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MERCURY CYANIDE CONTAMINATION OF GROUNDWATER FROM GOLD ... used to extract gold, mercury cyanide complexes that form enhance mercury mobility and increase mercury concentrations ... concentration de celui-ci dans la nappe phréatique. Dans un cas particulier, ceci a mené à la contamination de la réserve ...

Gold extraction by chlorination using a pyrometallurgical process. Author links open overlay panel M.W. Ojeda a E. Perino b M. del C. Ruiz a. ... One of the most widely used chlorinating agents for gold recovery is calcium chloride. ... being C 0 the initial gold concentration in the sample (m 2), C f final gold concentration in chlorination ...

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Much gold is recovered from ores that are low in gold concentration using a cyanide extraction process. Cyanide extraction was first used around 1887, when the MacArthur-Forrest Process was developed in Glasgow by John Stewart MacArthur.

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Gold Cyanide Solution (Leaching Gold With Cyanide) Since the 1890's, cyanide has been used to recover gold from gold bearing ores. And today, over 115 years later, most of the worlds gold is recovered with cyanide playing a large part in the beneficiation of the yellow precious metal.

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a small volume of solution with a high gold concentration. The gold is recovered from this solution by electrowinning, zinc precipitation or refining technology such as the Mintek Minataur process. ... The process design of gold leaching and carbon-in-pulp circuits

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