Abstract
The adsorption of chloride, bromide, and iodide complexes of aluminum, gallium, and indium on the liquid/gas interface activated by cetylpyridinium chloride, a cationic surfactant, was studied. The thermodynamic constants of the exchange of halide complexes with the chloride ion and the changes of thermodynamic functions for the ion-exchange adsorption on a floating air bubble surface activated by a cationic surfactant were calculated. The selectivity of exchange adsorption was found to grow with a decrease in the energy of the hydration of anionic complexes. The possibility of the selective flotation recovery of gallium and indium halide complexes from diluted solutions was shown.
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