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Synergistic extraction of calcium and strontium into nitrobenzene by using hydrogen dicarbollylcobaltate and dodecaethylene glycol

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Abstract

Solvent extraction of microamounts of calcium and strontium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of dodecaethylene glycol (DDEG, L) has been investigated. The equilibrium data have been explained assuming that the species HL+, H2L2+, ML2+ and MHL3+ (M2+ = Ca2+, Sr2+; L = DDEG) are extracted into the organic phase. The values of extraction and stability constants of the complex species in nitrobenzene saturated with water have been determined. It was found that in this nitrobenzene medium, the stability constant of the SrL2+ complex is somewhat higher than that of CaL2+.

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Acknowledgements

This work was supported by the Grant Agency of Faculty of Environmental Sciences, Czech University of Life Sciences, Prague, Project No.: 42900/1312/3114 “Environmental Aspects of Sustainable Development of Society,” and by the Czech Ministry of Education, Youth and Sports, Project MSM 6046137307.

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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

    E. Makrlík

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

    P. Vaňura

  3. Nuclear Research Institute, 250 68, Řež, Czech Republic

    P. Selucký

Authors
  1. E. Makrlík
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  2. P. Vaňura
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  3. P. Selucký
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Correspondence to P. Vaňura.

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Makrlík, E., Vaňura, P. & Selucký, P. Synergistic extraction of calcium and strontium into nitrobenzene by using hydrogen dicarbollylcobaltate and dodecaethylene glycol. J Radioanal Nucl Chem 295, 2215–2220 (2013). https://doi.org/10.1007/s10967-012-2273-1

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  • DOI: https://doi.org/10.1007/s10967-012-2273-1

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