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Extraction-chromatographic behavior of Zr(IV) and Hf(IV) on TRU and LN resins in mixtures of HNO3 and HF

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Abstract

The behavior of group-4 homologs Zr and Hf on extraction-chromatographic sorbents LN resin and TRU resin in mixtures of HF and HNO3 is considered. Distribution coefficients of the elements in the mixtures of 5·10−4 M–1 M HF and 0.01 M–5 M HNO3 are determined. Strong retention of both elements was found on LN resin in the range of concentrations c(HF) ≤ 0.01 M for all concentrations of HNO3. Retention tends to gradually disappear while increasing c(HF) to 0.5 M. On TRU resin retention is observed only in solutions with c(HNO3) ≥ 2 M and c(HF) ≤ 0.01 M. The possibility of separating Zr(IV) and Hf(IV) on LN resin is illustrated in two different acid mixtures, whereas their separation on TRU resin under the conditions studied in this work is difficult. The results obtained can be used to isolate analytes from multicomponent mixtures during analytical tasks, as well as to separate them from each other.

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Acknowledgements

This work was partially (meaning all researches connected with zirconium) supported by Russian Foundation for Basic Research (RFBR) according to research project № 18-33-00649. We also want to thank Nikolai V. Shikov from Profbusinessgroup and Maxim I. Lenkov from NRC “Kurchatov Institute” for their great contribution to the organization of experiments.

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Authors and Affiliations

  1. Chemistry Department, Lomonosov Moscow State University, Leninskie Gory, 1, Moscow, Russia, 119991

    Taisya Yu. Ekatova & Andrey G. Kazakov

  2. Department of Nuclear and Radiation Medicine, National Research Center “Kurchatov Institute”, Akademika Kurchatova pl., 1, Moscow, Russia, 123182

    Andrey G. Kazakov

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  1. Taisya Yu. Ekatova
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  2. Andrey G. Kazakov
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Correspondence to Taisya Yu. Ekatova.

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Ekatova, T.Y., Kazakov, A.G. Extraction-chromatographic behavior of Zr(IV) and Hf(IV) on TRU and LN resins in mixtures of HNO3 and HF. J Radioanal Nucl Chem 321, 557–563 (2019). https://doi.org/10.1007/s10967-019-06601-x

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