Competing Transport of Malonic and Acetic acids across Commercial and Modified RALEX AMH Anion-Exchange Membranes

被引：4

作者：

Karpenko, T. V. ^{[1
]}

Kovalev, N. V. ^{[1
]}

Kirillova, K. R. ^{[1
]}

Achoh, A. R. ^{[1
]}

Melnikov, S. S. ^{[1
]}

Sheldeshov, N. V. ^{[1
]}

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

机构：

[1] Kuban State Univ, Krasnodar 350040, Russia

来源：

MEMBRANES AND MEMBRANE TECHNOLOGIES | 2022年 / 4卷 / 02期

基金：

俄罗斯科学基金会;

关键词：

anion-exchange membrane; double-layer membrane; acetic acid; malonic acid; current-voltage characteristic; electrodialysis separation; SELECTIVE ION SEPARATION; LACTIC-ACID; BIPOLAR MEMBRANES; ORGANIC-ACIDS; CITRIC-ACID; FERMENTATION BROTH; ELECTRODIALYSIS; RECOVERY; PERMSELECTIVITY; PURIFICATION;

D O I：

10.1134/S2517751622020056

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 current-voltage characteristics of a Ralex AMH anion-exchange membrane and a Ralex AMH/MF-4SK double-layer membrane in solutions of acetic and malonic acids and the permselectivity coefficients of these acids across the two membranes in a pH range of 1-8 at an electric current density of 0-5 A/dm(2) have been measured. It has been shown that the Ralex AMH anion-exchange membrane exhibits a preferential selectivity with respect to malonic acid in the entire ranges of pH and current densities. The Ralex AMH/MF-4SK double-layer membrane is selective with respect to acetic acid at all pH values and at current densities lower than the limiting electrodiffusion current. At currents above the limiting current, this membrane is selective with respect to malonic acid. The permselectivity coefficient value is explained by the occurrence of two competing processes: the dissociation of water molecules, which accelerates at membrane currents above the limiting current, and the protonation-deprotonation process involving ions and molecules of malonic and acetic acids.

引用

页码：118 / 126

页数：9

共 53 条

[1] An economic evaluation of the fermentative production of lactic acid from wheat flour [J].