Application of chelating weak base resin Dowex M4195 to the recovery of uranium from mixed sulfate/chloride media

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dc.contributor.authorOgden, MDen_AU
dc.contributor.authorMoon, EMen_AU
dc.contributor.authorWilson, Aen_AU
dc.contributor.authorPepper, SEen_AU
dc.date.accessioned2023-11-07T04:48:14Zen_AU
dc.date.available2023-11-07T04:48:14Zen_AU
dc.date.issued2017-06-01en_AU
dc.date.statistics2023-11-06en_AU
dc.description.abstractThe use of untreated seawater or bore water in uranium mineral processing circuits may represent a cheaper and more sustainable water resource for Australia’s mining operations. Using present technologies, the increased salinity from these water sources results in decreased uranium extraction and increased extraction of impurities. There is incentive to overcome these challenges, either through new technologies, or repurposing existing technologies. The ion exchange behaviour of U from sulfate media on the weakly basic chelating resin Dowex M4195 (bis-picolylamine functionality) and the effect of competing chloride and impurity metal ions (Th, Fe, Al, Cu, Ni) has been studied. Experiments to determine acid, and sulfate media behaviour, and extraction thermodynamics including the effect of increasing chloride concentration upon extraction behaviour were carried out. Dowex M4195 was found to have pK1 and pK2 values at 4.13 ± 0.04 and 2.1 ± 0.1 determined at 1.0 M NaCl. Dowex M4195 shows affinity for U(VI) over Fe3+ and Al3+ in sulfuric acid media with a U(VI) pH50 a full pH unit below that of Fe3+ at 0.17 and 1.82 respectively. With increasing chloride concentrations U and Th extraction is suppressed but Fe extraction increases. At the highest chloride concentrations explored Fe is preferentially extracted over U, and Th is not extracted at all. As chloride concentration increases the extraction of U passes through a minimum (40%) before increasing to around 60% for 4.0 M chloride at pH 1.80. Al3+ is not extracted by M4195 under any conditions explored. Dowex M4195 does show high selectivity for Cu and Ni over everything else. ©2017 Elsevier B.Ven_AU
dc.description.sponsorshipThe authors would like to acknowledge the members of the Separations and Nuclear Chemical Engineering Research (SNUCER) group at the University of Sheffield who all assisted with this work in some capacity. Thank you to Prof. Neil Hyatt and Dr. Claire Corkhill in MIDAS, University of Sheffield for use of analytical equipment. Thank you to Dr Gabriella Kakonyi at the Kroto Research Institute at the University of Sheffield for ICP-MS analysis. Funding was provided by the Department of Chemical and Biological Engineering at The University of Sheffield, as part of their start-up scheme. The work presented here follows on from a pilot study conceived by M. Ogden and conducted by M. Ogden and A. Wilson when they were based at ANSTO Minerals (Australian Nuclear Science and Technology Organisation).en_AU
dc.identifier.citationOgden, M. D., Moon, E. M., Wilson, A., & Pepper, S. E. (2017). Application of chelating weak base resin Dowex M4195 to the recovery of uranium from mixed sulfate/chloride media. Chemical Engineering Journal, 317, 80-89. doi:10.1016/j.cej.2017.02.041en_AU
dc.identifier.issn1385-8947en_AU
dc.identifier.journaltitleChemical Engineering Journalen_AU
dc.identifier.pagination80-89en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15173en_AU
dc.identifier.volume317en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.relation.urihttps://doi.org/10.1016/j.cej.2017.02.041en_AU
dc.subjectSulfatesen_AU
dc.subjectChloridesen_AU
dc.subjectUraniumen_AU
dc.subjectChelating agentsen_AU
dc.subjectResinsen_AU
dc.subjectAnionsen_AU
dc.subjectIon exchangeen_AU
dc.subjectMass transferen_AU
dc.titleApplication of chelating weak base resin Dowex M4195 to the recovery of uranium from mixed sulfate/chloride mediaen_AU
dc.typeJournal Articleen_AU
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