TY - JOUR
T1 - Highly selective carrier mediated transport of plutonium(IV) across a supported liquid membrane using two substituted tripodal amides
AU - Karak, Ananda
AU - Mahanty, Bholanath
AU - Mohapatra, Prasanta K.
AU - Egberink, Richard J.M.
AU - Valsala, Thichur P.
AU - Sathe, Darshan B.
AU - Bhatt, Raj B.
AU - Huskens, Jurriaan
AU - Verboom, Willem
N1 - Funding Information:
AK, TPV, DBS, RBB wish to thank Mr. K.V. Ravi, Chief Executive, Nuclear Recycles Board for his constant encouragement, while BNM and PKM acknowledge Dr. P.K. Pujari, Director, Radiochemistry and Isotope Group, BARC, for his keen interest.
Publisher Copyright:
© 2022 The Author(s). Published with license by Taylor & Francis Group, LLC.
PY - 2023
Y1 - 2023
N2 - Plutonium-specific supported liquid membranes were developed and reported for the first time. The studies included in this paper are on the supported liquid membrane transport behavior of Pu(IV), Am(III) and U(VI) investigated using two tripodal amides viz. N,N,N,’N,’N,”N”-hexa-n-octylnitrilotriacetamide (HONTA) and N,N,N,’N,’N,”N”-hexa-n-dodecylnitrilotriacetamide (HDDNTA). The feed phase consisted of 3 M HNO3 while 0.5 M oxalic acid +0.5 M HNO3 was used as the strip phase. The SLM studies indicated 78.2% and 86.2% transport of plutonium(IV) after 4 h using 0.08 M concentrations of HONTA and HDDNTA, respectively, and the transport of Am(III) and U(VI) was <1% under identical feed acid conditions indicating a possible highly selective separation of Pu(IV) using HONTA as the carrier ligand from a mixture of Pu(IV), Am(III) and U(VI). The stability of the membrane was reasonably good up to 9 days. The activation energy of the transport process was determined using temperature variation studies with HONTA and HDDNTA indicating the transport process being kinetically as well as diffusion controlled. This work is highly relevant for the separation of Pu from radioactive feeds containing other actinide elements such as U and Am.
AB - Plutonium-specific supported liquid membranes were developed and reported for the first time. The studies included in this paper are on the supported liquid membrane transport behavior of Pu(IV), Am(III) and U(VI) investigated using two tripodal amides viz. N,N,N,’N,’N,”N”-hexa-n-octylnitrilotriacetamide (HONTA) and N,N,N,’N,’N,”N”-hexa-n-dodecylnitrilotriacetamide (HDDNTA). The feed phase consisted of 3 M HNO3 while 0.5 M oxalic acid +0.5 M HNO3 was used as the strip phase. The SLM studies indicated 78.2% and 86.2% transport of plutonium(IV) after 4 h using 0.08 M concentrations of HONTA and HDDNTA, respectively, and the transport of Am(III) and U(VI) was <1% under identical feed acid conditions indicating a possible highly selective separation of Pu(IV) using HONTA as the carrier ligand from a mixture of Pu(IV), Am(III) and U(VI). The stability of the membrane was reasonably good up to 9 days. The activation energy of the transport process was determined using temperature variation studies with HONTA and HDDNTA indicating the transport process being kinetically as well as diffusion controlled. This work is highly relevant for the separation of Pu from radioactive feeds containing other actinide elements such as U and Am.
KW - Liquid membrane
KW - NTA amide
KW - Plutonium
KW - Radioactive waste
KW - Transport
KW - UT-Hybrid-D
UR - http://www.scopus.com/inward/record.url?scp=85141102973&partnerID=8YFLogxK
U2 - 10.1080/01496395.2022.2119411
DO - 10.1080/01496395.2022.2119411
M3 - Article
AN - SCOPUS:85141102973
VL - 58
SP - 382
EP - 393
JO - Separation Science and Technology (Philadelphia)
JF - Separation Science and Technology (Philadelphia)
SN - 0149-6395
IS - 2
ER -