Removal of some divalent cations from water by membrane-filtration assisted with alginate

被引：75

作者：

Fatin-Rouge, N ^{[1
]}

Dupont, A ^{[1
]}

Vidonne, A ^{[1
]}

Dejeu, J ^{[1
]}

Fievet, P ^{[1
]}

Foissy, A ^{[1
]}

机构：

[1] Univ Besancon, Lab Chim Mat & Interfaces, F-25030 Besancon, France

来源：

WATER RESEARCH | 2006年 / 40卷 / 06期

关键词：

ultrafiltration complexation; polymer-assisted filtration; wastewater treatment; water softening; metal removal; alginate;

D O I：

10.1016/j.watres.2006.01.026

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The removal of divalent metal ions from hard waters or galvanic wastewater by polymer-assisted membrane filtration using alginate was investigated. The ability of this natural polymer to form aggregates and gels in presence of metal ions was studied, in order to carry out metal removal by ultra or micro-filtration. Alginate titrations have shown the presence of amine groups in addition to carboxylates onto the polymer backbone. The binding properties of alginate with divalent cations have been studied, showing an increasing affinity for Ca2+ over Mg2+ as polymer concentration increases, and the relative affinity Pb2+ >= Cu2+ > Zn2+ > Ni2+. The softening of hard natural waters was achieved successfully and easily, but needs an optimal alginate concentration similar to 4 x 10(-2) M. The alginate powder can be directly added to hard waters. Except for Ni2+, metal-removal was efficient. Polymer regeneration has shown that Cu2+-complexes are labiles. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1303 / 1309

页数：7

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