Infrared spectroscopic studies of uranyl(VI) species adsorbed from aqueous [UO2(CO3)3]4– solutions on to a polymer bearing amidoxime groups

Abstract

Infrared spectra of uranyl(VI) species adsorbed from aqueous [UO₂(CO₃)₃]^4– solutions on to a polymer having amidoxime groups were examined in order to obtain information on the adsorption mechanism. The subtraction spectra in a region of 500–1 500 cm^–1 exhibit only a distinct band at 886 cm^–1 ascribed to the ν₃ mode of the OUO moiety and no band assigned to carbonato ligands, suggesting the existence of a carbonato-free uranyl(VI) complex; this is consistent with the adsorption equilibrium reported previously.