Extraction of caesium(I) from HNO3 medium using room temperature ionic liquid containing calix[4] crown ligands as the selective extractants

被引：16
作者：
Ansari, S. A. [1 ]
Mohapatra, P. K. [1 ]
Raut, D. R. [1 ]
Manchanda, V. K. [1 ]
机构：
[1] Bhabha Atom Res Ctr, Div Radiochem, Bombay 400085, Maharashtra, India
来源：
RADIOCHIMICA ACTA | 2011年 / 99卷 / 11期
关键词：
Room temperature ionic liquid; Radio-caesium; Solvent extraction; Radioactive waste management; SOLVENT-EXTRACTION; METAL-IONS; CESIUM; MECHANISM; REMOVAL; NITRATE; SR2+; CS+;
D O I：
10.1524/ract.2011.1866
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Studies on the extraction of Cs(I) from nitric acid medium were carried out using three commercial calix-crown ligands, viz. calix[4] arene-bis-crown-6, calix[4] arene-bis-1,2-benzocrown-6 and calix[4] arene-bis-2,3-naphthocrown-6 dissolved in different room temperature ionic liquids (RTILs), viz. 1-butyl-3-methyl-imidazolium hexafluorophosphate (C(4)mim center dot PF6), 1-hexyl-3-methyl-imidazolium hexafluorophosphate (C(6)mim center dot PF6) and 1-octyl-3-methyl-imidazolium hexafluorophosphate (C(8)mim center dot PF6). The distribution ratio of Cs(I) decreased with increased alkyl chain length of RTILs. The effect of nitric acid concentration on distribution behaviour of Cs(I) by calix[4] arene-bis-1,2-benzocrown-6 was investigated. The extraction of Cs(I) from HNO3 was found to be exothermic and extraction was found to be enthalpy driven. Selective extraction of Cs(I) could be achieved from a mixture of various fission product elements like Tc, Mo, Zr, Ce, Ru, La, Ba, and Sr.
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页码：713 / 717
页数：5
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