Biogenic non-crystalline U (IV) revealed as major component in uranium ore deposits

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dc.identifier.uri Bhattacharyya, Amrita Campbell, Kate M. Kelly, Shelley D. Roebbert, Yvonne Weyer, Stefan Bernier-Latmani, Rizlan Borch, Thomas 2017-07-17T07:35:03Z 2017-07-17T07:35:03Z 2017
dc.identifier.citation Bhattacharyya, A.; Campbell, K.M.; Kelly, S.D.; Roebbert, Y.; Weyer, S. et al.: Biogenic non-crystalline U (IV) revealed as major component in uranium ore deposits. In: Nature Communications 8 (2017), 15538. DOI:
dc.description.abstract Historically, it is believed that crystalline uraninite, produced via the abiotic reduction of hexavalent uranium (U (VI)) is the dominant reduced U species formed in low-temperature uranium roll-front ore deposits. Here we show that non-crystalline U (IV) generated through biologically mediated U (VI) reduction is the predominant U (IV) species in an undisturbed U roll-front ore deposit in Wyoming, USA. Characterization of U species revealed that the majority (-1/458-89%) of U is bound as U (IV) to C-containing organic functional groups or inorganic carbonate, while uraninite and U (VI) represent only minor components. The uranium deposit exhibited mostly 238 U-enriched isotope signatures, consistent with largely biotic reduction of U (VI) to U (IV). This finding implies that biogenic processes are more important to uranium ore genesis than previously understood. The predominance of a relatively labile form of U (IV) also provides an opportunity for a more economical and environmentally benign mining process, as well as the design of more effective post-mining restoration strategies and human health-risk assessment. eng
dc.description.sponsorship University of Wyoming
dc.language.iso eng
dc.publisher London : Nature Publishing Group
dc.relation.ispartofseries Nature Communications 8 (2017)
dc.rights CC BY 4.0 Unported
dc.subject crystalline uraninite eng
dc.subject hexavalent uranium eng
dc.subject.ddc 500 | Naturwissenschaften ger
dc.title Biogenic non-crystalline U (IV) revealed as major component in uranium ore deposits eng
dc.type article
dc.type Text
dc.relation.essn 2041-1723
dc.bibliographicCitation.volume 8
dc.bibliographicCitation.firstPage 15538
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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