淡水室填充阳离子交换树脂的EDI膜堆对镍离子溶液分离性能的研究

采用淡水室填充阳离子交换树脂的电去离子(EDI)膜堆来处理低浓度含镍废水,考察了该EDI膜堆用于低浓度重金属废水处理的可行性,并探讨了膜堆电压和料液流量对EDI分离重金属离子性能的影响。结果表明,对于Ni2+浓度为50 mg/L,pH为4.5的料液工况,操作电压为25 V,料液处理量为20 L/h时,可保证淡水产水Ni2+浓度在2 mg/L以下,且浓缩水Ni2+浓度大于900 mg/L,电流效率达到24.2%。

Study on the performance of EDI device in dealing with Ni2 solution with dilute departments filled with cation exchange resins

Study on the feasibility of EDI device, whose dilute departments were filled with cation exchange resins and feed water was low concentration Ni₂ solution, for the treatment of low-concentration heavy-metal wastewater. The effects of operating voltage and dilute flow flux on the separation performances EDI processes were investigated. With the feed solution whose Ni₂ concentration was 50 mg?L_-1 and pH was 4.5, the results show that the out dilute Ni₂ concentration was lower than 2 mg.L_-1 and the Ni₂ concentration of out concentrate could higher than 900 mg.L_-1 when operating voltage was 25 v and dilute flow flux was 20 L.h_-1.