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Issue
J. Chim. Phys.
Volume 95, Number 6, June 1998
Page(s) 1475 - 1478
DOI http://dx.doi.org/10.1051/jcp:1998308
DOI: 10.1051/jcp:1998308


J. Chim. Phys. Vol. 95, N°6  p. 1475-1478

Controlled exchange of metallic cations by a polypyrrole-based resin

C. Jérôme1, L. Martinot2, R. Jérôme1, D. Strivay3 and G. Weber3

1  Centre for Education and Research on Macromolecules (CERM), University of Liège, B6 Sart-Tilman, 4000 Liège, Belgium
2  Radiochemistry, University of Liège, B16 Sart-Tilman, 4000 Liège, Belgium
3  Nuclear Physics, University of Liège, B15 Sart-Tilman, 4000 Liège, Belgium

Abstract
This work shows that the binding and the release of Cs +, Ba 2+, La 3+ and Th 4+ cations can be controlled by the application of a potential to a polypyrrole doped with polystyrene sulfonate exchange-resin. Radiometric and nuclear techniques were carried out to characterize the reversibility of the process in relation with the exchanged-cation charge.

Résumé
Ces travaux montrent que la fixation et le relargage des cations Cs +, Ba 2+, La 3+ et Th 4+ peuvent être contrôlés par l'application d'un potentiel à une résine de polypyrrole dopée au polystyrène sulfonate. Des mesures radiométriques (comptage $\alpha$) et nucléaires (rétrodiffusion de Rutherford) ont permis de caractériser la réversibilité du procédé, notamment en fonction de la charge de l'ion échangé.


Key words: ions-exchange resin -- polypyrrole -- metallic cation -- electrochemical control
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