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Trends in the small-scale mining of precious . B.N.A. Aryee et al. / Journal of Cleaner Production 11 (2003) 131–140 133 2. Contemporary small-scale mining of precious minerals in Ghana 2.1. Health Effects Of Mercury; On Ghana's Small Scale Miners 'This is the box we use; we put the gold inside and add some chemicals. It gets rid of the impurities inside the gold and gives you the pure gold,' said 27-year-old Abu Quarm, a worker at a small gold mine in Prestea. Mercury Usage in Gold Mining and Why It Is a Problem Subsistence artisanal small-scale gold mining is a way to survive for an estimated 10-15 million miners in 70 countries, including approximately 3 million women and children. Surprisingly and on top of being the world's largest employer in gold mining and representing 90% of the gold mining ... Ning Equipment For Small Scale Gold Mining - . Get Price And Support Online; Small-scale gold mining - high mercury risk, Tanzania . The gold deposits are presently all mined by thousands of small-scale miners.    Read More