Separation of Uranium from Sodium Carbonate-Sodium Bicarbonate Eluate by Ion Exchange Method

Studies on the Extraction of Uranium from Sea Water by the Composite Adsorbent (Part 13)

Abstract

The ion exchange method was used for separating uranium from the eluate (0.5 N Na₂CO₃-0.5 NNaHCO₃) that was obtained in the extraction process of uranium from natural sea water by using the titanium-activated carbon composite adsorbent.
Uranium in the eluate containing 3mg/l uranium was adsorbed by ion exchange resin (Amberlite IRA-400), and was eluted with the eluant (5% NaCl-0.5% Na₂CO₃). The concentration ratio of uranium in the final concentrated-eluate became more than 20 times. The eluting solution to the adsorbent and the eluant to the resin could be repeatedly used in the desorption-ion exchange process. Sodium carbonate was consumed at the desorption step, and sodium bicarbonate was consumed at the ion exchange step. The concentration ratio of uranium was found to decrease as chloride ion in the eluate increased.