The use of ferrous sulfate to deal with the principle of containing heavy metal ions wastewater

At present, the rapid development of the domestic electronics industry, with the relevant industries with the rapid development of the same time, such enterprises discharged with a large number of heavy metal ions in the amount of waste water has increased significantly. In the electroplating, circuit boards, tannery, mine wastewater discharge is relatively high in heavy metals. Heavy metals and other pollutants is different, it is not easy to be biodegradable, is one of the main source of environmental pollution, and some heavy metal ions are highly toxic. Heavy metal wastewater treatment methods generally use chemical precipitation method. Ferrous sulfate because of its good redox and coagulation decolorization effect is significant, low cost and so on, so we usually use ferrous sulfate for heavy metal wastewater treatment.
After the investigation of our technical staff of ferrous sulfate manufacturers show that ferrous sulfate in the treatment of waste water containing heavy metal ions, ferrous sulfate in the decomposition of waste water in the divalent ferrous ions have a strong redox, Can be part of the heavy metals such as divalent copper ions, hexavalent chromium ions, and so reduced to insoluble material Fe (OH) 3 precipitation. In addition, a ferrous ion is oxidized with dissolved oxygen in the aqueous solution to ferric iron, and the ferric ion is hydrolyzed to form a polynuclear complex and react with the heavy metal contaminants in the water to precipitate and precipitate to form hydroxide. Trivalent iron ions also destroy the hair color groups in the wastewater, have a good decolorizing effect. In the treatment of such waste water ferrous sulfate is through the above chemical reaction mechanism to achieve heavy metal removal agent wastewater decolorization process.
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