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Uranium sorption from nitric acid solutions with cation exchangers and polyampholytes

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Abstract

Sorption of uranium ions with KU-2 × 8 sulfonic cation exchanger, KFP-12 phosphoric acid cation exchanger, and aminophosphoric acid ampholytes was examined in nitric acid solutions containing different amounts of HNO3. Formation of polymeric complexes was confirmed by IR spectra. The ion-coordination mechanism of U sorption with KFP-12 cation exchanger was clearly manifested; also possible is sorption of U as a single-charged nitrate complex ion. The isotherms of sorption of the U ions with KFP-12 cation exchanger have a convex shape with a sharply ascending portion at low U concentrations, which is favorable for U recovery from raffinate solutions. Nitrogen-phosphorus-containing polyampholytes also possess a high sorption power with respect to the U ions in nitric acid solutions. The highest exchange capacity is exhibited by ANKF-80 and ANKF-86 polyampholytes on polyacrylate base.

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Authors and Affiliations

  1. Rare Metals Chair, Ural State Technical University, Yekaterinburg, Russia

    V. N. Rychkov & L. V. Norkina

Authors
  1. V. N. Rychkov
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  2. L. V. Norkina
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Original Russian Text © V.N. Rychkov, L.V. Norkina, 2007, published in Radiokhimiya, 2007, Vol. 49, No. 5, pp. 442–444.

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Rychkov, V.N., Norkina, L.V. Uranium sorption from nitric acid solutions with cation exchangers and polyampholytes. Radiochemistry 49, 504–506 (2007). https://doi.org/10.1134/S1066362207050104

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  • DOI: https://doi.org/10.1134/S1066362207050104

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