电絮凝-超滤组合技术处理含铜废水

Removal of copper from wastewater by hybrid electrocoagulation and ultrafiltration processes

采用电絮凝-超滤(electrocoagulation-ultrafiltration,EC-UF)组合技术对含铜废水中的铜离子进行了处理实验研究。讨论了电流密度、初始pH、初始铜浓度和初始电导率等因素对铜的去除效果和膜污染的影响,并分析了这些影响因素对EC-UF组合技术效率的作用机制。结果表明,在电流密度J=50 A·m^(-2)、初始铜浓度C(Cu^(2+_)≤40 mg·L^(-1)、初始pH=4~8、初始电导率σ=2 m S·cm^(-1)、电解时间20 min的条件下,废水中铜的去除率达到99.6%并有效的减缓了膜污染。本研究为EC-UF组合技术除铜的实践应用提供了科学依据。

This study investigated the performance of copper removal from synthetic model wastewater by hybrid electroeoagulation and ultrafihration processes （EC-UF）. The effects of current density, initial pH, initial copper concentration, solution conductivity, and other factors on the removal of copper and membrane-fouling were stud- ied, and the influence mechanism of these factors on EC-UF efficiency was analyzed. The copper removal rate was found to reach 99.6% , and membrane-fouling was effectively alleviated at a current density of 50 A · m-2, initial C（Cu2＋） ≤40 mg · L-1, initial pH of 4 to 8, solution conductivity of 2 mS · cm- 1 , and electrolysis time of 20 min. These results provide a scientific basis for further research on EC-UF removal of copper ions.