TY - JOUR
T1 - Radiation stability of diglycolamide functionalized calix[4]arenes in ionic liquid
T2 - Solvent extraction, EPR and GC-MS studies
AU - Sengupta, A.
AU - Mohapatra, P.K.
AU - Patil, A.B.
AU - Kadam, R.M.
AU - Verboom, W.
N1 - Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/4/13
Y1 - 2016/4/13
N2 - 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 241Am as a radiotracer. Apart from a decrease in the DAm 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.
AB - 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 241Am as a radiotracer. Apart from a decrease in the DAm 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.
KW - Calixarenes
KW - EPR
KW - GC-MS
KW - Radiolysis
KW - TODGA
KW - n/a OA procedure
UR - http://www.scopus.com/inward/record.url?scp=84958173792&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2016.02.017
DO - 10.1016/j.seppur.2016.02.017
M3 - Article
VL - 162
SP - 77
EP - 83
JO - Separation and purification technology
JF - Separation and purification technology
SN - 1383-5866
ER -