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Depolymerization of Pu(IV) Polymer in 0.5-3 M HNO3 in the Presence of Reductants and Oxidants

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Abstract

Methods of depolymerization of polymeric Pu(IV) in 0.5-3 M HNO3 in the presence of reductants [hydroquinone, H2O2, hydroxylamine, U(IV)] and oxidants [KMnO4, H2O2 + Fe(NO3)3, Na2S2O8 + catalysts, Co(III)] were studied. The ratios of various oxidation states and complex species of plutonium in such systems were determined by electronic absorption spectroscopy. A mechanism of depolymerization of Pu(IV) by sodium persulfate in 0.5-3 M HNO3 in the presence of Co(II) salts was proposed. The stepwise stability constant of the PuO2SO4 complex K 1 was estimated.

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Authors and Affiliations

  1. Institute of Physical Chemistry, Russuian Academy of Sciences, Moscow, Russia

    V. M. Ermolaev, E. V. Zakharova & V. P. Shilov

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  1. V. M. Ermolaev
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  2. E. V. Zakharova
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  3. V. P. Shilov
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Ermolaev, V.M., Zakharova, E.V. & Shilov, V.P. Depolymerization of Pu(IV) Polymer in 0.5-3 M HNO3 in the Presence of Reductants and Oxidants. Radiochemistry 43, 424–428 (2001). https://doi.org/10.1023/A:1012874322870

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