Adsorption of some hazardous radionuclides on cerium (IV) antimonate |
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| Authors: | H F Aly E S Zakaria S A Shady I M El-Naggar |
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| Institution: | (1) Atomic Energy Authority, Hot Labs. Centre, P. O. 13759, Cairo, Egypt |
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| Abstract: | Cerium(IV) antimonate was prepared by dropwise addition of 0.6M antimony pentachloride and 0.6M cerium ammonium nitrate solutions
by a molar ratio of Ce/Sb 0.75. Exchange isotherms for H+/Co2+, H+/Cs+, H+/Zn2+, H+/Sr2+ and H+/Eu3+ were determined at 25, 40 and 60°C. Besides, it was proved that europium is physically adsorped, while zinc, strontium, cobalt
and cesium are chemically adsorbed. Moreover, the heat of adsorption of zinc, strontium, cobalt and cesium on cerium (IV)
antimonate was calculated and indicated that cerium(IV) antimonate is of endothermic behavior towards these ions. Also the
distribution coefficients of these ions were determined and it was found that the selectivity is in the order: Eu3+>Sr2+>Cs+>Na+. |
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