Radiation stability of diglycolamide functionalized calix[4]arenes in ionic liquid: Solvent extraction, EPR and GC-MS studies

被引：18
|
作者：
Sengupta, A. [1 ]
Mohapatra, P. K. [1 ]
Patil, A. B. [2 ]
Kadam, R. M. [1 ]
Verboom, W. [3 ]
机构：
[1] Bhabha Atom Res Ctr, Div Radiochem, Bombay 400085, Maharashtra, India
[2] Paul Scherrer Inst, Chem Proc & Mat Res Grp, CH-5232 Villigen, Switzerland
[3] Univ Twente, MESA Inst Nanotechnol, Lab Mol Nanofabricat, POB 217, NL-7500 AE Enschede, Netherlands
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 2016年 / 162卷
关键词：
TODGA; Calixarenes; Radiolysis; EPR; GC-MS; COUNTER-CURRENT EXTRACTION; INDUCED REDOX REACTIONS; ACTINIDE EXTRACTION; CONSTITUENT IONS; TODGA; RADIOLYSIS; CHEMISTRY; FRAGMENTATION; LANTHANIDES; TEHDGA;
D O I：
10.1016/j.seppur.2016.02.017
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Ionic liquid-based solvent systems containing diglycolamide-functionalized calix[4]arenes (C4DGAs) are efficient for actinide ion extraction from nitric acid feeds. Therefore, the radiolytic stability of three C4DGAs (wide-rim, narrow-rim and both side DGA-functionalized calix[4]arenes) and TODGA (N,N,N',N'-tetraoctyldiglycolamide) (used for comparison purpose), was evaluated by exposing their solutions in an ionic liquid as well as a 95:5 mixture of n-dodecane + isodecanol to gamma radiation up to an absorbed dose of 1000 kGy. Liquid-liquid extraction studies were carried out using Am-241 as a radiotracer. Apart from a decrease in the D-Am values, ascribed to radiolytic degradation, FT-IR, EPR and GC-MS studies were carried out to characterize the degraded species. The different extractants are less sensitive to radiolytic degradation in the ionic liquid than in the molecular diluent. (c) 2016 Elsevier B.V. All rights reserved.
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页码：77 / 83
页数：7
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