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mercury in gold ore artisanal amalgamation

mercury in gold ore artisanal amalgamation

Nov 01, 2012 Mercury amalgamation has been used for centuries to process precious metals. 4 Today, ASGM is the world’s second greatest source of atmospheric mercury pollution after coal combustion, according to the United Nations Environment Programme (UNEP). 5 And with gold prices now exceeding US$1,600 per ounce (up from less than US$500 in the 1980s ...

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