Electrolyte transport through amphoteric nanofiltration membranes

被引：56

作者：

Fievet, P ^{[1
]}

Labbez, C ^{[1
]}

Szymczyk, A ^{[1
]}

Vidonne, A ^{[1
]}

Foissy, A ^{[1
]}

Pagetti, J ^{[1
]}

机构：

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

来源：

CHEMICAL ENGINEERING SCIENCE | 2002年 / 57卷 / 15期

关键词：

Donnan partitioning; mass transfer; membranes; nanofiltration; simulation; transport processes;

D O I：

10.1016/S0009-2509(02)00188-4

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The electrolyte transport through amphoteric nanofiltration membranes is investigated using a model based on the application of the extended Nernst-Planck equation coupled with the electroneutrality condition in the membrane, and the assumption of a Donnan equilibrium at both membrane/solution interfaces. The model gives the possibility to distinguish between the different transport mechanisms, namely, convection, diffusion and electromigration. The influence of ion valence, ion diffusion coefficient and permeate volume flux on the different transport mechanisms and electrolyte retention is presented. All calculations are carried out for a membrane with fixed structural parameters (effective pore radius of 2 nm and effective thickness/porosity ratio of 7 mum). (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：2921 / 2931

页数：11

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