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聚苯胺对MK-40膜进行表面改性对电渗析过程中结垢的影响。

Influence of Surface Modification of MK-40 Membrane with Polyaniline on Scale Formation under Electrodialysis.

作者信息

Andreeva Marina A, Loza Natalia V, Pis'menskaya Natalia D, Dammak Lasaad, Larchet Christian

机构信息

Physical Chemistry Department, Faculty of Chemistry and High Technologies, Kuban State University, 149 Stavropolskaya st., 350040 Krasnodar, Russia.

Institut de Chimie et des Matériaux Paris-Est (ICMPE) UMR 7182 CNRS, Université Paris-Est, 2 Rue Henri Dunant, 94320 Thiais, France.

出版信息

Membranes (Basel). 2020 Jul 7;10(7):145. doi: 10.3390/membranes10070145.

DOI:10.3390/membranes10070145
PMID:32646071
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7407481/
Abstract

A comprehensive study of the polyaniline influence on mineral scaling on the surface of the heterogeneous MK-40 sulfocationite membrane under electrodialysis has been conducted. Current-voltage curves and chronopotentiograms have been obtained and analyzed for the pristine MK-40 membrane and the MK-40 membrane which is surface-modified by polyaniline. The study of the electrochemical behavior of membranes has been accompanied by the simultaneous control of the pH of the solution outcoming from the desalination compartment. The mixture of NaCO, KCl, CaCl, and MgCl is used as a model salt solution. Two limiting states are observed on the current-voltage curve of the surface-modified membrane. There is the first pseudo-limiting state in the range of small values of the potential drop. The second limiting current is comparable with that of the limiting current for the pristine membrane. It is shown that chronopotentiometry cannot be used as a self-sufficient method for membrane scaling identification on the surface-modified membrane at high currents. A mineral scale on the surfaces of the studied membranes has been found by scanning electron microscopy. The amount of precipitate is higher in the case of the surface-modified membrane compared with the pristine one.

摘要

开展了一项关于聚苯胺对电渗析过程中异质MK - 40磺化阳离子交换膜表面矿物结垢影响的综合研究。已获取并分析了原始MK - 40膜以及经聚苯胺表面改性的MK - 40膜的电流 - 电压曲线和计时电位图。在研究膜的电化学行为的同时，还对脱盐隔室流出溶液的pH值进行了同步监测。使用NaCO、KCl、CaCl和MgCl的混合物作为模拟盐溶液。在表面改性膜的电流 - 电压曲线上观察到两种极限状态。在电位降较小的值范围内存在第一个伪极限状态。第二个极限电流与原始膜的极限电流相当。结果表明，在高电流下，计时电位法不能作为一种自给自足的方法来识别表面改性膜上的膜结垢情况。通过扫描电子显微镜发现了所研究膜表面的矿物垢。与原始膜相比，表面改性膜的沉淀量更高。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/f640b12a41d1/membranes-10-00145-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/cf7620653289/membranes-10-00145-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/576a1b161b9c/membranes-10-00145-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/9a00f3ab3d6c/membranes-10-00145-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/e6432a32c87a/membranes-10-00145-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/737a494b5e20/membranes-10-00145-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/7eb23a25f0e9/membranes-10-00145-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/c74361610f4e/membranes-10-00145-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/f640b12a41d1/membranes-10-00145-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/cf7620653289/membranes-10-00145-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/576a1b161b9c/membranes-10-00145-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/9a00f3ab3d6c/membranes-10-00145-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/e6432a32c87a/membranes-10-00145-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/737a494b5e20/membranes-10-00145-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/7eb23a25f0e9/membranes-10-00145-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/c74361610f4e/membranes-10-00145-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/09a4/7407481/f640b12a41d1/membranes-10-00145-g008.jpg

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