Abstract Mercury (Hg) is a unique heavy metal toxicant found in numerous environmental and occupational settings. A major source of environmental Hg is artisanal and small-scale gold mining. whereby metallic mercury (Hg0) is used to concentrate gold from mined ore. If the Hg0-contaminated tailings are then subjected to cyanidation to extract any remaining gold. https://allfixelectricales.shop/product-category/vacuum-speed-control-cover/