Reduction of U (VI) by Fe (II) during the Fe (II) - accelerated transformation of ferrihydrite

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dc.contributor.authorBoland, DDen_AU
dc.contributor.authorCollins, RNen_AU
dc.contributor.authorGlover, CJen_AU
dc.contributor.authorPayne, TEen_AU
dc.contributor.authorWaite, TDen_AU
dc.date.accessioned2014-10-29T00:22:53Zen_AU
dc.date.available2014-10-29T00:22:53Zen_AU
dc.date.issued2014-08-19en_AU
dc.date.statistics2014-10-29en_AU
dc.description.abstractX-ray absorption spectroscopy has been used to study the reduction of adsorbed U(VI) during the Fe(II)-accelerated transformation of ferrihydrite to goethite. The fate of U(VI) was examined across a variety of pH values and Fe(II) concentrations, with results suggesting that, in all cases, it was reduced over the course of the Fe(III) phase transformation to a U(V) species incorporated in goethite. A positive correlation between U(VI) reduction and ferrihydrite transformation rate constants implies that U(VI) reduction was driven by the production of goethite under the conditions used in these studies. This interpretation was supported by additional experimental evidence that demonstrated the (fast) reduction of U(VI) to U(V) by Fe(II) in the presence of goethite only. Theoretical redox potential calculations clearly indicate that the reduction of U(VI) by Fe(II) in the presence of goethite is thermodynamically favorable. In contrast, reduction of U(VI) by Fe(II) in the presence of ferrihydrite is largely thermodynamically unfavorable within the range of conditions examined in this study. © 2014, American Chemical Society.en_AU
dc.identifier.citationBoland, D. D., Collins, R. N., Glover, C. J., Payne, T. E., & Waite, T. D. (2014). Reduction of U (VI) by Fe (II) during the Fe (II) - accelerated transformation of ferrihydrite. Environmental Science & Technology, 48(16), 9086-9093. doi:10.1021/es501750zen_AU
dc.identifier.govdoc5788en_AU
dc.identifier.issn0013-936Xen_AU
dc.identifier.issue16en_AU
dc.identifier.journaltitleEnvironmental Science & Technologyen_AU
dc.identifier.pagination9086-9093en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/es501750zen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5963en_AU
dc.identifier.volume48en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectCatalysisen_AU
dc.subjectAqueous solutionsen_AU
dc.subjectUraniumen_AU
dc.subjectActinidesen_AU
dc.subjectOxide mineralsen_AU
dc.titleReduction of U (VI) by Fe (II) during the Fe (II) - accelerated transformation of ferrihydriteen_AU
dc.typeJournal Articleen_AU
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