Synthesis and radiometric evaluation of diglycolamide functionalized mesoporous silica for the chromatographic separation of actinides Th, Pa and U
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of Vienna (Austria)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
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
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