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  • The Mercury Problem in Artisanal and Small‐Scale Gold Mining

    Mercury‐dependent artisanal and small‐scale gold mining (ASGM) is the largest source of mercury pollution on Earth. In this practice, elemental mercury is used 

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  • Gold processing |

    By 2000 bc the process of purifying gold-silver alloys with salt to remove the silver was developed. The mining of alluvial deposits and, later, lode or vein 

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  • Processing, smelting and refining gold | World Gold Council

    More gold is recovered by cyanidation than by any other process. In cyanidation, metallic gold is oxidised and dissolved in an alkaline cyanide solution.

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  • Cyanide Use in Gold Mining - Earthworks

    A sodium cyanide solution is commonly used to leach gold from ore. Because cyanide leaching is very efficient, it allows profitable mining of much lower ore 

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  • Gold cyanidation - Wikipedia

    Gold cyanidation is a hydrometallurgical technique for extracting gold from The expansion of gold mining in the Rand of South Africa began to slow down in the 1880s, as the new deposits being found tended to 

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