络合-超滤-纳滤耦合工艺处理铜电镀工业废水

Treatment of copper electroplating wastewater by the coupling process of complexation-ultrafiltration-nanofiltration

以废水处理和金属回用为目的,研究了络合—超滤—解络—纳滤耦合过程处理铜电镀工业废水。利用聚丙烯酸钠(PAAN)为络合剂处理含Cu2+的电镀废水,讨论了pH、体积浓缩因子等对超滤过程的影响,以及解络、纳滤过程和络合剂再生回用性能。试验研究表明,在络合过程对Cu2+可达到98%的去除,在解络过程对Cu2+的回收率仍可达到96%以上。经过纳滤浓缩的铜电镀废水,可回收铜金属,而滤过液可达到回用水的标准。

For wastewater treatment and reuse of metal, the copper electroplating wastewater treatment by the coupled process of complexation-uhrafihration--decomplexation-nanofihration has been studied. Using sodium polyacrylate （PAAN） as complexing agent and Cu2＋ containing electroplating wastewater,the effects of various factors,such as the pH and concentration genes on the uhrafihration process, on the regeneration properties of decomplexation, nanofiltration processes,and on the complex agent regeneration properties,are discussed. The study shows that 98% of Cu~ can be removed in the complex process and 96% of Cu2＋ can be recovered in the process of decomplexation. After NF concentration,copper metal in copper electroplating wastewater can be recycled,and,at the same time,the permeated solution can reach the requirement of standard of recycled water.