Show simple item record

dc.contributor.authorVázquez-Ortega, Angélica
dc.contributor.authorPerdrial, Nicolas
dc.contributor.authorReinoso-Maset, Estela
dc.contributor.authorRoot, Robert A.
dc.contributor.authorO’Day, Peggy A.
dc.contributor.authorChorover, Jon
dc.date.accessioned2021-07-01T01:13:57Z
dc.date.available2021-07-01T01:13:57Z
dc.date.issued2021-08
dc.identifier.citationVázquez-Ortega, A., Perdrial, N., Reinoso-Maset, E., Root, R. A., O’Day, P. A., & Chorover, J. (2021). Phosphate controls uranium release from acidic waste-weathered Hanford sediments. Journal of Hazardous Materials, 416.en_US
dc.identifier.issn0304-3894
dc.identifier.doi10.1016/j.jhazmat.2021.126240
dc.identifier.urihttp://hdl.handle.net/10150/660355
dc.description.abstractMineral dissolution and secondary phase precipitation may control the fate of inorganic contaminants introduced to soils and sediments during liquid waste discharges. When the solutions are aggressive enough to induce transformation of native minerals, incorporated contaminants may be released during dissolution due to percolation of meteoric waters. This study evaluated the release of uranium (U) from Hanford sediments that had been previously reacted for 180 or 365 days with liquid waste solutions containing U with and without 3 mM dissolved phosphate at pH 2 and 3. Flow-through column experiments were conducted under continuous saturated flow with a simulated background porewater (BPW; pH ~7) for 22 d. Up to 5% of the total U was released from the sediments reacted under PO4-free conditions, attributable to the dissolution of becquerelite and boltwoodite formed during weathering. Contrastingly, negligible U was released from PO4-reacted sediments, where meta-ankoleite was identified as the main U-mineral phase. Linear combination fits of U LIII-edge EXAFS spectra of sediments before and after BPW leaching and thermodynamic calculations suggest that the formed becquerelite and meta-ankoleite transformed into schoepite and a phosphuranylite-type phase, respectively. These results demonstrate the stabilization of U as recalcitrant uranyl minerals formed in sediments and highlight the key role of PO4 in U release at contaminated sites.en_US
dc.description.sponsorshipU.S. Department of Energyen_US
dc.language.isoenen_US
dc.publisherElsevier BVen_US
dc.rightsPublished by Elsevier B.V.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en_US
dc.subjectFlow-through columnsen_US
dc.subjectHanford siteen_US
dc.subjectMineral transformationen_US
dc.subjectPhosphateen_US
dc.subjectUranium mineralsen_US
dc.titlePhosphate controls uranium release from acidic waste-weathered Hanford sedimentsen_US
dc.typeArticleen_US
dc.contributor.departmentDepartment of Environmental Science, University of Arizonaen_US
dc.identifier.journalJournal of Hazardous Materialsen_US
dc.description.note24 month embargo; available online 27 May 2021en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal accepted manuscripten_US
dc.identifier.piiS0304389421012048
dc.source.journaltitleJournal of Hazardous Materials
dc.source.volume416
dc.source.beginpage126240


Files in this item

Thumbnail
Name:
U_Desorption_Manuscript_Narrat ...
Embargo:
2023-05-27
Size:
1.095Mb
Format:
PDF
Description:
Final Accepted Manuscript

This item appears in the following Collection(s)

Show simple item record