Synergistic Extraction of Europium and Americium into Nitrobenzene by Using Hydrogen Dicarbollylcobaltate and Dodecaethylene Glycol

Authors

  • Emanuel Makrlík Faculty of Environmental Sciences, Czech University of Life Sciences, Prague, Kamýcká 129, 165 21 Prague 6, Czech Republic
  • Petr Vaňura Department of Analytical Chemistry, Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
  • Pavel Selucký Nuclear Research Institute, 250 68 Řež, Czech Republic

Keywords:

Europium, americium, hydrogen dicarbollylcobaltate, dodecaethylene glycol, complexation, water–nitrobenzene system, extraction and stability constants

Abstract

Extraction of microamounts of europium and americium 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+, ML3+ and MH-1L2+ (M3+ = Eu3+, Am3+; 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 EuL3+ complex is comparable with that of AmL3+.

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Published

06.11.2013

Issue

Vol. 60 No. 3 (2013)

Section

Physical chemistry

License

Except where otherwise noted, articles in this journal are published under the Creative Commons Attribution 4.0 International License