Solubility of uranium (IV) oxide in alkaline aqueous solutions to 300°C |
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| Authors: | Peter R Tremaine J D Chen G J Wallace W A Boivin |
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| Institution: | 1. Chemistry and Materials Science Division, Whiteshell Nuclear Research Establishment, Atomic Energy of Canada Limited, R0E 1L0, Pinawa, Manitoba, Canada
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| Abstract: | The solubility of carefully characterized UO2 in pOH 1.5 and pOH 2.5 aqueous solutions has been determined from 25°C to 300°C using a flow apparatus. Data were analyzed in terms of the reaction $$UO_2 + 2H_2 O + OH^ - \rightleftharpoons U(OH); log K = - 5.86 + 32/T$$ The extreme sensitivity of both the UO2 surface and aqueous U(IV) to oxidation is discussed. |
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