Influence of the nature of cation on water splitting at the interface of a cation exchange membrane during electrodialysis

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Output type: Journal article

UM6P affiliated Publication?: No

Author list: Taky M., Elmidaoui A., Pourcelly G., Gavach C.

Publisher: EDP Sciences

Publication year: 1996

Journal: Journal de Chimie Physique et de Physico-Chimie Biologique (0021-7689)

Volume number: 93

Issue number: 2

Start page: 386

End page: 401

Number of pages: 16

ISSN: 0021-7689


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The phenomenon of water splitting occuring at the interface of a Selemion CMV cation exchange membrane in contact with solutions containing successively monovalent, divalent and trivalent cations was investigated. Under identical hydrodynamic conditions, this investigation is based on recording j-V curves, measurement of transport numbers and pH variations. Water splitting is not a direct consequence of concentration polarization phenomenon. The cation nature and especially its acidic character is an important parameter which explains the difference in the behavior of the Selemion CMV membrane in contact with solutions of different cations.


Acidic character of cations, Cation exchange membrane, Polarization of concentration, Water splitting


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