Examination of actinide chemistry at solid-water interfaces to support advanced actinide separations (Final Report)
In this work we have examined the thermodynamics of actinide interactions with solid interfaces in the presence and absence of multi-functional complexing ligands. The term “interactions” is a global term to capture many potential reactions including aqueous complexation, sorption/surface complexation, surface-mediated redox reactions, electrostatic attraction and repulsion, surface passivation, surface precipitation, and counter-ion competition. Each of these potential reactions may control actinide interactions with a solid surface. This work is helping to develop a more fundamental understanding of actinide bonding at solid:water interfaces and examine unique surface mediated oxidation/reduction reactions which are not expected based on the reduction potentials of aqueous species. We place a large emphasis on understanding both sorption and desorption processes as a means of understanding the sorption mechanisms. This work is directly aligned with the DOE BES Heavy Element Chemistry programs interests in understanding “the chemical and physical properties of these elements to determine solution, interfacial and solid-state bonding and reactivity”.
- Research Organization:
- Clemson Univ., Anderson, SC (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
- DOE Contract Number:
- SC0010355
- OSTI ID:
- 1608924
- Report Number(s):
- DOE-Clemson-0010355; TRN: US2104836
- Resource Relation:
- Related Information: Bliznyuk, V. N., Kołacińska, K., Pud, A. A., Ogurtsov, N. A., Noskov, Y. V., Powell, B. A., DeVol, T. A., “High effectiveness of pure polydopamine in extraction of uranium and plutonium from groundwater and seawater” RSC Advances 9(52), 30052-30063, 2019. DOI: 10.1039/c9ra06392gBliznyuk, V.N., Conroy, N., Xie, Y., Podila, R., Rao, A., Powell, B. A. “Modification of redox reactions of uranyl due to its interaction with graphene oxide surfaces: physical versus chemical factors” Physical Chemistry and Chemical Physics, 20, 1752-1760, 2018. doi: 10.1039/c7cp04197gXie, Y., Powell, B. A., “Linear free energy relationship for actinide sorption to graphene oxide” ACS Applied Materials and Interfaces, 10, 32086-32092, 2018. DOI: 10.1021/acsami.8b08478Conroy, N., Wylie, E. M., Powell, B. A. “A novel method for tracer concentration Pu(V) solution preparation” Analytical Chemistry, 88(8), 4196-4199, 2016. DOI: 10.1021/acs.analchem.6b00229Xie, Y, Helvenston, E., Shuller-Nickles, L., Powell, B. A., “Surface Complexation Modeling and Quantum-mechanical Calculations of Eu(III) and U(VI) Interactions with Graphene Oxide” Environmental Science and Technology, 50(4), 1921-1827, 2016. DOI: 10.1021/acs.est.5b05307Wylie, E. M., Olive, D., Powell, B. A., “Effects of titanium doping in titanomagnetite on neptunium sorption and speciation” Environmental Science and Technology, 50(4), 1853-1858, 2016. DOI: 10.1021/acs.est.5b05339Powell, B. A., “An Overview of Geochemical Reactions Controlling Plutonium’s Environmental Mobility” Los Alamos Actinide Research Quarterly, LA-UR-16-28436, Los Alamos, NM, 2016
- Country of Publication:
- United States
- Language:
- English
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