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Modeling of systems with aqueous solutions of UO 2+2 salts. Asymmetric model of excess thermodynamic functions, based on virial expansion of the Gibbs free energy of the solution, VD-AS

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Abstract

An asymmetric model of virial expansion of the Gibbs free energy of solution, VD-AS, was suggested. Partial and molar thermodynamic functions of UO2(ClO4)2–H2O, UO2Cl2–H2O, and UO2(NO3)2–H2O binary solutions at 25°C were calculated using this model. The calculations show that the solutions are characterized by different, sometimes extremely large, deviations from ideality. The suggested model is considerably more accurate and stable than the most widely used Pitzer’s model of electrolyte solutions.

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Authors and Affiliations

  1. St. Petersburg State Institute of Technology (Technical University), Moskovskii pr. 26, St. Petersburg, 190013, Russia

    N. A. Charykov, A. V. Kurilenko, V. A. Keskinov, A. A. Zolotarev & V. V. Klepikov

  2. Leningrad Electrotechnical Institute—St. Petersburg State Electrotechnical University, ul. Prof. Popova 5, St. Petersburg, 197022, Russia

    N. A. Charykov

  3. St. Petersburg State University, Universitetskaya nab. 7–9, St. Petersburg, 199034, Russia

    K. N. Semenov

  4. St. Petersburg State Architectural and Building University, 2-ya Krasnoarmeiskaya ul. 4, St. Petersburg, 190005, Russia

    D. G. Letenko

  5. Serikbaev East Kazakhstan State Technical University, ul. Protozanova 1, Ust-Kamenogorsk, 070000, Kazakhstan

    N. A. Kulenova

Authors
  1. N. A. Charykov
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  2. K. N. Semenov
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  3. A. V. Kurilenko
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  4. V. A. Keskinov
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  5. D. G. Letenko
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  6. N. A. Kulenova
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  7. A. A. Zolotarev
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  8. V. V. Klepikov
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Corresponding author

Correspondence to V. A. Keskinov.

Additional information

Original Russian Text © N.A. Charykov, K.N. Semenov, A.V. Kurilenko, V.A. Keskinov, D.G. Letenko, N.A. Kulenova, A.A. Zolotarev, V.V. Klepikov, 2017, published in Radiokhimiya, 2017, Vol. 59, No. 2, pp. 119–126.

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Charykov, N.A., Semenov, K.N., Kurilenko, A.V. et al. Modeling of systems with aqueous solutions of UO 2+2 salts. Asymmetric model of excess thermodynamic functions, based on virial expansion of the Gibbs free energy of the solution, VD-AS. Radiochemistry 59, 134–142 (2017). https://doi.org/10.1134/S1066362217020059

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  • DOI: https://doi.org/10.1134/S1066362217020059

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