pH对高铁酸钾辅助聚合氯化铝去除废水中Cu^(2+)的影响研究

Study on the effect of pH on Cu^(2+) removal from wastewater by potassium ferrate assisted PAC

利用静态试验研究了pH对聚合氯化铝(PAC)、高铁酸钾、高铁酸钾辅助PAC去除废水中Cu2+的影响,并初步探讨了其去除机制。结果表明,PAC、高铁酸钾、高铁酸钾辅助PAC对废水中Cu2+均有较好的去除效果,去除率在70%以上,其中高铁酸钾辅助PAC对Cu2+的去除效果最佳,去除率最大可达94.2%;中性和弱碱性条件下Cu2+的去除率明显高于酸性及强碱性条件,最佳氧化pH与絮凝pH分别为9和8。

Cu2＋ removal from wastewater was performed by using different water treatment agents （PAC,po- tassium ferrate and potassium ferrate assisted PAC）, the effect of pH on Cu2＋ removal efficiency was investigated through the batch static experiments,and the Cu2＋ removal mechanism was preliminarily discussed base on the experi- ment results. The results indicated that the PAC,potassium ferrate and potassium ferrate assisted PAC presented per- fect Cu2＋ removal efficiency with the Cu2＋ removal rate of all more than 70 ~. Among the 3 water treatment agents, potassium ferrate assisted PAC Showed the best Cu2＋ removal efficiency, the Cu2＋ removal rate could reach to 94.2~. The removal rate of Cu2＋ under neutral and weak alkali conditions was much higher than that under strong acid and alkaline conditions. The optimal pH for oxidation and coagulation were 9 and 8 respectively.