FTIR spectroscopic study of the structure of water cavities of mixed micelles during the extraction of anionic gold and platinum complexes

Resumo

FTIR spectroscopy is used to study the distribution of bulk (free) and hydration (bound) water during the extraction of Au(III) and Pt(IV) from acid sulfate-chloride media by reverse micelles consisting of non-ionic (Triton N-42) and anionic (AOT) surfactants. It is shown that the bulk water fraction increases with an increase in the anionic AOT concentration and that of hydration water increases with an increase in the non-ionic Triton N-42 concentration. A decrease in the bulk water fraction and an increase in the hydration water content enhance the extraction capacity of mixed micelles.