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Modified membranes applied to metallic ion separation and mineral acid concentration by electrodialysis

机译:改性膜通过电渗析应用于金属离子分离和无机酸浓缩

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Two modified membranes are used for the treatment of industrial effluent by electrodialysis. This surface modification of membrane using both immersion and electrodeposition method improves the selectivity for monovlent ions against to divalent. In this work both neutralisation of the effluent and acid enrichment are achieved. The immersion method appears more efficient when not more than two compounds are inside the solution. On the other hand, electrodeposition technique should be used allowing to attain 2.8 N acid concentration. It was noticed that polyethyleneimine plays two different roles according to the modification method. The multilayer was formed by adsorption using immersion method though electrodeposition technique permits PEI to penetrate into the pores and play a role of an effective carrier for proton.
机译:两种改性膜用于通过电渗析处理工业废水。使用浸没和电沉积方法对膜进行这种表面改性,可以提高单价离子对二价离子的选择性。在这项工作中,可以实现废水的中和和酸富集。当溶液中的化合物含量不超过两种时,浸没法显得更有效。另一方面,应使用电沉积技术以使酸浓度达到2.8N。注意到根据改性方法,聚乙烯亚胺起两种不同的作用。尽管电沉积技术允许PEI渗透到孔中并充当质子的有效载体,但使用浸入法通过吸附形成了多层膜。

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