硫化钠沉淀法处理化学镀镍废液  

TREATMENT OF WASTE LIQUOR OF ELECTROLESS NICKEL-PLATING BY SODIUM SULFIDE PRECIPITATION

作　　者：刘富强 朱兆华 邓华利 

机构地区：[1]深圳市东江环保股份有限公司,广东深圳518034

出　　处：《环境工程》2008年第S1期142-143,155,共3页Environmental Engineering

摘　　要：采用化学沉淀法处理化学镀镍废液,以硫化钠为沉淀剂,将废液的镍离子以硫化镍的形式析出,从而达到净化废液和回收镍的目的。实验结果分析表明,在影响镍去除率效果的几个因素中硫化钠投加量的影响最大,pH值次之,反应时间影响最小。在pH为6,投加200 mL质量分数为20%的硫化钠溶液,反应时间为30 min,可以使200 mL化学镀镍废液中(镍质量浓度为5450 mg/L)的镍去除率达到99.8%,残余镍的质量浓度可以降至12 mg/L左右,对其余重金属离子的去除也有明显的效果。同时得到的沉淀致密,镍含量高(质量分数为21.6%),便于进一步回收利用。Sodium sulfide was used in the precipitation treatment of waste liquor of electroless nickel-plating.The effects of dosing agent quantity,reaction time and pH on the treatment efficiency were studied.The results showed that the mass concentration of nickel could be reduced from 5450 mg/L to below 12 mg/L under the conditions of pH=6,reaction time=30 min.The removal efficiency of nickel was more than 99%.The tests show that the sodium sulfide precipitation treatment process is an economic,simple and efficient method to treat the waste liquor of electroless nickel-plating.

关 键 词：化学镀镍废液 硫化钠沉淀法 硫化镍 

分 类 号：X781.1[环境科学与工程—环境工程]