Investigation Into Rejuvenation of Spent Chromium Plating Solutions by Bipolar Membrane Electrodialysis
Investigation Into Rejuvenation of Spent Chromium Plating Solutions by Bipolar Membrane Electrodialysis
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DOI：
10.1149/1.3610214
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发表时间：
2011-09
影响因子：
3.9
通讯作者：
Jie Zhao;Guofeng Cui;Hong Liu
中科院分区：
文献类型：
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作者：
Jie Zhao;Guofeng Cui;Hong Liu
六价铬电镀可以形成装饰性或工程Chrome镀层，但它会产生严重的Cr（VI）污染。镀铬废液的再生和回用可以有效地避免污染物的排放。电渗析是分离废Chrome溶液中杂质阳离子的有效方法。在常规的电渗析堆中，阳离子可沉积在阴极上并且电流效率降低。因此，双极膜电渗析应用于处理混合在Chrome溶液中的作为杂质阳离子的铜（Cu（II））和铁（Fe（III））离子。考察了双极膜电渗析系统中操作条件、膜材料、铬离子浓度等因素对杂质阳离子去除率的影响。结果表明，Cr（VI）浓度是复壮效率的关键因素。
Hexavalent chromium electroplating can form decorative or engineered chrome coatings, however it generates serious Cr (VI) contamination. Rejuvenation and reusage of spent chromium plating solutions can powerfully avoid emission of pollutant. Electrodialysis is an effective method to separate impurity cations mixed in spent chrome solutions. In conventional electrodialysis stacks, cations can be deposited on cathodes and current efficiency is decreased. Thus, the bipolar membrane electrodialysis is applied to dispose the cupric (Cu (II)) and ferric (Fe (III)) ions as impurity cations mixed in chrome solutions. Influencing factors on impurity cations removal efficiency were explored including operation conditions, membrane material, and chromium ion concentration in the bipolar membrane electrodialysis system. The results reveal that Cr (VI) concentration is a critical factor on the efficiency of rejuvenation.