Uranyl Peroxide Nanocluster (U60) Persistence and Sorption in the Presence of Hematite
- Univ. of Notre Dame, IN (United States). Dept. of Civil and Environmental Engineering and Earth Sciences
The presence of uranium-based nanomaterials in environmental systems may significantly impact our current understanding of the fate and transport of U(VI). Sorption of the uranyl peroxide nanocluster [(UO2)(O2)(OH)]6060– (U60) to hematite (α-Fe2O3) was studied using batch sorption experiments with varying U60, hematite, and alkali electrolyte (i.e., NaCl, KCl, and CsCl) concentrations. Data from electrospray ionization mass spectrometry and centrifugal microfiltration revealed that U60 persisted in the presence of hematite and the background electrolyte for at least 120 days. K+ ions were removed from solution with uranium whereas Li+ ions remained in solution, indicating that the U60 cluster behaved like an anion and that the Li+ ions did not play a significant role in the sorption mechanism. Analysis of the reacted mineral surface using X-ray photoelectron and Raman spectroscopies confirmed the presence of U(VI) and uranyl species with bridged peroxo groups associated with the mineral surface. These results indicate that uranyl peroxide nanoclusters may persist in the aqueous phase under environmentally relevant conditions for reasonably long periods of time, as compared to that of the uranyl cation.
- Research Organization:
- Energy Frontier Research Centers (EFRC), Washington, D.C. (United States). Materials Science of Actinides (MSA)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0001089
- OSTI ID:
- 1470352
- Journal Information:
- Environmental Science and Technology, Vol. 52, Issue 5; Related Information: MSA partners with University of Notre Dame (lead); University of California, Davis; Florida State University; George Washington University; University of Michigan; University of Minnesota; Oak Ridge National Laboratory; Oregon state University; Rensselaer Polytechnic Institute; Savannah River National Laboratory; ISSN 0013-936X
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Evidence for non-electrostatic interactions between a pyrophosphate-functionalized uranyl peroxide nanocluster and iron (hydr)oxide minerals
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journal | January 2019 |
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