含氰电镀废液的电化学氧化预处理研究  

Study on Electrochemical Oxidation Pretreatment of Cyanide-Containing Electroplating Wastewater

作　　者：胡素荣[1] 邓三平[1] 唐曦 HU Surong;DENG Sanping;TANG Xi(Institute of Mechanical Manufacturing Technology,China Academy of Engineering Physics,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院机械制造工艺研究所,四川绵阳621900

出　　处：《电镀与精饰》2020年第8期43-46,共4页Plating & Finishing

摘　　要：针对含氰电镀废液的处理问题,采用直流电解预处理方法,研究了阴极材料、电解电流及时间和电解质种类及添加量对CN-及金属离子去除率和槽电压的影响。结果表明,在阴极采用不锈钢、电解电流3.0 A、电解时间8 h、氯化钠浓度为CN-浓度两倍的条件下,CN-去除率99.99%、Zn^2+去除率99.37%、Cu^2+去除率99.76%、电解槽电压5.2 V。预处理能耗为处理每千克CN-耗电约39kWh,预处理后的废水可以直接进入废水处理系统再处理。该方法为高浓度含氰电镀废液的处理提供了借鉴。The treatment method of cyanide-containing electroplating wastewater was studied.The influences of cathode material,electrolysis current and time,electrolyte type and amount on the removal rates of CN-and metal ion,as well as the cell voltage were studied by DC electrolysis pretreatment method.The results showed that the removal rates of CN^-,zinc ion and copper ion were 99.99%,99.37% and 99.76% respectively,and the cell voltage was 5.2 V under the condition of using stainless steel as the cathode,electrolysis current of 3.0 A,electrolysis time of 8 h and NaCl concentration was twice the CNconcentration.The energy consumption of pretreatment was about 39 kWh per kilogram of CN^-,and the pretreated wastewater could be directly treated in the wastewater treatment system.This method provides a reference for the treatment of high concentration cyanide-containing electroplating wastewater.

关 键 词：含氰电镀废液 电化学氧化 预处理 

分 类 号：X703[环境科学与工程—环境工程]