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Experimental research on acidic heavy metal wastewater treatment in one non-ferrous metal mine

Liu Qiang;Wang Ying;Liu Huali;Changchun Gold Research Institute;  
This paper adopts reverse osmosis membrane treatment process to dispose the acidic heavy metal wastewater from a non-ferrous mine,and experimental study on the concentrate solution produced was conducted by neutralization,direct sulfuration,single-stage neutralization and sulfuration,neutralization residue recycling and sulfuration,and iron reduction and sulfuration,respectively.The results show that reverse osmosis membrane technique performs well in the separation and concentration of acidic heavy metal wastewater from non-ferrous mines;the product water reaches emission standard after adjusting pH;neutralization and sulfuration method or iron reduction and sulfuration method is suitable for concentrate solution in recovering copper ions;the precipitation sludge obtained from single-stage neutralization and sulfuration has high valuational grade;neutralization residue recycling and sulfuration method can save the consumption of lime and the copper in precipitation sludge has high valuational grade,showing prominent comprehensive advantages.
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