Uranium adsorption on ferrihydrite - effects of phosphate and humic acid

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dc.contributor.authorPayne, ΤEen_AU
dc.contributor.authorDavis, JAen_AU
dc.contributor.authorWaite, TDen_AU
dc.date.accessioned2025-09-15T00:28:59Zen_AU
dc.date.available2025-09-15T00:28:59Zen_AU
dc.date.issued1996-12-01en_AU
dc.date.statistics2025-09-15en_AU
dc.descriptionPhysical copy held by ANSTO Library at DDC: 577.277/46.en_AU
dc.description.abstractUranium adsorption on ferrihydrite was studied as a function of pH in systems equilibrated with air, in the presence and absence of added phosphate and humic acid (HA). The objective was to determine the influence of PO43- and HA on uranium uptake. Below pH 7, the sorption of UO22+ typically increases with increasing pH (the 'low pH sorption edge'), with a sharp decrease in sorption above this pH value (the 'high pH edge'). The presence of ΣPO43- of 10-4 mol/L moved the low pH edge to the left by approximately 0.8 pH units. The PO43- was strongly bound by the ferrihydrite surface, and the increased uptake of U was attributed to the formation of ternary surface complexes involving both UO22+ and PO43-. The addition of HA (9 mg/L) increased U uptake at pH values below 7, with little effect at higher pH values. The positions of the pH edges were also affected by the ionic strength and total U content. These experiments show that sorption interactions involving PO43 and HA must be considered in order to model the behavior of U in natural systems, in which these components are often present. © 1996 Oldenbourg Wissenschaftsverlag GmbH.en_AU
dc.identifier.booktitleChemistry and migration behaviour of actinides and fission products in the geosphere : proceedings of the fifth international conference in Saint-Malo (France), 10-15 September 1995en_AU
dc.identifier.citationPayne, Τ. E., Davis, J. A., & Waite, T. D. (1996). Uranium adsorption on ferrihydrite - effects of phosphate and humic acid. Paper presented to Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere, proceedings of the Fifth International Conference Saint-Malo (France), 10-15 September 1995. In Radiochimica Acta, 74(s1), 239–244. doi:10.1524/ract.1996.74.special-issue.239en_AU
dc.identifier.conferenceenddate1995-09-15en_AU
dc.identifier.conferencenameChemistry and migration behaviour of actinides and fission products in the geosphere : proceedings of the fifth international conferenceen_AU
dc.identifier.conferenceplaceSaint-Malo, France, 10-15 September 1995en_AU
dc.identifier.conferencestartdate1995-09-10en_AU
dc.identifier.isbn9783486642513en_AU
dc.identifier.issn0033-8230en_AU
dc.identifier.issn2193-3405en_AU
dc.identifier.issues1en_AU
dc.identifier.journaltitleRadiochimica Actaen_AU
dc.identifier.pagination239-244en_AU
dc.identifier.urihttps://doi.org/10.1524/ract.1996.74.special-issue.239en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16495en_AU
dc.identifier.volume74en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherDe Gruyteren_AU
dc.subjectUraniumen_AU
dc.subjectPhosphatesen_AU
dc.subjectHumic acidsen_AU
dc.subjectpH Valueen_AU
dc.subjectAiren_AU
dc.subjectSorptionen_AU
dc.subjectEnvironmental effectsen_AU
dc.subjectCarbon dioxideen_AU
dc.subjectFerriteen_AU
dc.titleUranium adsorption on ferrihydrite - effects of phosphate and humic aciden_AU
dc.typeConference Paperen_AU
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