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Reaction of ozone with Np(IV) and Pu(IV) oxalates in water

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Radiochemistry Aims and scope

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Abstract

The reaction of the ozone–oxygen mixture with aqueous suspensions of Np(IV) and Pu(IV) oxalates was studied. Both metal cations and oxalate anions are oxidized in the process. The final products are Np(VI) and Pu(VI) hydroxides. The composition of Np(VI) hydroxide was confirmed by X-ray diffraction analysis. Oxidation of Np(IV) oxalate with oxygen leads to the accumulation of Np(V) oxalate and oxalic acid in the solution. At incomplete oxidation of Np(IV) oxalate with ozone in water, Np(V) is also accumulated. Heating considerably accelerates the ozonation. The possible reaction mechanism is briefly discussed. The Np(V) and Np(VI) ions participate in the catalytic cycle of the decomposition of oxalate ions with ozone.

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Authors and Affiliations

  1. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, korp. 4, Moscow, 119071, Russia

    A. M. Fedoseev, A. V. Gogolev, V. P. Shilov, I. A. Charushnikova, V. I. Makarenkov & V. P. Perminov

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  1. A. M. Fedoseev
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  2. A. V. Gogolev
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  3. V. P. Shilov
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  4. I. A. Charushnikova
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  5. V. I. Makarenkov
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  6. V. P. Perminov
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Corresponding author

Correspondence to A. V. Gogolev.

Additional information

Original Russian Text © A.M. Fedoseev, A.V. Gogolev, V.P. Shilov, I.A. Charushnikova, V.I. Makarenkov, V.P. Perminov, 2017, published in Radiokhimiya, 2017, Vol. 59, No. 6, pp. 502–509.

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Fedoseev, A.M., Gogolev, A.V., Shilov, V.P. et al. Reaction of ozone with Np(IV) and Pu(IV) oxalates in water. Radiochemistry 59, 570–578 (2017). https://doi.org/10.1134/S1066362217060042

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  • DOI: https://doi.org/10.1134/S1066362217060042

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