What is cyanide?
Banning Cyanide Use in Mining - Frequently Asked QuestionsCyanide refers to a group of compounds made of carbon and nitrogen. Cyanide solutions readily bond with gold, silver and other metals, which is why the mining industry uses it. Cyanide is usually stored and transported as a solid. It is stable when dry. Most cyanide solids will dissolve in water to produce toxic cyanide gas. Cyanide gas is colorless and smells like bitter almonds.
Related QuestionsNewmont Mining Corporation - Cyanide FAQ'sCyanide is a chemical made up of Carbon and Nitrogen, CN. Hydrogen cyanide is a colorless gas with a faint, bitter, almond-like odor. Sodium cyanide and potassium cyanide are both white solids with a bitter, almond-like odor in damp air. In certain plant foods, including almonds, millet sprouts, lima beans, soy, spinach, bamboo shoots, and cassava roots (which are a major source of food in tropical countries), cyanides occur naturally as part of sugars or other naturally-occurring compounds.Related Questions
Q.-What about the toxicity of cyanide?
Cancer F.A.Q'sA.- Cyanide can be highly toxic and even fatal if taken in sufficient quantity. However, locked as it is in this natural state, it is completely inert chemically and has absolutely no effect on living tissue.
Related QuestionsAre there alternatives to cyanide?
Banning Cyanide Use in Mining - Frequently Asked QuestionsThe U.S. Environmental Protection Agency lists several alternatives to cyanide, including starch and sulfur dioxide. In 1999, 16 of 18 leading U.S. zinc mines and 11 of 15 leading U.S. copper mines did not use cyanide. For gold and silver extraction, the Haber Gold Process (HGP) has been proposed as a possible alternative.
Related QuestionsQ.-How come the cyanide does not poison us?
Cancer F.A.Q'sA.- There is another important enzyme called "rhodanese", which we shall identify as the "protecting enzyme". (Since about 1965, rhodanese has been identified in the technical literature as thiosulfate transulfurase.) The reason is that it has the ability to neutralize cyanide by converting it instantly into by-products that actually are beneficial and essential to health.
Related QuestionsHow is cyanide used in mining?
Banning Cyanide Use in Mining - Frequently Asked QuestionsCyanide-leaching allows mining companies to reopen and expand mines containing what were previously unprofitable mineral reserves. There are two types of cyanide-leaching processes used by the modern mining industry.
Related QuestionsWhat are the dangers of using cyanide?
Banning Cyanide Use in Mining - Frequently Asked QuestionsCyanide reacts with many other elements and is known to breakdown into several hundred different cyanide-related compounds. Despite the risks posed by these breakdown compounds, mines are not required to monitor or report these chemicals. Cyanide-leaching, as practiced by the modern mining industry, is inherently dangerous to the environment and the communities surrounding a mine that uses the process. As cyanide use continues, so do serious accidents and spills.
Related QuestionsIs cyanide safe, and is it necessary?
Banning Cyanide Use in Mining - Frequently Asked QuestionsDespite mining industry assertions to the contrary, the record clearly demonstrates that cyanide leach mining is not being practiced safely. It is potentially very dangerous to the environment, wildlife, and humans. The hardrock mining industry has a history of cyanide spills, with billions of gallons of cyanide contamination released into the environment, ever since cyanide-leaching began in the 1970s. Furthermore, cyanide-mining may not be necessary.
Related QuestionsWhy is cyanide dangerous?
Newmont Mining Corporation - Cyanide FAQ'sIn large amounts cyanide is very harmful to people, it is a fast acting poison in the human body. It affects our ability to breathe. Severe breathing difficulties develop very rapidly when cyanide is swallowed, inhaled or absorbed through the skin. If people are exposed to concentrated levels of cyanide it can be lethal.
Related QuestionsMRF Environment ForumCyanide is a fast acting poison in the human body. It affects our ability to breathe. Severe breathing difficulties develop very rapidly when cyanide is swallowed, inhaled or absorbed through the skin. Highly poisonous cyanide gas can be produced when cyanide solids or liquids are mixed with moisture in air, or with steam, acid, acid fumes or if air is bubbled through a cyanide solution. Cyanide gas is highly flammable and reacts violently in some situations (e.g.Related Questions
How does cyanide affect living organisms?
Banning Cyanide Use in Mining - Frequently Asked QuestionsCyanide is highly toxic. Cyanide is the killing agent used in gas chambers. Cyanide poisoning can occur through inhalation, ingestion, and skin or eye contact. One teaspoon of a 2% solution can kill a person. In general, fish and other aquatic life are killed by cyanide concentrations in the microgram per liter (part per billion) range, whereas bird and mammal deaths result from cyanide concentrations in the milligram per liter (part per million) range.
Related QuestionsHow can workers be exposed to cyanide?
Newmont Mining Corporation - Cyanide FAQ'sWorkers at gold mining operations can be exposed to cyanide during the heap leaching or tank extraction process. Controls are in place to ensure workers are not exposed to concentrated levels of hydrogen cyanide. Cyanide can and is used safely in the extraction of gold and silver. Newmont has used cyanide in precious metals recovery processes for approximately 40 years. Over that period no one has ever died from cyanide at Newmont operations.
Related QuestionsWhat happens to cyanide if it gets into the environment?
Newmont Mining Corporation - Cyanide FAQ'sCyanide quickly breaks down in sunlight and when exposed to air and in surface water cyanide will form hydrogen cyanide, evaporate and decompose to ammonia and carbon monoxide. It is also not known to build up the tissue of fish. Governments stipulate strict surface and ground water limits for cyanide. Any spills to the environment are typically small and are cleaned up and returned to processing facilities quickly.
Related QuestionsHow can communities be exposed to cyanide?
Newmont Mining Corporation - Cyanide FAQ'sThe cyanide used at the mine site is transported from the manufacturing plant to the mine site. If there was a road accident involving the container that carries the cyanide communities may be exposed. If people gain unauthorized access to the mine site and are aware of the hazards and their location they may be exposed to cyanide.
Related QuestionsWhat is the first aid treatment for cyanide poisoning?
OPTIMUM Training LimitedRemove casualty from exposure, rest and keep warm. Oxygen should be administered if available. If breathing has stopped give artificial ventilations using oxygen and a suitable mechanical device such as a bag and mask. Do not use mouth to mouth resuscitation. Remove all contaminated clothing immediately. Wash the skin with plenty of water. Treat casualty as for inhalation. There is no recommended use of any antidote in the first aid treatment of cyanide poisoning.
Related QuestionsQ. If vitamin B-17 kills cancer-using cyanide, is it possible for the cyanide to kill normal cells?
World Without Cancer - worldwithoutcancer.org.uk - B17 Laetr...Absolutely Not. Research shows that the normal cells in our organism contain an enzyme called Rodhanese which "neutralises" the Amygdalin. This enzyme does not allow the Amygdalin to release the cyanide. In this way, Amygdalin only serves as glucose to healthy cells providing energy. Malignant cells do not contain this enzyme.
Related QuestionsWhat happens to cyanide when released to the environment?
MRF Environment ForumCyanides are not persistent in water or soil. Cyanides may accumulate in bottom sediments, but residues are generally as low as <1 mg/kg even near polluting sources. Majority of an accidental release of cyanide is volatilised to the atmosphere where it is quickly diluted and degraded by ultra violet. Other factors, such as biological oxidation, precipitation and the effects of sunlight also contribute to cyanide degradation.
Related QuestionsWhat are the cyanide extraction processes?
MRF Environment ForumThe most common processes that use cyanide to extract gold are Merrill-Crowe recovery which uses zinc powder to precipitate the gold from solution, Carbon in Column (CIC), Carbon in Pulp (CIP), Carbon in Leach (CIL) a variation of CIP, and Heap Leaching. The CIP process is currently one of the most favoured in modern large scale mines, a general description of which is provided below.
Related QuestionsHow can cyanide affect human health?
MRF Environment ForumRescuers must protect themselves - wear self-contained breathing apparatus if cyanide gas or dust is present. If the patient's skin or clothes are contaminated handle with care - place clothes in a bin or plastic bag until they can be decontaminated. Look for firm evidence that cyanide poisoning has actually occurred (i.e.
Related QuestionsWhat are cyanide regulation levels?
MRF Environment ForumInternational Chemical Safety Card - Hydrogen Cyanide - A Material Safety Data Sheet (MSDS) for cyanide. USA Agency for Toxic Substances and Disease Registry - Public Health Statement - FAQ on cyanide, non-technical. Environment Writer - Hydrogen Cyanide Chemical Backgrounder - Provides background information on cyanide chemical properties, health effects, and regulations. Environment Australia - National Pollutant Inventory (NPI) - Cyanide compounds.
Related QuestionsWhat's The Real Story On B17 & Cyanide?
B17, LAETRILE & APRICOT SEEDS: World Without CancerRegarding the supposed "Toxicity" of B17][http://www.frot.co.nz/sift/apricots.htm ] The pharmaceutical companies say that apricot kernels are a lethal toxin, yet every example of a toxic reaction reported is that of a malnourished African eating cassava roots. There are many thousands of people eating apricot kernels, but there seems to be a real shortage of dead ones. Cyanide can be highly toxic and even fatal if taken in sufficient quantity.
Related QuestionsWhat are the risks with cyanide and the gold mining industry?
Newmont Mining Corporation - Cyanide FAQ'sThe main risks associated with cyanide are exposure of workers to concentrated hydrogen cyanide gas, leaking of cyanide into the environment and exposure of surrounding communities to cyanide due to accidental releases.
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