应用电渗析技术,可以有效降低化学镀镍成本,减少环境污染.采用3种离子交换膜对某化学镀镍厂的废液进行电渗析再生处理,通过测定HPO32-的去除率,以及Ni2+和H2PO2-的损失率,确定其中一种交换膜在脱盐率及对HPO32-和H2PO2-的选择性方面更好.并以此种性能较好的离子交换膜进行试验,研究了电流密度对镀镍废液中HPO32-,Ni2+和H2PO2-的去除(损失)率的影响.结果表明,电流密度在65 mA/cm2时,镀镍废液的再生效果最好.
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