpjUM Carbon Composite Fiber Tubes Crushed In Hydraulic Press https://youtu.be/MrKn8J8naEE Exploding Balls Compilation | Obsidian | Fushigi | Jaw Breaker | Emoji |Crushed By Hydraulic Press https://youtu.be/1l97zk9bkTI Sub-Zero Thor's Hammer Crushed By Hydraulic Press https://youtu.be/NX4MIczTEJA Flammable Magnesium Bar Crushed In Hydraulic Press | Bright White Magnesium Fire! https://youtu.be/hZpyeFnDnfE Pokeball And Real 3,000 Volt Pikachu Pokemon Crushed By Hydraulic Press https://youtu.be/x8tZ4mNiY_8 Frozen Pumpkins Crushed By Hydraulic Press | Scary Halloween Edition https://youtu.be/BIbn82MGK94 Giant Molten Jaw Breakers Crushed With Hydraulic Press https://youtu.be/Kezyx-Vd96g Bottle Of Oobleck Crushed By Hydraulic Press | Non-Newtonian Fluid https://youtu.be/LyuvTqY2fk0 Nitinol Shape Memory Alloy Crushed By Hydraulic Press https://youtu.be/YuV4oZHX8Es Obsidian Crystal Ball Crushed By Hydraulic Press | I Cut My Finger https://youtu.be/QB864t4Q5fU Real Venomous Giant Scorpion Crushed By Hydraulic Press https://youtu.be/uD9Iw6iwya0 Water Turned To Wine With Hydraulic Press https://youtu.be/-wnh0vgHqII Real Pearls Crushed To Dust In Hydraulic Press https://youtu.be/rL0D297fKlI Toilet Paper Turned To Solid Stone In Hydraulic Press With Fan Suggestions https://youtu.be/Y0FSXcBeOs0 Orbeez Balls Extruded With Hydraulic Press https://youtu.be/DW_sLaA0nDw Real Bone Crushed By Hydraulic Press https://youtu.be/6nMoYbiNSh4 Emojis Frozen And Wet Crushed By Hydraulic Press https://youtu.be/Sg-YoaR2yH8 Lava Bubbles Turned to Crystals In Hydraulic Press https://youtu.be/N_87bRan1wQ Flux Capacitor Crushed By Hydraulic Press https://youtu.be/ynq5E9N32CI Fushigi Ball Explodes In Hydraulic Press https://youtu.be/59TGM4sksC8 Welded Sand Crushed By Hydraulic Press https://youtu.be/RWrY4Cj-3CY FiberFix Fiberglass Repaired Pipe Crushed By Hydraulic Press https://youtu.be/cPHrwLZVSpE Magnets And Ferrofluid Crushed By Hydraulic Press https://youtu.be/3PpKKDw_lIk Giant Gummy Bear Crushed By Hydraulic Press Turns Into Glue! https://youtu.be/u9jzJCzD6Kc Gallium Metal Crushed By Hydraulic Press Becomes Liquid Metal https://youtu.be/w3FSVwI9wvI
Views: 2339185 The Action Lab
10 Most Dangerous Minerals You Should Not Try! ------------------------------------------------------------------------------------------------------------ Facebook Page:- MESSEGE ME https://www.facebook.com/top10informationssss/?fref=ts ------------------------------------------------------------------------------------------------------------ Videos from Creative Commons https://creativecommons.org/ ----------------------------------------------------------------------------------------------------------- 10 Pyrite https://en.wikipedia.org/wiki/Pyrite https://www.energymuse.com/pyrite-meaning https://www.crystalvaults.com/crystal-encyclopedia/pyrite 9 Feldspar https://en.wikipedia.org/wiki/Feldspar https://geology.com/minerals/feldspar.shtml https://mineralseducationcoalition.org/minerals-database/feldspar/ 8 Hydroxyapatite https://en.wikipedia.org/wiki/Hydroxylapatite https://www.fluidinova.com/hydroxyapatite-properties-uses-and-applications https://www.sciencedirect.com/science/article/pii/S0010854517301601 7 Galena https://en.wikipedia.org/wiki/Galena https://geology.com/minerals/galena.shtml https://www.minerals.net/mineral/galena.aspx 6 Fluorspar https://en.wikipedia.org/wiki/Fluorite https://www.reade.com/products/fluorspar-calcium-fluoride-powder-caf2 https://www.masangroup.com/masanresources/commodities/fluorspar-highlights 5 Quartz https://en.wikipedia.org/wiki/Quartz https://www.minerals.net/mineral/quartz.aspx 4 Cinnabar https://en.wikipedia.org/wiki/Cinnabar https://www.mindat.org/min-1052.html 3 Phenacite https://en.wikipedia.org/wiki/Phenakite https://www.healing-crystals-for-you.com/phenacite.html https://meanings.crystalsandjewelry.com/phenacite/ 2 Erionite https://en.wikipedia.org/wiki/Erionite https://www.cancer.gov/about-cancer/causes-prevention/risk/substances/erionite https://www.ncbi.nlm.nih.gov/books/NBK304368/ 1 Crocidolite https://www.ncbi.nlm.nih.gov/books/NBK304374/ https://en.wikipedia.org/wiki/Riebeckite https://www.sandatlas.org/crocidolite/ ------------------------------------------------------------------------------------------------------------ Music Credit Marvel Style / Cinematic Music / Royalty Free https://www.youtube.com/watch?v=EtdiTrD6YKE The Avengers Theme Song Different Remake https://www.youtube.com/watch?v=hDGbRuLjhOw Batman Vs Superman Remake / Royalty Free https://www.youtube.com/watch?v=CJIxYc2bvIc Erang - Forever Lost In An Endless Dream https://erang.bandcamp.com/track/forever-lost-in-an-endless-dream Erang - Forever Lost In An Endless Dream https://erang.bandcamp.com/track/forever-lost-in-an-endless-dream Bensound - Deep Blue https://www.bensound.com/royalty-free-music/track/deep-blue Doug Maxwell - Space Chatter https://www.youtube.com/audiolibrary/music izioq - First Day at School https://izioq.bandcamp.com/track/first-day-at-school Chris Zabriskie - What Does Anybody Know About Anything https://soundcloud.com/chriszabriskie/what-does-anybody-know-about-anything
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Abandoned Mine Acid Water TurboCoag© is well suited to be located at mine sites that are currently releasing contaminated water into streams. The small footprint of the system makes it ideal for remote locations. Similarly, the reduced maintenance requirements of the TurboCoag©, as compared to traditional EC systems, make it the optimal solution for these locations. Active Mining Water Active mine sites use large amounts of water in the mining process. The TurboCoag© is well suited to clean active mine water on site. The ability to process high volumes of water with minimal downtime make it the ideal solution. Hydraulic Fracturing Flow-Back Water During the fracturing process millions of gallons of water are used and much of this water returns to the surface unsuitable for re-use or release. Currently deep disposal wells are used to eliminate the contaminated water. TurboCoag© would reduce the amount of sludge produced from treating the water chemically, reduce the amount of water purchased allowing for re-use and reduce trucking expenses. Arsenic Removal Recently the EPA reduced the allowable levels of arsenic allowed in drinking water from 50 ppB to 10 ppB. Approximately 300,000 U.S. wells have higher than allowable arsenic levels, some of which supply entire cities. TurboCoag© was independently tested to remove arsenic at 880 ppB to levels that were undetectable at 0.5 ppB. The scalability of the technology makes it suitable to this type of market. Produced Oil Water Oil and Gas extraction produce large amounts of water that is unfit for release back into the environment. The treatment of this water is a determining factor in the profitability of oil and gas companies. TurboCoag© has the capability to effectively clean produced water.
Patreon: https://www.patreon.com/Thoisoi?ty=h Facebook: https://www.facebook.com/thoisoi2 Instagram: https://www.instagram.com/thoisoi/ Do not repeat the experiments shown in this video! Today I will tell you about the most toxic metal on earth - about thallium. In the periodic table of chemical elements thallium lies on the bottom of group 13 having an atomic number 81. Let us start off with a little bit of history. Thallium was first discovered in 1861 by an English scientist William Crookes and also simultaneously by a French chemist Claude-Auguste Lamy. It was discovered thanks to the green colour of flames, that compounds of this metal would give. Thallium was discovered when scientists studied rocks containing lead. Nowadays, it is mostly extracted from sulfidic heavy metals, such as crookesite and “gicionite” if my rendering of their names is correct. I’ve got quite old pieces of thallium for my experiment that were produced back in 1970. Since then they have been strongly oxidized and covered in dark thallium oxide. Usually to protect thallium from getting oxidized it is stored in glycerol. Do not worry, we have taken all the necessary precautionary measures. Do not try this at home! To see the shiny surface of metallic thallium, I submerged my piece of thallium in concentrated nitric acid where it slowly began to dissolve forming nitrites of this metal. Thallium’s oxides have been washed away, the metal looks shiny with bluish shades. Without its oxides this metal can easily be confused with tin or other safe metals that is why thallium is quite treacherous. It can easily be melt down because its melting point is just 304 degrees Celsius. Molten thallium oxidizes very quickly when exposed to air covering in dark thallium oxide layer. This sets it apart from other metals belonging to group 13. For instance chemical activity of metals starting from aluminium and finishing with indium steadily decreases. Indium doesn’t even oxidise when it is exposed to air and remains shiny. Thallium, however, is more active and not only has +3 oxidation state as metals placed higher in the periodic table but it also has +1 oxidation state which is quite unusual. Thallium used to be considered alkali metal for some time after it was discovered. If an oxidized droplet of thallium is submerged in nitric acid, the oxide layer will immediately dissolve after that metal’s shiny surface can be seen. Thallium’s solidness is similar to that of lead. It is also quite soft and can easily be twisted. We also used to have thallium nitrate we could use for a few experiments in our laboratory. By the way thallium compounds are the most toxic among all metals because toxic arsenic, for instance, belongs to metalloids class but we will speak about toxicity a bit later. Having put off all the fears and switched the hood to maximum suction setting I continued running my experiment with this element. Thallium nitrate doesn’t dissolve in water well and looks like white crystals. Thallium compounds, thallium sulfate to be precise, had been widely used as rat poison until 1972 but later on the practice was abandoned, because it is too toxic and it became clear that thallium sulfate was toxic to people too. If you add potassium iodide to thallium nitrate solution, there will form beautiful yellow thallium iodide sediment. In spite of being toxic this chemical has a few applications.
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Extraction of copper from copper pyrites involves the following steps. This tutorial is created based on plus two Chemistry Books. Crushing and concentration The ore is crushed and then concentrated by froth-floatation process. What is froth floatation process? In this process the powdered ore is mixed with water and a little pine oil, that is a foaming agent and the whole mixture is then stir vigorously by blowing compressed air. The oil forms the foam or froth with the air. The ore particles stick to the froth which rises to the surface. While the rocky and earthy impurities that is the gangue or matrix are left in water. The froth is skimmed of collected and allow to subside to get the concentrated ore. Roasting The concentrated ore is heated strongly in the reverberatory furnace, in excess of air. During roasting, i) Moisture is removed. ii) The volatile impurities are removed. iii) Sulphur, phosphorus, arsenic and antimony which are present as impurity are removed as volatile oxides. Sulphur plus oxygen gives sulphur dioxide. Phosphorus plus oxygen gives phosphorus pentoxide. Arsenic plus oxygen gives arsenic trioxide. The copper pyrite is partly converted into sulphides of copper and iron. Copper pyrire plus oxygen gives copper sulphide plus iron sulphide plus sulphur dioxide. Iron sulphide plus oxygen gives iron two oxide plus sulphur dioxide. Smelting The roasted ore is mixed with powdered coke and sand and is heated in a blast furnace. It is made of steel plates lined inside with fire clay bricks. Hot air at 800 degree Celsius is introduced from the tuyers near the base of the furnace. As a result, the following changes occur. Iron sulphide plus oxygen gives iron two oxide plus sulphur di oxide. Iron oxide plus silicon dioxide gives ferro-silicate. that is a fusible slag. Copper glance plus oxygen gives cupride plus sulphur di oxide. Cupride plus iron sulphide gives copper glance plus iron oxide. Iron oxide plus silicon dioxide gives ferro-silicate. That is a fusible slag. As a result of smelting, two separate molten layers are formed at the bottom of the furnace. The upper layer consists of slag and is removed as a waste while the lower layer is called matte. It chiefly consists of cuprous sulphide and some unchanged ferrous sulphide. Bessemerisation The molten matte is transfered to a Bessemer converter as shown in the visual. The Bessemer is mounted on a horizontal axis and is fitted with small pipes called tuyeres through which a blast of hot air and fine sand is admitted. Any sulphur, arsenic and antimony still present escape as their respective oxides. Ferrous sulphide present in matte is oxidised to ferrous oxide which combines with silica to form slag. Iron sulphide plus oxygen gives Iron two oxide plus sulphur di oxide. Iron oxide plus silicon dioxide gives ferrosilicate. That is a fusible slag. Some of the cuprous sulphide undergoes oxidation to form cuprous oxide which then reacts with more cuprous sulphide to give copper metal. The impure metal thus obtained is called blister copper and is about 98% pure. Cuprus sulphide plus oxygen gives cuprus oxide plus sulphur dioxide. Cuprus oxide plus cuprus sulphide gives copper plus sulphur dioxide. Refining Blister copper contains about 2% of impurities and it is purified by electrolytic refining. Electrolytic Refining This method is used to get metal of high degree of purity. For electrolytic refining of copper, A block of impure copper metal acts as anode A thin plate of pure copper metal acts as cathode Copper sulphate solution acidified with sulphuric acid is taken as electrolyte. When electric current is passed through the electrolytic solution pure copper get deposited on the cathode ,impurities settle near the anode in the form of sludge called anode mud.
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Here are the most toxic and lethal substances. From rare liquids to poisonous chemicals – you’ll be surprised with how many of them you’re surrounded by. Subscribe for new videos: http://goo.gl/SaufF4 Voiceover by Rodney Tompkins: https://www.youtube.com/c/BigBadada2012 9: Rhodium Rhodium is a chemically inert metal of the platinum group that is extremely rare, and valued as a precious metal. Due to its high value and resistance to corrosion, the element is usually alloyed with other precious metals to be served as metal plating. White gold for example, is plated with rhodium layer 8: Ricin Ricin is one of nature's deadliest substances that is found in plants instead of animals. It is a naturally occurring carbohydrate-binding protein that is produced in the beans of a castor oil plant. The toxic substance has the ability to inactivate and wreak havoc on ribosomes within our cells, resulting in impaired ability to further synthesize proteins. Just a mere 500 micrograms of ricin is enough to kill an adult human. To put that into perspective, that's about 7: Strychnine Strychnine is an alkaloid found in the plants of the genus Strychnos, which are native to many tropical countries. However, the substance could now also be produced artificially in labs. Strychnine acts as a neurotoxin that primarily affects the motor nerves in the spinal cord. Exposure to it would cause a chemical in the nerves that regulates muscle contraction to be blocked, causing the muscles to be in a constant state of stimulation. A victim could be affected by strychnine by inhalation, ingestion, or even by absorbing it through the eyes 6: Arsenic Arsenic is a metalloid that usually exists in combination with other metals and elements, although it can exist as a pure elemental crystal. Arsenic has many useful applications, such as being alloyed with lead to create components in automotive batteries and ammunition. It also happens to be a very toxic substance, so are used as components for pesticides and weed killers. And like any other potent poison, arsenic is capable of causing serious harm and even death to men. What arsenic does to the body is attack the ATP enzymes responsible for cellular energy production 5: Mercury It shouldn't be news that those shiny silvery liquids you find in thermometers are poisonous. Compounds of the chemical element mercury are highly lethal, even through skin contact. A chemist professor named Karen Wetterhahn died in 1997 due to accidental exposure to organic mercury during an experiment, even though it was only a few drops that spilt onto her latex gloved hand. Toxicity of the metallic element is due to its ability to inhibit enzymes 4: Tetrodotoxin Fugu is a rare and exotic Japanese puffer fish dish that is popular among thrill seeking diners. The catch of tasting this delicious cuisine is that it might be your last meal if the chef makes the slightest mistake in preparing it. Puffer fish is one of several sea creatures that harbor a deadly substance called tetrodotoxin inside its organs. What the toxin does is selectively block sodium channels at nerve endings, causing muscle paralysis. A person unlucky enough to ingest it would suffer from general paralysis 3: Cyanide Cyanide is probably one of the world’s most well known poisons, and is capable of killing victims in a matter of minutes. Because of its efficacy, it is a popular and favorite killing tool by both real life and fictional killers. Chemically speaking, cyanide is a carbon atom triple bonded to a nitrogen atom. What makes it such a fast killer is that it quickly binds to the mitochondria in living cells 2: Sarin In 1938, German scientists discovered an extremely toxic liquid while trying to create strong pesticides. It was a nerve agent of high potency that they named Sarin, which was an acronym for the names of the discoverers. When the Second World War broke out the following year, the sarin formula was passed to the Nazi army's chemical warfare section to be mass produced. As a nerve gas, sarin was found to be 26 times more lethal than cyanide. Another thing that makes it so dangerous is the fact that it’s physically undetectable, as it is both colorless and tasteless. Once inhaled, sarin acts at nerve synapses by inhibiting the breakdown of the neurotransmitter acetylcholine 1: The Botulinum Toxin The most toxic substance known to man is probably the very same substance that is injected into peoples' faces to remove wrinkles. We are talking about Botox, or rather, its unpurified form known as botulinum toxin. Just 1 gram is enough to kill 14,000 people if swallowed, or 8.3 million if injected directly into the bloodstream. The deadly neurotoxin is produced by Clostridium botulinum bacteria. It causes botulism, a rather rare but serious illness mainly transmitted through contaminated canned food. What it specifically does is block the release of the neurotransmitter acetylcholine from nerve endings, causing a state of generalized
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The state attorney generals office is indicting the company behind an Arizona mine for leaking arsenic into a neighboring creek.
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World's Largest Silver Mines: Silver Mining - Amazing Documentary TV Silver mining is the resource extraction of silver by mining. Silver is found in native form very rarely as nuggets, but more usually combined with sulfur, arsenic, antimony, or chlorine and in various ores such as argentite (Ag2S), chlorargyrite ("horn silver," AgCl), and galena (a lead ore often containing significant amounts of ... Read More: https://en.wikipedia.org/wiki/Silver_mining Subscribe For Updates: https://www.youtube.com/channel/UCknq6S56gV50QSnNYKp1yng
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What is COBALT? Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Cobalt-based blue pigments (cobalt blue) have been used since ancient times for jewelry and paints, and to impart a distinctive blue tint to glass, but the color was later thought by alchemists to be due to the known metal bismuth. Miners had long used the name kobold ore (German for goblin ore) for some of the blue-pigment producing minerals; they were so named because they were poor in known metals, and gave poisonous arsenic-containing fumes upon smelting. In 1735, such ores were found to be reducible to a new metal (the first discovered since ancient times), and this was ultimately named for the kobold. Today, some cobalt is produced specifically from various metallic-lustered ores, for example cobaltite , but the main source of the element is as a by-product of copper and nickel mining. The copper belt in the Democratic Republic of the Congo, Central African Republic and Zambia yields most of the cobalt mined worldwide. Cobalt is primarily used in the preparation of magnetic, wear-resistant and high-strength alloys. The compounds, cobalt silicate and cobalt aluminate give a distinctive deep blue color to glass, ceramics, inks, paints and varnishes. Cobalt occurs naturally as only one stable isotope, cobalt-59. Cobalt-60 is a commercially important radioisotope, used as a radioactive tracer and for the production of high energy gamma rays. Cobalt is the active center of coenzymes called cobalamins, the most common example of which is vitamin B12. As such, it is an essential trace dietary mineral for all animals. Cobalt in inorganic form is also a micronutrient for bacteria, algae and fungi.
Views: 14974 Knowledge Archive
At one point in time, the entire mojave desert was covered in water and before European settlers moved in, it was inhabited by massive wild animals, and advancee native americwn civilizations some of whic mysteriously disappeared. From sandals left by the anasaxi to even a mummified cowboy, here are... Subscribe to Talltanic http://goo.gl/wgfvrr Watch our "Evidence That Aliens HAVE Visited Earth " video here:- https://www.youtube.com/watch?v=iL227eb9FSI Watch our "CRAZY Ideas That Actually Worked!" video here- https://www.youtube.com/watch?v=v0n2wEAiOcg Watch our UNBELIEVABLE Items Found After Tsunamis !" video here- https://www.youtube.com/watch?v=VNNLwdBI7Gk 6. Sloth Dung A giant, extinct sloth once lived inside caves in Utah and it turns out he used this cave as a toilet, whenever duty called. Analyzing this mummified dung can give researchers an insight on what he was eating 11,000 years ago. A chemical analysis shows that it feasted on a shrub known as desert globemallow, which is often nicknamed Mormon Tea, as well as a drought surviving plant known as saltbush. Modern days sloths don’t regulate temperature very well and finding this dung inside a cave also proves that they must have began finding shelter in caves in order to keep warm. This give them a good idea of what plants were growing in present day Utah as well as the climate 5.Anasazi Sandals The anasazi are a very mysterious tribe of native americans who often had some strange displays of cave art near the 4 corners region of the united states. Did you think californians were the first to use flip flops? That’s clearly not the case as more and more sandal artifacts from the anasazi people are showing up! The desert ground is often hot for at least half of the year and it’s not the easiest thing to step on if you’re barefoot. The anasazi manufactured sandals made from whole leaf yucca which was woven carefully to the person’s foot. Prehistoric sandals were nothing like the kind of shoes we have today but the crafting techniques certainly show a degree of sophistication. Sandals were interweaved with looms diagonally from one side of the sandal to the other, creating enough layers to keep their feet protected on a minimal level 4.Cowboy Mummy There aren’t a whole lot mummies in North America compared to places like Egypt or Peru but the very few mummies that have been discovered in our deserts are pretty creepy. This mummy were looking at here was found in the desert near Gila Bend Arizona and he was given the nickname of Sylvester, kind of like the cat. Rumor on the web has it that he was caught cheating while playing poker, and tried to escape the angry person shooting at him by running off into the desert. He bled out and the dry desert preserved his body. However that might have just been a story to attract some attention. It’s most likely that his body was quickly preserved with an abnormally large amount arsenic after passing. It’s turned out the real answer was a little bit of both stories and he was found to have buckshot in his internal organs. He’s on display at the Ye old curiousity shop in seattle washington. 3. The Mojave Nugget The largest known golden nugget found in California is known as the Mojave nugget and it was found in 1977 by a prospector Ty Paulsen. Weighing in at 4.9 kilograms it’s worth roughly 205,800 dollars with the current price of gold! Who knew a hobby could result in such a life changing discovery. The massive chunk of gold ore was found near Randsburg, California which as had a history of gold mining since 1895 when gold was first discovered. Ty Paulsen is certainly happy no other pioneer was able to find this chunk of metal! It was apparently so heavy, that a special gold scale had to be created for this specific specimen. It was donated to the natural history museum of los angeles county which seems like one heck of a donation! Instead of playing the lottery, you might as well just buy a metal detector and get to work 2.Petroglyphs of Sloan Canyon Located south of Las Vegas, the petroglyphs of sloan canyon are often overlooked by the petroglyphs at the valley of fire or red rock canyon. How these should not be overlooked, and are some of the best preserved petroglyphs in the western united states. It’s not a tourist friendly attraction and the sloan canyon conservation area was created basically to keep people out rather than to keep them in.. They date back to 12,000 years ago and it requires an intense 2 to 3 mile hike to reach. Much of the artwork is open to interpretation and some of them might even make you wonder if the piutes who lived here might have made some kind of contact with extraterrestrials. It’s believed that the valley was filled with more water at one point in time, meaning that it was much more habitable than it is now. 1...
Views: 402642 Talltanic
Amazing Silver Mines in the World - History Documentary Silver mining is the source removal of silver by mining. Silver is discovered in native type quite seldom as nuggets, however much more normally combined with sulfur, arsenic, antimony, or chlorine and also in various ores such as argentite (Ag2S), chlorargyrite ("horn silver," AgCl), as well as galena (a lead ore usually containing substantial quantities of silver). As silver is typically found along with these or alloyed with various other metals such as gold, it generally needs to be additional removed out via combinations or electrolysis. Silver mining has been taken on given that very early times. As silver is a rare-earth element often used for coins, its mining has traditionally commonly been financially rewarding. As with various other precious metals such as gold, recently found deposits of silver ore have stimulated silver hurries of miners seeking their lot of moneys. In current centuries, large down payments were discovered as well as extracted in the Americas, affecting the growth and also property development of Mexico, Andean nations such as Bolivia, Chile, and also Peru, in addition to Canada and also the Usa. check our channel s://..com/channel/UCnAK... visit our website ://mandkinddocumentary.blogspot.com/
Views: 55 Jefka Lawrence
Around 10,000 people protested in Greece's second largest city, Thessaloniki, on Saturday, against the continued development of a gold mine nearby. In video courtesy of www.thesstoday.gr, protesters are seen carrying banners showing their disdain with the mining project. Thessaloniki is located around 125 km from the Skouries mine near the town of Ierissos. The Skouries gold mine project is being developed by Hellas Gold, 95% of which is owned by the Canadian mining group Eldorado Gold Corporation, the world's ninth largest producer. The remaining 5 % of the mine is owned by Greek magnate George Bobolas through his construction company AKTOR. Bobolas is also a media tycoon with a significant share of the Greek TV and radio market, as well as major newspapers in the country. Residents of the Chalkidiki area, which accommodates many Thessaloniki inhabitants during the summer, say the open mine pit will threaten their tourism industry and the region's environmental stability. The forest that surrounds Ierissos is a rare surviving part of the European primordial forests. Residents believe the mining site is likely to pollute the peninsula with mercury, arsenic and cyanide in the form of dust and acid rains. Demonstrators were also protesting against the violent force used by the Greek riot police (MAT) and its anti-terrorism special force (EKAM), as police clashed violently with Ierissos's residents on Thursday. Security forces were searching for suspects of an arson attack that took place at the Skouries mine in February, when around 40 masked individuals raided the mine facilities, torching machinery, vehicles and containers used as offices. During the clashes, clouds of chemical smoke filled the area around Ierissos and residents claim that irritant aerosol weapons were fired at the school affecting a number of children. In the operation four people were arrested and charged with illegal possession of weapons and fireworks. Their trial has been set for March 20.
Views: 1122 Ruptly
Concern to public health is rising as a result of environmental contamination through naturally occurring Arsenic. Also, with increased activity of smelting, mining and other industrial applications, The risk to public health needs to be managed through the monitoring of water sources, including drinking water sources. The Trace2o Arsenometer™ allows completely portable analysis of your water sample, down to as low as 1ppb of Arsenic. The lightweight waterproof unit is capable of speciation between Arsenic III and Arsenic V within 5 minutes without the production of arsine gas or the use of prohibited substances such as mercuric bromide, making the process safer and faster for the user. The tests produce no plastic waste that can harm the environment if not properly disposed of, and comes complete with all reagents required for 200 Arsenic tests. Additional tests are readily available on request. ARSENOMETER™BENEFITS: No toxic gasses products, including arsine gas Low cost per test No hazardous mercuric bromide involved No plastic waste from used consumables Speciates both As III and AsV on one meter Long life rechargeable batteries(included) Low maintenance push fit electrodes Lightweight single case kit (less than 7Kg ) Accurate down to 1ppb 5 minute test Waterproof IP67 unit with rugged back lit LCD display Visit www.Trace2o.com Download Arsenometer brochure here: https://documentcloud.adobe.com/link/track?uri=urn%3Aaaid%3Ascds%3AUS%3A35c38aa8-89aa-4cbd-8bf6-837d9fba65ce
Views: 84 Trace 2o
Ships I Used In This Video Diamondback Explorer - https://eddp.co/u/XZzfGaZc
Views: 289 SAI Warrior
Klinkau filter elements are being used in treatment plants within the mining industry. Their most frequent application is for dewatering coal and coal-fine tailings as well as ore concentrates such as zinc, iron, copper and noble metals. These concentrates emerge from the flotation process where they then undergo dewatering to reach the required maximum permissible water content (TMC) for transportation.
Views: 535 Klinkau Filtration Systems
The LIBS In-Line Grade Scanner is a quick and accurate scanner that can be used for primary in-line scanning for typical valuable materials (e.g. detect copper grade in copper ore) and forms the basis for Bulk Sorting at your mining site. Furthermore it can be used for secondary search for other valuable elements (e.g. Rare Earth Elements in tailings) or for penalty elements in ores (e.g. Arsenic in copper or gold ores). The equipment can also have applications off-line as a containerized closed loop principle, ideal for academic research, on-site R&D at the mine and as training or education tool.
Views: 595 Royal Eijkelkamp
Antimony is a silvery-white metal that is found in the earth's crust. Antimony ores are mined and then mixed with other metals to form antimony alloys or combined with oxygen to form antimony oxide. The Agency for Toxic Substances & Disease Registry (ATSDR) reports that little antimony is currently mined in the United States, but it is brought into the country from other places for processing. There are also companies that produce antimony as a by-product of smelting lead and other metals. Antimony mixed into alloys is used in such products as lead storage batteries, solder, sheet and pipe metal, bearings, castings and pewter. Antimony oxide is added to textiles and plastics to prevent them from catching fire, and it is also used in paints, ceramics and fireworks, and as enamels for plastics, metal and glass. The ATSDR states that antimony enters the environment during the mining and processing of its ores and in the production of antimony metal, alloys, antimony oxide, and combinations of antimony with other substances. Small amounts of antimony are also released into the environment by incinerators and coal-burning power plants. Antimony can enter the human body when people drink water or eat food, soil or other substances that contain it. Antimony can also enter the body if people breathe contaminated air or dusts. Workers in industries that utilize antimony are at potential risk of exposure to elevated levels. There is an existing occupational airborne exposure limit from OSHA meant to protect workers. The ATSDR reports that exposure to antimony at high levels can result in a variety of adverse health effects. Breathing high levels for a long time can irritate the eyes and lungs and can cause heart and lung problems, stomach pain, diarrhea, vomiting and stomach ulcers. Ingesting large doses can cause vomiting. Long-term animal studies have reported liver damage and blood changes when ingested. Antimony can also irritate the skin if it is left on it. These are just a few things to know about potential occupational and environmental exposures to antimony. To learn more about this or other environmental, indoor air quality, health, safety or occupational issues, please visit the websites shown below. Clark Seif Clark http://www.csceng.com EMSL Analytical, Inc. http://www.emsl.com LA Testing http://www.latesting.com Zimmetry Environmental http://www.zimmetry.com Healthy Indoors Magazine http://www.iaq.net VOETS - Verification, Operations and Environmental Testing Services http://www.voets.nyc
Views: 1263 Paul Cochrane
I've covered this in earlier videos, much like the use of Mohs Hardenss Scale there seems to be some confusion over copper vs bronze vs iron. Just like plastic there are different types with different properties depending on the blend and manufacturing. Arsenical copper naturally occurs in Egypt, Peru and in several other locations with ancient sites. Using pure bronze or coppper as an example of ancient tool making doesn't really cut the mustard, especially in regions that have copper naturally rich in arsenic. Arsenical copper has very different properties than copper, alloys often do. Chromium steel vs other steels vs iron. Consider the differences between forged, cast and other irons. Same material but with very very different properties. Arsenical bronze for instance would be almost the equivalent of iron, so if iron tools can do it well....... Ancient metallugists understood this. Ancient sword/blade makers especially had wicked skills. As analysis of ancient objects shows. Just like copper and tin make the alloy bronze the additional of antimony, bismuth or arsenic makes the alloy an even better tool-weapon. Several ancient depictions-descriptions from ancinet culture have metallurgical figures with symptons similar to arsenic poisoning. Whether naturally occuring or with a little metallurgy to get the recipe just right just a dab of arsenic- just a quick listing, arsenical copper- arsenical bronze in ancient world as search terms will provide a mountain of furhter evidence http://www.ucl.ac.uk/museums-static/digitalegypt/metal/metalinegypt.html http://www.abc.net.au/science/articles/2015/03/31/4206279.htm http://pages.ucsd.edu/~dkjordan/arch/metallurgy.html http://www.qucosa.de/fileadmin/data/qucosa/documents/2044/dissjunk.pdf
Views: 276 SGD Sacred Geometry Decoded
It's way past time to learn how to drive the SRV, so I might as well do it and attempt some mining along the way. I probably could use some practice landing on planets as well, because, apparently, I can't remember to deploy the landing gear when setting the ship down. These are important things to do whilst awaiting the Elite: Dangerous Update! (^.^)v THE GAME, VOICE ATTACK, VOICE PACK, & GEAR::::::::::::: ►Alienware R7 GTX 1070 Gaming Desktop http://amzn.to/2FWO0wq ►Thrustmaster T-Flight HOTAS X : http://amzn.to/2q1JcNK ► HOTAS & Keyboard Bindings I used: https://www.mcdee.net/elite/binds/prlytl?replay=prlytl *(note: keyboard settings include those for Voice Attack--VoicePack Orion) ► More about Elite Dangerous here: https://www.elitedangerous.com/ ► Elite Dangerous on STEAM: http://store.steampowered.com/app/359320/ ► Voice Attack on STEAM: http://store.steampowered.com/app/583010/VoiceAttack/ ► HCS VoicePacks: https://www.hcsvoicepacks.com/ ☺Where to Find Me!☺ ►Instagram: @starcat7 ►Twitter: @starcat70 ►Snapchat: starcat70 ►Facebook: http://facebook.com/chanshauna ►Tumblr: http://starcat70.tumblr.com/ ►Blogger: http://spiritsuds.blogspot.com ►STEAM: http://steamcommunity.com/id/dark70star/ ►Come see my Spreadshirt store! http://starcat70.spreadshirt.com/ ►♪♫Music Credits♫♪ Royalty Free Music & SFX Provided by Epidemic Sound http://www.epidemicsound.com **(music is in order of when it first appears) 1. Rings Of Saturn - Gunnar Johnsén 2. Retrouvailles - Henrik Olsson 3. A Cold Wind - Savvun 4. Through The Storm - Savvun 5. Black Radience - Niklas Johansson 6. Time Pressure 5 - Håkan Eriksson 7. Event Horizon - Niklas Johansson 8. Extreme Negotiations 2 - Johannes Bornlöf 9. Skyfall 1 - Johannes Bornlöf 10. Rise Of The Velcro - Gavin Luke 11. Rise Of The Phoenix 2 - Johannes Bornlöf 12. Skyfall 2 - Johannes Bornlöf ▲Video Software & Audio Gear▲ Video and audio edited by me. (^.^)v Gameplay captured with OBS Studio Voice Over captured with Zoom H2 Audio & Video edited with Movie Studio Platinum 13 FTC: I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for me to earn fees by linking to Amazon.com and affiliated sites.
Views: 186 Shauna Chan
Basically any grade 1 to 3 (all except rare and very rare ones) we can mine from asteroids. (c) Frontier
Views: 6536 Kornelius Briedis
Environmental Protection Agency officials have said that the spill from Gold King Mine (inset left) in Colorado actually leaked three million gallons of waste containing zinc, copper, lead and arsenic. The Animas River, previously used as a background for Butch Cassidy and the Sundance Kid, was turned bright orange (center) last week as the contaminated water advanced downstream. Officials have begun testing (top right) the water's affect on wildlife as well as the levels of heavy metals in affected wells. Original Article: http://www.dailymail.co.uk/news/article-3192557/Officials-admit-waste-spill-Colorado-actually-THREE-TIMES-larger-thought-contaminated-water-turning-rivers-orange-laced-arsenic.html Original Video: http://www.dailymail.co.uk/video/news/video-1205354/Pollution-Colorado-gold-triples-EPAs-estimate.html Daily Mail Facebook: http://facebook.com/dailymail Daily Mail IG: http://instagram.com/dailymail Daily Mail Snap: https://www.snapchat.com/discover/Daily-Mail/8392137033 Daily Mail Twitter: http://twitter.com/MailOnline Daily Mail Pinterest: http://pinterest.co.uk/dailymail Daily Mail Google+: https://plus.google.com/+DailyMail/posts Get the free Daily Mail mobile app: http://dailymail.co.uk/mobile
Views: 24 Daily Mail
Protesters marched on the Peruvian Congress in Lima on Friday after traveling over 300 kilometers from the Andean province of Pasco. They demanded medical attention for metal poisoning resulting from mining operations in central Peru. The protesters have walked for over 15 days from a region that has been used for mining since Spain colonized the region. They report conditions such as stunted growth, loss of balance and arsenic poisoning. teleSUR http://multimedia.telesurtv.net/v/peru-mining-protesters-demand-medical-attention/
Views: 18 TeleSUR English
The immensity of the public health problem created by chronic arsenic contamination of groundwater is well-documented and severely affects low-income and low-literacy demographical regions. The Indian Institute of Technology Kharagpur has developed a low-cost technology for arsenic water purification that is ideally suited for the socio-economic conditions of developing countries. An activated laterite-based filter does not require any regeneration or backwashing, and the filtered water is always within the WHO permissible limit of 0.01 mg/l - making it a very promising solution. Filtered water can be produced at just $0.35 per cubic meter. The Indian Institute of Technology Kharagpur is an IChemE Global Awards finalist for the Water award and Outstanding Chemical Engineering Innovation for Reosurce-Poor People. "The laterite based technology is one the greenest method for arsenic remedial. The cost of filtered water is 2 paise per liter only and does not require any regeneration. Disposal of spent media is non-polluting and can be used in road laying and preparation of pavement blocks.The developed technology is entirely indigenous and in line with Prime Minister's call of Make in India." - Prof. Sirshendu De, Department of Chemical Eng, IIT Kharagpur
Views: 382 Institution of Chemical Engineers (IChemE)
Natives of North America began to heat/pound/craft copper into tools, jewelry and art which began in 8,000 B.C. from the ancient mines in the Great Lakes area. 1,000 BC - 600 AD Natives of S. America developed methods of smelting using ovens with temperatures of 700-1800 C to created alloys such as arsenic bronze, tumbaga, guanín, caracoli and more. Some Artifacts found north of Mesoamerica display evidence of smelting and alloys, some of these copper artifacts have air bubbles which indicates casting and smelting (Although little study exist of the Northern Tribes and Nations), arsenic bronze, silver, alloys and gold pieces have been found north of Mesoamerica, Natives of the Mississippian culture adopted the alloy and bronze age from Mesoamerica in 600 A.D. Natives of the Americas used zinc, nickel, iron, silver, copper, mica, gold, platinum metals among others.. 500 AD Natives of Ecuador discovered a method to work platinum (a metal difficult to melt) into objects, they invented a process known as "Sintering" - mixing granules of silver with platinum to lower the melting point of platinum, which is 1770C. The Inca used platinum to create jewelry and as an ingredient in alloys used to hardened tools and ornaments The Spanish learned how to melt platinum from the Inca. Platinum is now used has a protective coating in machinery. American Indian metallurgists also invented electroplating, a chemical process they used to gild copper and alloys that they made from silver, copper and gold. The Moche, who lived on the coast of northern Peru, invented this process between 200 B.C. and A.D. 600. http://www.mpm.edu/collections/artifacts/anthropology/oldcopper/artifacts/ http://torrivent.blogspot.com/2009/11/native-metallurgy.html
Views: 22064 Thomas Oklahoma
Jack Bedder and Nils Backeberg from Roskill discuss with Proactive Investors their near term expectations for demand and supply of Antimony. Antimony is mostly used in flame retardants and lead-acid batteries. Together these end-uses accounted for 84% of antimony demand in 2017.
Views: 862 Proactive Investors Stocktube
Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Cobalt-based blue pigments have been used since ancient times for jewelry and paints, and to impart a distinctive blue tint to glass,, but the color was later thought by alchemists to be due to the known metal bismuth. Miners had long used the name kobold ore for some of the blue-pigment producing minerals; they were so named, because they were poor in known metals, and gave poisonous arsenic-containing fumes when smelted. In 1735, such ores were found to be reducible to a new metal , and this was ultimately named for the kobold. Today, some types of cobalt are produced specifically from one of a number of metallic-lustered ores, such as for example cobaltite . The element is howev... http://www.wikividi.com ____________________________________ Shortcuts to chapters: 00:02:19 Characteristics 00:03:39 Compounds 00:04:11 Oxygen and chalcogen compounds 00:04:58 Halides 00:05:47 Coordination compounds 00:07:25 Organometallic compounds 00:08:14 Isotopes 00:09:29 History ____________________________________ Copyright WikiVidi. Licensed under Creative Commons. Wikipedia link: https://en.wikipedia.org/wiki/Cobalt
Views: 146 WikiVidi Documentaries
"Antimony" is a chemical element with symbol "Sb" and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite . Antimony compounds have been known since ancient times and were used for cosmetics; metallic antimony was also known, but it was erroneously identified as lead upon its discovery. It was first isolated by Vannoccio Biringuccio and described in 1540. For some time, China has been the largest producer of antimony and its compounds, with most production coming from the Xikuangshan Mine in Hunan. The industrial methods to produce antimony are roasting and subsequent carbothermal reduction or direct reduction of stibnite with iron. The largest applications for metallic antimony are as alloying material for lead and tin and for lead antimony plates in lead–acid batteries. Alloying lead and tin with antimony improves the properties of the alloys which are used in solders, bullets and plain bearings. Antimony compounds are prominent additives for chlorine and bromine-containing fire retardants found in many commercial and domestic products. An emerging application is the use of antimony in microelectronics. Antimony is in the nitrogen group and has an electronegativity of 2.05. As expected from periodic trends, it is more electronegative than tin or bismuth, and less electronegative than tellurium or arsenic. Antimony is stable in air at room temperature, but reacts with oxygen if heated, to form antimony trioxide, Sb 2 O 3 . Wiz Science™ is "the" learning channel for children and all ages. SUBSCRIBE TODAY Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK. Background Music: "The Place Inside" by Silent Partner (royalty-free) from YouTube Audio Library. This video uses material/images from https://en.wikipedia.org/wiki/Antimony, which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . To reuse/adapt the content in your own work, you must comply with the license terms. Wiz Science™ is "the" learning channel for children and all ages. SUBSCRIBE TODAY Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK. Background Music: "The Place Inside" by Silent Partner (royalty-free) from YouTube Audio Library. This video uses material/images from https://en.wikipedia.org/wiki/Antimony, which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . To reuse/adapt the content in your own work, you must comply with the license terms.
Views: 13488 Wiz Science™
Unlocking Value for Shareholders Exeter Resource Corporation is a Canadian public company listed on the TSX and NYSE Amex exchanges. Our focus is the discovery, evaluation and development of gold deposits in the Maricunga district in Chile. Exeter's 100% owned Caspiche Project in Chile (with a 3% Net Smelter Royalty to Anglo American Chile Limitada) is a gold-copper porphyry system, a type of deposit common to many of the world's largest open pit gold-copper mines. It is located in the prolific Maricunga mineral belt which is currently undergoing massive expansion and investment in mineral projects from some of the worlds largest gold miners. The project is located 15 kilometres (8 miles) south of Kinross Gold's operating Refugio mine (+9 million ounce gold reserve), and 10 kilometres (6 miles) north of the very large Cerro Casale gold-copper deposit (26 million ounce gold reserve), owned by Kinross Gold (25%)and Barrick Gold (75%). The Pre-feasibilty study used proven and probable mining reserves in the development of the mine plan and financial evaluation (based on measured and indicated resources). Total proven and probable ore reserves, generated from an updated resource estimate for the Super Pit are 1.091 billion tonnes containing 19.3 million ounces gold, 4.62 billion pounds copper, 41.5 million ounces silver. This represents on of the largest mineral endowments for any deposit to be held by a junior explorer. Further its location within a developed mining region within a politically stable country serve to highlight to value of this giant deposit, making it attractive to all medium to large scale producers who desire a stable, low risk metal production stream. A key component of the PFS is the inclusion of high tonnage IPCC systems for the movement of waste rock. This achieves greater efficiencies in the movement of the pit overburden, not only to address rising operating costs for mining waste, but also the capital and operating costs involved in the construction of tailings dam walls using conventional methods. The mine reserves and key mine production characteristics are: The mine reserves and key mine production characteristics are: The PFS has considered a conventional concentrator process route for the sulphide ore but includes a roaster to reduce arsenic levels in the final copper concentrate to commercially acceptable levels and also a flotation tailings leach process to maximise gold recovery from the sulphide ore. In parallel with the concentrator a valley fill heapleach will be operated to recover gold from the near surface heap leachable material which is extracted as part of the overall mine development and operation. Currently The company is fast tracking Ongoing metallurgical programs designed to improve metal recoveries which if successful would positively impact the project economics, Detailed geotechnical studies to support the infrastructure placement Hydrology and hydrogeological studies both at Caspiche and locations with potential to act as viable water sources for the operations Environmental base line programs to support an eventual EIA All of which is designed to feed into a full feasibility study for the oxide stand alone portion of the project and a timely update the prefeasibility study on the larger project which is expected to both improve the already robust economics and address critical project development areas. Financial Summary and Study Highlights: The project showed robust economics and strong leverage at current gold prices to generate significant revenue with a a pre-tax Net Present Value (5% discount), calculated from the time of commencement of the project, of US$ 2,800 million and average operating costs of US$ 606 per ounce gold equivalent1. The gold production cost drops to US$ 18 per ounce when copper and silver by-product credits are considered.
Views: 2064 Even Keel Media