REJECTION OF MINERAL SALTS ON A GAMMA-ALUMINA NANOFILTRATION MEMBRANE APPLICATION TO ENVIRONMENTAL PROCESS

被引：67

作者：

ALAMIYOUNSSI, S ^{[1
]}

LARBOT, A ^{[1
]}

PERSIN, M ^{[1
]}

SARRAZIN, J ^{[1
]}

COT, L ^{[1
]}

机构：

[1] ECOLE NATL SUPER CHIM MONTPELLIER,MAT & PROC MEMBRANAIRES LAB,CNRS,UMR 9987,UM 2,F-34053 MONTPELLIER 1,FRANCE

来源：

JOURNAL OF MEMBRANE SCIENCE | 1995年 / 102卷

关键词：

CERAMIC MEMBRANES; NANOFILTRATION; SALT FILTRATION;

D O I：

10.1016/0376-7388(94)00302-F

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Nanofiltration of salt solutions through an alumina membrane prepared by a sol gel process was investigated: rejections depend on the charge of the ions and decrease in the order: (divalent cation, monoanion)>(monocation, monoanion) or (dication, dianion)>(monocation, dianion). The surface charge of the membrane in the investigated solutions was shown to be positive over a very large pH range. The rejection of ionic species can be rationalised by taking into account the low pore diameters of the membrane and its surface charge: as in the case of organic nanofiltration membranes, the rejection mechanism depends on the relative ratio of the coulombic, dielectric and hydration interactions between the membrane material and the ionic species. The use of nanofiltration through the alumina nanofiltration membrane for denitration of water is also presented.

引用

页码：123 / 129

页数：7

共 12 条

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