Selective sorption of a Ge(IV) oxoanion by composite sorbent with hydrous oxide of cerium

Abstract

ABSTRACTIn this work, composite sorbent based on hydrous cerium oxide was used for selective removal of a Ge (IV) oxoanion. Experiments were carried out by batch equilibrium tests and dynamic column sorption. The best sorption capacity of the Ge(IV) anion was reached at a pH of 9, where the sorption capacity was about 1.1 g/L. The negative effect of chlorides and sulfates was not observed in the concentration range of 100–1000 mg/L. The optimal flow rate for Ge(VI) sorption by sorbent CeO2/XAD-7 was determined to be 6–12 BV/h. For regeneration, 10 BV of 1 mol/L HCl solution was used.