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

被引：2
|
作者：
Makrlik, E. [1 ]
Vanura, P. [2 ]
Selucky, P. [3 ]
机构：
[1] Czech Univ Life Sci, Fac Environm Sci, Prague 16521 6, Czech Republic
[2] Inst Chem Technol, Dept Analyt Chem, CR-16628 Prague 6, Czech Republic
[3] Nucl Res Inst, CZ-25068 Rez, Czech Republic
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2013年 / 295卷 / 03期
关键词：
Calcium; Strontium; Dodecaethylene glycol; Complexation; Water-nitrobenzene system; Extraction and stability constants; ACIDIC RADIOACTIVE-WASTE; POLYETHYLENE-GLYCOL; SOLVENT-EXTRACTION; CESIUM EXTRACTION; UNEX PROCESS; BARIUM; MICROAMOUNTS; DICARBOLIDE; PEG; THERMODYNAMICS;
D O I：
10.1007/s10967-012-2273-1
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
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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页码：2215 / 2220
页数：6
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