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Secondary Crusher Changsha Crusher Whether To Permit

This thesis determines that over four hundred thousand artisanal and small-scale gold miners all over China systematically use amalgamation and release approximately 240 tonnes of mercury per annum. Artisanal and small-scale gold mining ASGM is one of the largest sources of mercury pollution in China. This thesis outlines an approach to investigating ASGM in China based on a series of three