Studies on the sorption behavior of Arsenazo-I, U(VI) and Th(IV) species from aqueous solutions of Arsenazo-1 on different types of ion exchangers

Three different types of ion exchangers namely Dowex-50 WX8, AG-2X8 and Chelex-100 are used to study the sorption behavior of Th(IV) and U(VI)from solutions of Arsenazo-I. The sorption behavior of Arsenazo-I itself is also studied. Possible species sorbed on these resins or present in solutions of U(VI)- and Th(IV)-Arsenazo-I at different concentrations and at different hydrogen ion concentrations are identified. From the obtained data, optimal conditions for separating the. two elements are recommended. The possibility of individual concentration of Th(IV) and U(VI) as coloured Arsenazo-I complexes on AG-2X8 is evaluated.