TY - JOUR
T1 - Sequestration of Np(IV) and Pu(IV) with Hexa-n-octyl nitrilotriacetamide (HONTA) in an Ionic Liquid
T2 - Unusual Species vis-à-vis a Molecular Diluent
AU - Gujar, Rajesh B.
AU - Mahanty, Bholanath
AU - Ansari, Seraj A.
AU - Egberink, Richard J.M.
AU - Huskens, Jurriaan
AU - Verboom, Willem
AU - Mohapatra, Prasanta K.
N1 - Publisher Copyright:
© 2023 American Chemical Society.
PY - 2024/1/10
Y1 - 2024/1/10
N2 - The extraction of Np(IV) and Pu(IV) was studied using a tripodal amide ligand (N,N,N′,N′,N″,N″-hexa-n-octyl nitrilotriacetamide termed as HONTA) in an ionic liquid (C4mim·NTf2) as well as in a molecular diluent mixture (95% n-dodecane +5% iso-decanol) from an aqueous feed containing diluted nitric acid. The extraction efficiency of Pu(IV) was higher than that of Np(IV), while the RTIL-based solvent system extracted the metal ions better than the molecular diluent-based solvent system. The extracted species were ascertained by slope analysis as M(NO3)5·L(LH) and M(NO3)4·L2 for the ionic liquid- and the molecular diluent-based solvent systems, respectively. The stripping of the metal ions from the organic extracts was achieved efficiently when a buffered complexing medium of 0.05 M EDTA and 1 M guanidine carbonate was used. Cyclic voltammetry was done for the Np(IV) extract in the ionic liquid-based solvent system in view of the wide electrochemical window experienced.
AB - The extraction of Np(IV) and Pu(IV) was studied using a tripodal amide ligand (N,N,N′,N′,N″,N″-hexa-n-octyl nitrilotriacetamide termed as HONTA) in an ionic liquid (C4mim·NTf2) as well as in a molecular diluent mixture (95% n-dodecane +5% iso-decanol) from an aqueous feed containing diluted nitric acid. The extraction efficiency of Pu(IV) was higher than that of Np(IV), while the RTIL-based solvent system extracted the metal ions better than the molecular diluent-based solvent system. The extracted species were ascertained by slope analysis as M(NO3)5·L(LH) and M(NO3)4·L2 for the ionic liquid- and the molecular diluent-based solvent systems, respectively. The stripping of the metal ions from the organic extracts was achieved efficiently when a buffered complexing medium of 0.05 M EDTA and 1 M guanidine carbonate was used. Cyclic voltammetry was done for the Np(IV) extract in the ionic liquid-based solvent system in view of the wide electrochemical window experienced.
KW - 2024 OA procedure
U2 - 10.1021/acs.iecr.3c03132
DO - 10.1021/acs.iecr.3c03132
M3 - Article
AN - SCOPUS:85180946541
SN - 0888-5885
VL - 63
SP - 480
EP - 488
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 1
ER -