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利用高聚复配絮凝沉淀技术处理湿法炼锌复合重金属废水;基于在聚合硫酸铁的基础上引入活性硅成分,合成聚合硅酸硫酸铁,在此基础上以二甲基二烯丙基氯化铵对其复配改性;考察高聚复配絮凝剂对湿法炼锌废水中Cd、Pb、Zn、As的去除效果及运行工况。结果表明,废水pH调节至8～9,絮凝剂的投加量为0.7 L/m3,能够有效去除湿法炼锌废水中的Cd、Pb、Zn、As,且出水优于铅、锌工业污染物排放标准(GB 25466-2010);处理工艺运行稳定、操作简便。
Polymerization flocculation sedimentation technology using high-zinc compound zinc wet-process wastewater treatment; based on the polymerization of ferric sulfate on the basis of the introduction of active silicon components, the synthesis of polymeric ferric silicate sulfate, based on this to dimethyl diallyl chloride Ammonium nitrate to its compound modification; study high polymer compound flocculant wet-process zinc removal of Cd, Pb, Zn, As removal efficiency and operating conditions. The results showed that the pH of wastewater was adjusted to 8-9 and the dosage of flocculant was 0.7 L / m3, which could effectively remove Cd, Pb, Zn and As from effluent from zinc hydrometallurgy and effluent was better than lead and zinc Emission standards (GB 25466-2010); Treatment process is stable and easy to operate.