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Solubility of uranium (IV) oxide in alkaline aqueous solutions to 300°C

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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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Tremaine, P.R., Chen, J.D., Wallace, G.J. et al. Solubility of uranium (IV) oxide in alkaline aqueous solutions to 300°C. J Solution Chem 10, 221–230 (1981). https://doi.org/10.1007/BF00653099

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  • DOI: https://doi.org/10.1007/BF00653099

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