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Title: Synthesis and radiometric evaluation of diglycolamide functionalized mesoporous silica for the chromatographic separation of actinides Th, Pa and U

Journal Article · · Dalton Transactions
DOI:https://doi.org/10.1039/C8DT00404H· OSTI ID:1523235

The separation of Th, Pa, and U is of critical importance in many applications including nuclear power, nuclear waste, environmental and geochemistry, nuclear forensics and nuclear medicine. Diglycolamide (DGA)-based resins have shown the ability to separate many elements, yet, these resins consist of non-covalent impregnation of the DGA molecules on the resin backbone resulting in co-elution of the extraction molecule during separation cycles, therefore limiting their long-term and repeated use. Covalently binding the DGA molecules onto silica is one way to overcome this issue. Herein, measured equilibrium distribution coefficients of normal extraction chromatographic DGA resin and a covalently bound form (KIT-6-N-DGA sorbent) are reported. Several differences are observed between the two systems, the most significant being observed for uranium, which demonstrated significantly lower sorption behavior on KIT-6-N-DGA. These results indicate that U can effectively be separated from Th and Pa using KIT-6-N-DGA, a task that could not be completed with the use of normal DGA alone.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC). Nuclear Physics (NP); USDOE
Grant/Contract Number:
89233218CNA000001; AC52-06NA253996; AC05-00OR22725; FOA LAB 14-1099
OSTI ID:
1523235
Alternate ID(s):
OSTI ID: 1434126; OSTI ID: 1843725
Report Number(s):
LA-UR-17-29815; ICHBD9
Journal Information:
Dalton Transactions, Vol. 47, Issue 15; ISSN 1477-9226
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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Cited By (2)

Investigation of U(VI), Th(IV), and Eu(III) ions’ sorption behavior onto silica gel modified with anhydride journal July 2019
Synthetic saponite clays as promising solids for lanthanide ion recovery journal January 2020