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Kinetics of reduction of U(VI) with zinc amalgam in sulfuric acid solutions

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Abstract

The kinetics of reduction of U(VI) with zinc amalgam at H2SO4 concentrations of 0.5–4.0 M, initial UO 2+2 concentrations of (2.08–40.00) × 10−3 M, and temperatures of 295.0–325.0 K was studied by spectrophotometry. The kinetic scheme of the UO 2+2 transformation, the rate law, and the reduction rate constants were determined. The activation energy E a and the thermodynamic functions of formation of the activated complex (Gibbs energy ΔG ≠, enthalpy ΔH ≠, and entropy ΔS ≠ of activation) were calculated.

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Authors and Affiliations

  1. Research Institute of Atomic Reactors, Dimitrovgrad-10, Ulyanovsk oblast, 433510, Russia

    V. N. Momotov, E. A. Erin & V. M. Chistyakov

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  1. V. N. Momotov
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  2. E. A. Erin
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  3. V. M. Chistyakov
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Correspondence to V. N. Momotov.

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Original Russian Text © V.N. Momotov, E.A. Erin, V.M. Chistyakov, 2015, published in Radiokhimiya, 2015, Vol. 57, No. 1, pp. 27–31.

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Momotov, V.N., Erin, E.A. & Chistyakov, V.M. Kinetics of reduction of U(VI) with zinc amalgam in sulfuric acid solutions. Radiochemistry 57, 31–35 (2015). https://doi.org/10.1134/S1066362215010051

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  • DOI: https://doi.org/10.1134/S1066362215010051

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