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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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Author notes

  1. Peter R. Tremaine

    Present address: Oil Sands Research Department, Alberta Research Council, 11315-87th Avenue, T6G 2C2, Edmonton, Alberta, Canada

Authors and Affiliations

  1. Chemistry and Materials Science Division, Whiteshell Nuclear Research Establishment, Atomic Energy of Canada Limited, R0E 1L0, Pinawa, Manitoba, Canada

    Peter R. Tremaine, J. D. Chen, G. J. Wallace & W. A. Boivin

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  1. Peter R. Tremaine
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  2. J. D. Chen
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  3. G. J. Wallace
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  4. W. A. Boivin
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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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