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Calculation of the activity of uranyl nitrate and nitric acid in the H2O–HNO3–UO2(NO3)2–TBP–diluent system using Zdanovskii’s rule

  • Proceedings of the VIII Russian Conference on Radiochemistry “Radiochemistry-2015” (Zheleznogorsk, Krasnoyarsk Krai, Russia, September 28–October 2, 2015)
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Abstract

The description of the H2O–HNO3–UO2(NO3)2–TBP–diluent system required calculation of the activity coefficients of uranyl nitrate and nitric acid in mixed solutions. Three methods for determining the activity coefficients were considered: from the experimental data, using Pitzer’s equation, and using Zdanovskii’s rule with Mikulin’s equations. All the three methods lead to similar results. The relative root-mean-square deviation is 7–10%, but it depends on correct evaluation of the error. The third method will allow calculation of the activity coefficients in multicomponent solutions.

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Authors and Affiliations

  1. Mendeleev Russian University of Chemical Technology, Miusskaya pl. 9, Moscow, 125047, Russia

    A. V. Ochkin, A. O. Merkushkin, S. Yu. Nekhaevskii & E. A. Tyupina

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  1. A. V. Ochkin
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  2. A. O. Merkushkin
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  3. S. Yu. Nekhaevskii
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  4. E. A. Tyupina
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Correspondence to A. V. Ochkin.

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Original Russian Text © A.V. Ochkin, A.O. Merkushkin, S.Yu. Nekhaevskii, E.A. Tyupina, 2016, published in Radiokhimiya, 2016, Vol. 58, No. 3, pp. 242–247.

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Ochkin, A.V., Merkushkin, A.O., Nekhaevskii, S.Y. et al. Calculation of the activity of uranyl nitrate and nitric acid in the H2O–HNO3–UO2(NO3)2–TBP–diluent system using Zdanovskii’s rule. Radiochemistry 58, 280–286 (2016). https://doi.org/10.1134/S1066362216030097

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  • DOI: https://doi.org/10.1134/S1066362216030097

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