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Electrolytic reduction of U(VI) to U(IV) in acidic chloride and acidic sulfate solutions

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Abstract

In order to examine the applicability of the electrolytic reduction process of U(VI) (originally developed for the chloride system by PNC) to the sulfate solution system, a fundamental study was made. In this study, the concentrations of various chemical species in the catholytes were calculated at 298 K at various percentages of uranium reduction, taking the chloro-complex and sulfato-complex formation reactions of uranium into consideration. The polarization characteristics of the electrolytic reduction of uranyl chloride and uranyl sulfate were determined, using titanium and platinum cathodes, respectively, at 303 ± 1 K. In conjunction with this process, the electrical conductivity of the catholyte, the electrical resistivity of the cation exchange membrane, and the diffusion coefficient of uranyl sulfate were also determined.

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Authors and Affiliations

  1. Department of Metallurgy, Kyoto University, 606, Kyoto, Japan

    Hiroshi Majima (Professor) & Yasuhiro Awakura (Lecturer)

  2. Mining and Ore Processing Division, Ningyo-toge Works, Power Reactor and Nuclear Fuel Development Corporation, 1550 Kamisaibara, Tomata-gun, 708-06, Okayama prefecture, Japan

    Shuichiro Hirono (Manager)

Authors
  1. Hiroshi Majima
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  2. Yasuhiro Awakura
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  3. Shuichiro Hirono
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Majima, H., Awakura, Y. & Hirono, S. Electrolytic reduction of U(VI) to U(IV) in acidic chloride and acidic sulfate solutions. Metall Trans B 17, 41–50 (1986). https://doi.org/10.1007/BF02670817

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  • DOI: https://doi.org/10.1007/BF02670817

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