Correction of pH of diluted solutions of electrolytes by electrodialysis with bipolar membranes

被引：10

作者：

Zabolotskii, V. I. ^{[1
]}

Utin, S. V. ^{[1
]}

Shel'deshov, N. V. ^{[1
]}

Lebedev, K. A. ^{[1
]}

Vasilenko, P. A. ^{[1
]}

机构：

[1] Kuban State Univ, Krasnodar 350751, Russia

来源：

RUSSIAN JOURNAL OF ELECTROCHEMISTRY | 2011年 / 47卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

electrodialysis; bipolar membrane; correction of the pH of a dilute solution; water dissociation; current efficiency; transport numbers; voltage-current characteristic; deprotonation of amino groups; mathematical model; WATER;

D O I：

10.1134/S1023193511030141

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The current efficiencies of the water dissociation water and the voltage-current characteristics of the bipolar (asymmetric bipolar) membranes were measured in a two-chamber electrochemical cell. The cell was formed of an MB-3 bipolar membrane or an asymmetric bipolar membrane, which is an MA-40 heterogeneous membrane with a thin surface layer in the form of a cation-selective homogeneous film and MA-40 and MA-41 heterogeneous monopolar membranes. The dissociation of water on MA-40 in 0.01 M sodium chloride decreased the current efficiency of the acid and alkali both in the channel with a bipolar membrane and in the channel with an asymmetric bipolar membrane. The effective ion transport numbers across MA-40 and MA-41 at different pH values were determined. The water dissociation rate on MA-40 decreased at pH > 9.5. A kinetic model of the electrodialysis of a dilute solution of sodium chloride in a two-chamber unit cell with a bipolar and anionite membranes was suggested.

引用

页码：321 / 326

页数：6

共 26 条

[1] Electrochemical acidification of milk by whey desalination [J].