Anion-exchange membranes for separation of borates by Donnan dialysis

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• 作者：Marek Bryjak ; ^{marek.bryjak@pwr.wroc.pl} ; Ilona Duraj
• 关键词：Grafted membranes ; Polyethyleneimine ; Multilayer polyelectrolyte ; Boron removal
• 刊名：Desalination
• 出版年：2013
• 出版时间：1 February, 2013
• 年：2013
• 卷：310
• 期：Complete
• 页码：39-42
• 全文大小：184 K

文摘

Preparation and properties of anion-exchange membranes for Donnan dialysis of borates were described. It was shown that grafting of polyethyleneimine to surface of Celgard 2500 membrane resulted in preparation of well-permeable membranes. Fluxes of NaCl and Na₂SO₄ through new membranes were larger than flux of the same salts across commercial FumaTech anion-exchange membranes. However, the collapse of polyethyleneimine chains, generated by higher ionic strength of solution, caused poor selectivity of the grafted membranes and their malfunctioning in the Donnan dialysis process.