Controlled exchange of metallic cations by a polypyrrole-based resin

This work shows that the binding and the release of Cs+, Ba2+, La3+ and Th4+ cations can be controlled by the application of a potential to a polypyπole 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.