期刊
SEPARATION SCIENCE AND TECHNOLOGY
卷 47, 期 1, 页码 81-88出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2011.614317
关键词
distribution ratio (D); radioactive waste; separation of Cs-137; sodium tetraphenylboron (TPB); solvent extraction
资金
- Radiochemistry and Isotope Group
The paper describes a method for the recovery of Cs-137 from an aqueous radioactive laboratory waste solution containing Cs-137 (2 mu g/mL) in the presence of high concentration of Na+ using solvent extraction technique. The method comprises of adjustment of pH to the acidic range (pH = 2), contacting the aqueous radioactive solution with sodium tetraphenylboron (TPB) in nitrobenzene, whereby Cs-137 binds with tetraphenylboron anions and gets separated. Results of this investigation indicate that Cs-137 could be efficiently and selectively extracted from an aqueous solution media containing high concentration of Na+ under mildly acidic pH into an organic phase and back extracted with small volume of 3M HNO3, thus enabling concentration. The proposed method was successfully applied in real samples.
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