Extractive Properties of Synergistic Mixture of Hydrogen Dicarbollylcobaltate and N, N, N´, N´- Tetraisobutyl - 2, 6 - Dipicolinamide in the Water - Nitrobenzene System with Regard to Eu3+ and Am3+
Emanuel Makrlík,1,* Petr Vaňura,2 Pavel Selucký,3 Vasily A. Babain4 and Igor V. Smirnov4
1 Faculty of Applied Sciences, University of West Bohemia,
Husova 11, 306 14 Pilsen, Czech Republic
2 Institute of Chemical Technology, Technická 5, 166 28 Prague 6,
Czech Republic
3 Nuclear Research Institute, 250 68 Řež,
Czech Republic
4 Khlopin Radium Institute, Research and Production Association, St.
Petersburg, Russia
* Corresponding author: E-mail: makrlik@centrum.cz
Abstract
Extraction of microamounts of europium and americium by a nitrobenzene solution
of hydrogen dicarbollylcobaltate (H+B–) in the presence of
N, N, N´, N´ - tetraisobutyl - 2, 6 - dipicolinamide
[T(iBu)DPA, L] has been investigated. The equilibrium data have been explained
assuming that the cations HL+, HL2+ , ML23+
and ML33+ (M3+ = Eu3+, Am3+)
are extracted into the organic phase. The values of extraction and stability
constants of the species in nitrobenzene saturated with water have been
determined.
Keywords: Europium, americium, hydrogen dicarbollylcobaltate, N, N, N´, N´ - tetraisobutyl - 2, 6 - dipicolinamide, water-nitrobenzene system, extraction and stability constants