Electrochemical Desalination Using Bi/BiOCl Electrodialysis Cells
Electrochemical Desalination Using Bi/BiOCl Electrodialysis Cells
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DOI：
10.1021/acssuschemeng.8b03906
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发表时间：
2018-10
影响因子：
8.4
通讯作者：
Do-Hwan Nam;Kyoung-Shin Choi
中科院分区：
文献类型：
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作者：
Do-Hwan Nam;Kyoung-Shin Choi
为了实现更经济有效的海水淡化，研究了由铋电极和氯化铋电极组成的新型电渗析(ED)电池。通过将铋氧化成BiOCl2和将BiOCl2还原成BiOCl2分别作为阳极和阴极反应，使平衡槽电压降低到0V，从而使BiOClED槽的工作电压比现有的ED槽显著降低。构建了两室和三室的ED池，并对其结构和工作原理进行了详细的说明。分析了含不同电解液的电解槽的电化学性能和海水淡化性能，考察了电解槽结构和电解液的pH值对操作电压以及对Cl-和Na+的去除效率的影响。本研究提供的结果和讨论将有助于进一步开发用于海水淡化、废水处理和环境保护的BiOClED电池。
The construction of new types of electrodialysis (ED) cells composed of Bi and BiOCl electrodes were investigated to achieve more cost-effective desalination using ED. By using the oxidation of Bi to BiOCl and the reduction of BiOCl to Bi as the anode and cathode reactions, respectively, the Bi/BiOCl ED cells decreased the equilibrium cell voltage to 0 V. As a result, the operating voltage of the Bi/BiOCl ED cells could be significantly lowered compared with the current ED cells. Two-compartment and three-compartment ED cells were constructed and their configurations and operating principles were explained in detail. The electrochemical and desalination performances of these cells containing different electrolytes were analyzed to examine the effects of the cell configuration and pH of the electrolytes on the operating voltage as well as Cl– and Na+ removal efficiencies. The results and discussion provided in this study will enable further development of Bi/BiOCl ED cells for use in desalination, wastewat...