Metal ion extraction in microheterogeneous systems

Metal ion extraction in microheterogeneous systems (micelles, vesicles and polymeric micelles) research works are reviewed taking into account both the studies of the extraction equilibrium and the extraction kinetics. Dealing with the extraction equilibrium, beyond the principles governing its implementation and potential applications, light is thrown on two particular points: (i) the comparison of the means by which the pseudophases separation may be carried out and (ii) the stoichiometries of the complexes formed in the micelles. Kinetics studies are reviewed with the purpose of describing the specificities brought by microheterogeneous systems in the field of metal ion extraction, a focus being made on the specific interaction the surfactant molecules may have with one of the reacting species.