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首页> 外文期刊>Separation and Purification Technology >Comparative performance of ion exchange membranes for electrodialysis of nickel and cobalt
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Comparative performance of ion exchange membranes for electrodialysis of nickel and cobalt

机译：离子交换膜在镍和钴电渗析中的比较性能

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摘要

The extraction of nickel and cobalt form their sulfate solutions by electrodialysis in a modified three compartment cell is described.Two cation exchange membranes,the perfluorosulfonic Nafion 117 and a new sulfonated PVDF membrane,are compared under similar operating conditions.The membranes are used as either flat structures or as corrugated structures.The effect of flow rate,current density,salt concentration and temperature on the performance of each membrane is descirbed.The performance is characterised in terms of transport properties,current efficiencies and concentrations of metal ions transported through each membrane.The performance of the PVDF membrane was as good,as;if not slightly better,than that of the commercial Nafion 117.A significant improvement with the use of corrugated membraneson the amounts of metal extracted is observed.The corrugated nafion 117 membrane gave superior current efficencies compared to the flat one with the same amountof charged passed.Separation of cobalt from nickel by electrodialysis in mixed solution has also been investigated.
机译：描述了在改良的三室电解槽中通过电渗析从镍和钴中提取硫酸盐溶液的方法。在相似的操作条件下，比较了两种阳离子交换膜，全氟磺酸Nafion 117和新型磺化PVDF膜。讨论了流速，电流密度，盐浓度和温度对每种膜性能的影响。该性能通过传输特性，电流效率和通过各膜传输的金属离子浓度来表征PVDF膜的性能与商用Nafion 117的性能一样好，甚至略有改善。观察到使用波纹膜的显着改善，金属提取量也得到了改善。与通过相同电荷量的扁平电池相比，当前效率。还研究了在混合溶液中通过电渗析法从镍中提取钴的方法。

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