Abstract
The present work deals with uranium removal from a nitric acid raffinate (waste) solution using prepared solvent (tri-butyl phosphate, TBP) immobilizing PVC cement (SIC) as a suitable adsorbent. The studied relevant factors affecting uranium adsorption onto SIC adsorbent involved; contact time, solution molarity, initial uranium concentration and temperature. The obtained adsorption isotherm of uranium onto the SIC adsorbent was fitted to Langmuir, Freundlich and Dubinin–Radushkviech (D–R) adsorption models. The results showed that the obtained equilibrium data fitted well the Langmuir isotherm. Additionally, it was found that the adsorption process obeys the pseudo second-order kinetic model. On the other hand, the calculated theoretical capacity of our prepared SIC adsorbent reached about 17 g U/kg SIC. Uranium adsorption from the studied raffinate solution was carried out applying the attained optimum conditions. The obtained data showed that 58.4 mg U/5 g SIC were adsorbed. However, using of 2 M HNO3 solution as an eluent, 93 (54.3 mg U) from the adsorbed amount were eluted.
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Hussein, A.E.M., Taha, M.H. Uranium removal from nitric acid raffinate solution by solvent immobilized PVC cement. J Radioanal Nucl Chem 295, 709–715 (2013). https://doi.org/10.1007/s10967-012-2158-3
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DOI: https://doi.org/10.1007/s10967-012-2158-3