“…3 The heavy metals comprise mercury, arsenic, cadmium, chromium, lead, Copper, Cobalt, Zinc, Iron, and Nickel. 4 These are categorized into three classes; radionuclides (include U, Ra, Th, Am, etc. ), toxic metals (include Cr, Hg, Pb, Cu, Sn, Zn, Ni, As, Cd, Co, etc.…”