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Related Experiment Video

Updated: May 2, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

Effect of concentration polarization on permselectivity.

Ramadan Abu-Rjal¹, Vahe Chinaryan¹, Martin Z Bazant²

¹Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus 84990 Israel.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|March 4, 2014

Summary

This summary is machine-generated.

Concentration polarization significantly impacts ion exchange membrane permselectivity. This study analyzes effects on homogeneous and heterogeneous membranes, revealing key factors influencing ion transport and system performance.

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Last Updated: May 2, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

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Spatial Separation of Molecular Conformers and Clusters

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Published on: January 9, 2014

Area of Science:

Electrochemistry
Membrane Science
Physical Chemistry

Background:

Ion exchange membranes (IEMs) are crucial in separation processes.
Permselectivity of IEMs can be affected by concentration polarization.
Understanding these effects is vital for optimizing membrane performance.

Purpose of the Study:

To systematically analyze the variation of permselectivity during concentration polarization.
To investigate the impact of concentration polarization on both homogeneous and heterogeneous IEMs.
To develop an analytical model for ionic transport in heterogeneous membranes.

Main Methods:

Analysis of a three-layer membrane system (IEM flanked by diffusion layers).
Development of an ionic transport model for heterogeneous membranes.
Reduction of the transport problem to solving a single algebraic equation for counterion transport number.

Main Results:

Concentration polarization significantly affects permselectivity for both membrane types.
Effects include non-uniform co-ion diffusion flux and varying membrane-solution interface concentration.
Flux focusing in heterogeneous membranes influences interface concentration.

Conclusions:

Concentration polarization is a critical factor influencing IEM permselectivity.
The proposed model provides analytical insights into heterogeneous membrane behavior.
Understanding these phenomena is key for designing efficient membrane systems.