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Sodium Ionophore III as Very Effective Receptor for Trivalent Europium and Americium

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Abstract

Solvent extraction of micro amounts of europium and americium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of Sodium ionophore III (L) was investigated. The equilibrium data were explained assuming that the species HL+, \( \text{HL}_{2}^{ + } \), ML3+, \( \text{ML}_{\text{2}}^{{\text{3} + }} \), and \( \text{ML}_{\text{3}}^{{\text{3} + }} \) (M3+ = Eu3+, Am3+; L = Sodium ionophore III) are extracted into the organic phase. The values of extraction and stability constants of the cationic complex species were determined in nitrobenzene saturated with water. It was found that the values of the stability constants of the corresponding complexes \( {\text{EuL}}_{n}^{ 3+ } \) and \( {\text{AmL}}_{n}^{ 3+ } \), where n = 1, 2, 3 and L is Sodium ionophore III, in water-saturated nitrobenzene are comparable. Finally, it was proven experimentally that in the considered nitrobenzene medium, the investigated Sodium ionophore III ligand is a very effective receptor for the Eu3+ and Am3+ cations. It means that this receptor can be considered as a potential extraction agent for nuclear waste treatment.

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Acknowledgments

This work was supported by the Grant Agency of Faculty of Environmental Sciences, Czech University of Life Sciences, Prague, Project No.: 42900/1312/3114 entitled “Environmental Aspects of Sustainable Development of Society,” and by the Czech Ministry of Education, Youth, and Sports, Project MSMT No.: 20/2015.

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Authors and Affiliations

  1. Faculty of Environmental Sciences, Czech University of Life Sciences, Prague, Kamýcká 129, 165 21, Prague 6, Czech Republic

    Emanuel Makrlík & Magdalena Kvíčalová

  2. Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague 6, Czech Republic

    Petr Vaňura

Authors
  1. Emanuel Makrlík
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  2. Magdalena Kvíčalová
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  3. Petr Vaňura
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Correspondence to Petr Vaňura.

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Makrlík, E., Kvíčalová, M. & Vaňura, P. Sodium Ionophore III as Very Effective Receptor for Trivalent Europium and Americium. J Solution Chem 45, 463–474 (2016). https://doi.org/10.1007/s10953-016-0447-0

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