SYNTHESIS OF TETRAVALENT METAL ANTIMONATES - CHARACTERISTICS AND USE IN TREATMENT OF RADIOACTIVE-WASTE SOLUTIONS

Tin(IV) antimonate (SnSb), cerium(IV) antimonate (CeSb), silicon(IV) a ntimonate(SiSb) ant titanium(IV) antimonate (TiSb) were prepared under various conditions. The ion-exchange properties and the thermal stabi lity of these materials were examined in order to elucidate their appl icability to the processing of radioactive liquid wastes. Capacity, eq uilibrium measurements, adsorption isotherms and the selectivity patte rns for Cs+, Sr2+, Co2+ and Eu3+ ions on these sorbents at different c onditions were determined. The effect of high concentrations of salts and complexing agent as interfering ions in the feed solutions on the distribution coefficient of the metals, mentioned above, was tested as a function of [HNO3]. Based on the results obtained, practical separa tion experiments on column were performed.