硫酸铁、聚合硫酸铁混凝处理含锌镉废水的研究

Study on Removal of Zn^2＋ and Cd^2＋ from Waste Water Using Ferric Sulfate and Polymeric Ferric Sulfate as Coagulatant

文章实验研究了硫酸铁、聚合硫酸铁对同时含Zn^2＋、Cd^2＋废水处理的条件和效果，确定了处理的最佳pH值、絮凝剂最佳用量和最佳絮凝时间。结果表明：该工业废水用硫酸铁或聚合硫酸铁处理均可收到良好的效果；用硫酸铁或聚合硫酸铁处理该工业废水的最佳条件为：pH=7.0，絮凝时问为30min，絮凝剂用量分别为：硫酸铁：0.6g／L，聚合硫酸铁：0.4g／L。

The conditions and results of removing Zn^2＋ and Cd^2＋ from waste water using ferric sulfate and polymeric ferric sulfate as coagulant were experimentally studied; and the optimum reaction conditions including the pH , the dose of coagulants, the time of coagulating reaction was obtained. Results showed that treating that waste water using ferric sulfate or polymeric ferric sulfate as coagulant had a high removal efficiency of Zn^2＋ and Cd^2＋ ; and that the optimum reaction conditions were as follows： pH=7.0, coagulating reaction period was 30 min, dosage of ferric sulfate was 0.6g/L, dosage of polymeric ferric sulfate was 0.4g/L.