电催化氧化-化学沉淀耦合工艺处理化学镀镍废水  

Study on the electrocatalytic oxidation-chemical precipitation coupled process for the advanced treatment of electroless nickel-plating wastewater

作　　者：唐益洲 孟勇[1,2] 崔磊 李建光 

机构地区：[1]湖南师范大学资源循环综合技术研究中心,湖南长沙410081 [2]湖南师范大学化学化工学院资源精细化及先进材料湖南省高校重点实验室,湖南长沙410081 [3]深圳市洁驰环保科技有限公司,广东深圳518000

出　　处：《工业水处理》2017年第5期58-62,共5页Industrial Water Treatment

摘　　要：采用电催化氧化-化学沉淀耦合工艺处理化学镀镍废水。正交实验结果表明,电催化氧化优化条件为:槽电压17.5 V,初始pH为7,NaCl投加量为17 g/L,反应时间为90 min;单因素实验结果表明化学沉淀优化条件:不用调节pH,以CaO为沉淀剂,CaO投加量为3 g/L,反应时间30 min。在此工艺条件下,COD、镍离子、总磷去除率分别为94.48%、99.89%、99.96%,最终出水COD为43 mg/L,镍离子质量浓度为0.08 mg/L,总磷质量浓度为0.24 mg/L,可达到《电镀污染物综合排放标准》(GB 21900—2008)表3中水污染物特别排放限值的要求。The electrocatalytic oxidation-chemical precipitation coupled process has been used for treating electroless nickel-plating wastewater.The orthogonal test analyses show that the optimum conditions of electrocatalytic oxidation are as follows：the cell voltage is 17.5 V,initial pH is 7,NaCl dosage 17 g/L,and reaction time 90 min.The single-factor experiments show that the optimum conditions of chemical precipitation reactions are as follows：without using pH adjustment;while CaO is used as precipitant,the optimum CaO dosage is 3 g/L,and the reaction time 30 min.Under the above operation conditions,the removing rates of COD,nickel ions and total phosphorus could reach 94.48%,99.89%,and 99.96%,respectively,and the final effluent COD is 43 mg/L,mass concentration of nickel ions 0.08 mg/L,and mass concentration of total phosphorus 0.24 mg/L,achieving the special discharge limit values of water pollutants specified in Table 3 of the Comprehensive Discharge Standard for Pollutants from Electroplating（GB 21900—2008）.

关 键 词：化学镀镍废水 电催化氧化 除镍 除磷 

分 类 号：X703.1[环境科学与工程—环境工程]