The effect of thiourea as a complexing agent on the separation of metallic ions through cation exchange membranes by Donnan dialysis

Donnan dialysis has been investigated in this work in the order to exhibit the influence of the composition of solution on the performance of commercial cation exchange membrane toward metallic ions. Transference fluxes have been determined either as experimental values or calculated according to th...

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Bibliographic Details
Published in:Ionics 2013, Vol.19 (1), p.177-183
Main Authors: Ammi Said, Abdellah, Amara, Mourad, Kerdjoudj, Hacène
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemistry
Energy Storage
Optical and Electronic Materials
Original Paper
Renewable and Green Energy
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Summary:Donnan dialysis has been investigated in this work in the order to exhibit the influence of the composition of solution on the performance of commercial cation exchange membrane toward metallic ions. Transference fluxes have been determined either as experimental values or calculated according to theoretical models. A good agreement between theoretical and experimental flows has been obtained principally in the case of CMV membrane which presents a lower thickness. It has been demonstrated that addition of thiourea causes an increase of separation properties of membrane. The separation is mainly due to the complex formation between Ag + and Cu + ions and thiourea. Monovalent copper ion is obtained after reduction of Cu 2+ and oxidation of thiourea and formation of bisulfide of formamidine which constitute a barrier to monovalent complex transference.
ISSN:0947-7047
1862-0760
DOI:10.1007/s11581-012-0724-x