Effect of magnesium/calcium ratios in solutions treated by electrodialysis: Morphological characterization and identification of anion-exchange membrane fouling

被引：27

作者：

Casademont, Christophe ^{[1
,2
]}

Pourcelly, Gerald ^{[3
]}

Bazinet, Laurent ^{[1
,2
]}

机构：

[1] Univ Laval, Inst Nutraceut & Funct Foods INAF, Ste Foy, PQ G1K 7P4, Canada

[2] Univ Laval, STELA, Ctr Dairy Res, Ste Foy, PQ G1K 7P4, Canada

[3] Univ Montpellier 2, Inst Europeen Membranes, IEM UMR 5635, CC047, F-34090 Montpellier, France

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2008年 / 322卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

electrodialysis; anion-exchange membrane; fouling; calcium; magnesium;

D O I：

10.1016/j.jcis.2008.02.068

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The present study aimed the characterization of the fouling formed on anion-exchange membrane during electrodialysis treatment of model salt solutions at different Mg/Ca ratio (0, 1/20, 1/10, 115 and 2/5). The membrane fouling was characterized by membrane parameters (membrane thickness and electrical conductivity) and identified by membrane surface analysis (elemental analysis and X-ray diffraction). The mineral deposit was identified as Ca(OH)(2) when no magnesium was present in the model salt. As soon as magnesium was present in the model salt solution for neutral pH(concentrate) conditions a mix between CaCO3 and Ca(OH)(2) was formed. This study is the first one to report the influence of magnesium in solution on the formation of CaCO3 fouling at the interface of anion-exchange membrane during electrodialysis. (c) 2008 Elsevier Inc. All rights reserved.

引用

页码：215 / 223

页数：9

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