Various harmful metals, salts, acids, inorganic alkaline substances and suspended solids, all water pollution caused by contamination called inorganic dye (inorganicpollution). Harmful metals are mainly derived from the sulphide mine drainage of metals such as copper , zinc , arsenic and iron . In addition, mineral yard, yard waste rock, mineral processing plants, smelters, metal refinery waste water, etc., and surface runoff from metal contamination zone. Salts and acids and alkaline substances are mainly from the chemical industry, printing and dyeing industry and metal smelters. Inorganic fouling also from the coal mine waste water and silicic acid, clay and the like to collect.
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