HU Surong,DENG Sanping,TANG Xi.Study on Electrochemical Oxidation Pretreatment of Cyanide-Containing Electroplating Wastewater[J].Plating & Finishing,2020,(8):43-46.[doi:10.3969/j.issn.1001-3849.2020.08.0090]
含氰电镀废液的电化学氧化预处理研究
- Title:
- Study on Electrochemical Oxidation Pretreatment of Cyanide-Containing Electroplating Wastewater
- 文献标志码:
- A
- 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%、Zn2+去除率99.37%、Cu2+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39 kWh，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。
- Abstract:
- 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 CN- concentration. 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.
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备注/Memo
收稿日期： 2020-02-19；修回日期： 2020-05-06
通讯作者： 胡素荣，Email：hsr129@163.com