Supercritical carbon dioxide extraction of caesium from aqueous solutions in the presence of macrocyclic and fluorinated compounds

Supercritical fluid extraction of caesium, potassium and sodium from aqueous solutions in the presence of dicyclohexano-21-crown-7, pentadecafluoro-n-octanoic acid (PFOA) and tetraethylammonium perfluoro-1-octanesulfonate (TPFOS) has been investigated at different temperatures of supercritical carbon dioxide, ratios between reagent concentrations and initial concentrations of caesium in the solution.