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铬是一种银白色有光泽、坚硬而耐腐蚀的金属,它以二价、三价、六价的化合物形成存在,在天然水源中一般不存铬,如发现铬则多系由于工业废水所污染。产生铬化合物三废的,有铬矿石开采,如铬铁矿、用含铬矿石制造铬化物,用铬铁矿石炼钢等;使用铬化物的工业,如铬酸酐在机械、汽车、航空、
Chromium is a silvery white shiny, hard and corrosion-resistant metal, which exists as a divalent, trivalent, hexavalent compound. There is no chromium in natural sources. If chromium is found, Pollution. Chromium compounds produced three waste, the exploitation of chromium ore, such as chromite, chromium ore with chromium ore, with chromite steel, etc .; use chromium industry, such as chromic anhydride in machinery, automotive, aerospace,