... coomercial product that is widely used to precipitate mercury, copper, silver, lead,and other divalent and univilent heavy metals from ... down almost all monovalent and divalent metals such as copper, cadmium, mercury, silver, lead and tin. It can also eliminate ... complexes, so is especially suitable to settle down mercury, copper, cadmium, silver, lead, nickel and tin. Comparing to similar heavy ...