CHRONOPOTENTIOMETRIC RESPONSE OF A CATION-EXCHANGE MEMBRANE IN CONTACT WITH CHROMIUM((III)) SOLUTIONS

Authors
TAKY M POURCELLY G GAVACH C ELMIDAOUI A
Citation
M. Taky et al., CHRONOPOTENTIOMETRIC RESPONSE OF A CATION-EXCHANGE MEMBRANE IN CONTACT WITH CHROMIUM((III)) SOLUTIONS, Desalination, 105(3), 1996, pp. 219-228
Citations number
23
Categorie Soggetti
Water Resources","Engineering, Chemical
Journal title
Desalination → ACNP
ISSN journal
00119164
Volume
105
Issue
3
Year of publication
1996
Pages
219 - 228
Database
ISI
SICI code
0011-9164(1996)105:3<219:CROACM>2.0.ZU;2-#
Abstract
The paper deals with the transfer of ionic species containing Cr-III t hrough a CMV cation-exchange membrane. Two electrochemical techniques are used: the chronopotentiometric response and the transport number m easurements. According to the composition of the anodic solution conta ining CrCl3, hydroxyl ion-chromium(III) complex forms enter into the m embrane and water splitting occurs. This phenomenon is attributed to a poisoning of the membrane by these multivalent complex forms which ch ange locally the selectivity of the cation-exchange membrane.