Comparative Study of Electroosmotic Permeability of Ion Exchange Membrane by Volumetric and Gravimetric Methods

IF 2 Q4 CHEMISTRY, PHYSICAL Membranes and Membrane Technologies Pub Date : 2022-06-07 DOI:10.1134/S2517751622030064

E. V. Nazyrova, N. A. Kononenko, S. A. Shkirskaya, O. A. Demina

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引用次数: 1

Abstract

A procedure has been developed for determining the water transport numbers in an ion-exchange membrane by the gravimetric method. Based on a comparative study of this characteristic by the volumetric and gravimetric methods, the experimental conditions (current density, duration of the experiment, and the concentration range of the electrolyte solution) have been found under which the water transport numbers differ by no more than 5%. The electroosmotic permeability, water content, and electrical conductivity of a heterogeneous cation-exchange membrane MK-40 have been studied in a wide range of concentrations of sodium chloride and sulfate solutions. The influence of the nature of the coion on the equilibrium and dynamic hydration characteristics of a heterogeneous membrane has been evaluated. Using the representation of the membrane as a two-phase system, the structure of the hydrated fixed ion–counterion complex has been quantitatively characterized and the hydration numbers of the sulfo group, the sodium counterion, and the sulfate ion in solution have been calculated.

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体积法和重量法对离子交换膜电渗透性的比较研究

提出了一种用重量法测定离子交换膜中水输运数的方法。通过体积法和重量法对这一特性的比较研究，发现在不同的实验条件下(电流密度、实验持续时间和电解质溶液浓度范围)，水输运数的差异不超过5%。在不同浓度的氯化钠和硫酸盐溶液中，研究了异相阳离子交换膜MK-40的电渗透性、含水量和电导率。评价了离子的性质对非均相膜的平衡和动态水化特性的影响。将膜表示为两相体系，定量表征了水合固定离子-反离子配合物的结构，并计算了溶液中磺基、反钠离子和硫酸盐离子的水化数。

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来源期刊

Membranes and Membrane Technologies Multiple-

CiteScore

3.10

自引率

31.20%

发文量

期刊介绍： The journal Membranes and Membrane Technologies publishes original research articles and reviews devoted to scientific research and technological advancements in the field of membranes and membrane technologies, including the following main topics:novel membrane materials and creation of highly efficient polymeric and inorganic membranes;hybrid membranes, nanocomposites, and nanostructured membranes;aqueous and nonaqueous filtration processes (micro-, ultra-, and nanofiltration; reverse osmosis);gas separation;electromembrane processes and fuel cells;membrane pervaporation and membrane distillation;membrane catalysis and membrane reactors;water desalination and wastewater treatment;hybrid membrane processes;membrane sensors;membrane extraction and membrane emulsification;mathematical simulation of porous structures and membrane separation processes;membrane characterization;membrane technologies in industry (energy, mineral extraction, pharmaceutics and medicine, chemistry and petroleum chemistry, food industry, and others);membranes and protection of environment (“green chemistry”).The journal has been published in Russian already for several years, English translations of the content used to be integrated in the journal Petroleum Chemistry. This journal is a split off with additional topics.