Improvement of Selectivity of RALEX-CM Membranes via Modification by Ceria with a Functionalized Surface

Ion exchange membranes are widely used for water treatment and ion separation by electrodialysis. One of the ways to increase the efficiency of industrial membranes is their modification with various dopants. To improve the membrane permselectivity, a simple strategy of the membrane surface modifica...

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Detalles Bibliográficos
Autores principales: Stenina, Irina, Yurova, Polina, Achoh, Aslan, Zabolotsky, Victor, Wu, Liang, Yaroslavtsev, Andrey
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9919321/
https://www.ncbi.nlm.nih.gov/pubmed/36771946
http://dx.doi.org/10.3390/polym15030647
Descripción
Sumario:Ion exchange membranes are widely used for water treatment and ion separation by electrodialysis. One of the ways to increase the efficiency of industrial membranes is their modification with various dopants. To improve the membrane permselectivity, a simple strategy of the membrane surface modification was proposed. Heterogeneous RALEX-CM membranes were surface-modified by ceria with a phosphate-functionalized surface. Despite a decrease in ionic conductivity of the prepared composite membranes, their cation transport numbers slightly increase. Moreover, the modified membranes show a threefold increase in Ca(2+)/Na(+) permselectivity (from 2.1 to 6.1) at low current densities.

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