Uranium sorption on various forms of Ti02 - influence of surface area, surface charge and impurities

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dc.contributor.authorComarmond, MJen_AU
dc.contributor.authorPayne, TEen_AU
dc.contributor.authorHarrison, JJen_AU
dc.contributor.authorThiruvoth, Sen_AU
dc.contributor.authorMuller, Ken_AU
dc.date.accessioned2010-08-18T04:55:06Zen_AU
dc.date.available2010-08-18T04:55:06Zen_AU
dc.date.issued2010-04-18en_AU
dc.date.statistics2010-04-18en_AU
dc.description.abstractTitanium dioxide has properties that make it an excellent substrate for experimental study and theoretical development of adsorption models, including negligible solubility and a near neutral point of zero charge 1. A number of different forms of Ti-oxide have been used in experimental studies, including hydrous Ti-oxide, anatase, rutile and various commercially available samples that contain a mixture of anatase and rutile. The aim of our work is to investigate uranium sorption phenomena and the influence of surface area, surface charge and impurities for a range of thoroughly characterised Ti-oxide surfaces. We have undertaken uranium(VI) sorption studies on a number of commercially available Ti oxides, some of which were aggressively pre-treated to remove inherent impurities. Characterisations performed on the various Ti-oxides comprised a range of chemical and physical methods including XRD, XRF, ATR FT-IR, chemical assays, BET determinations, and electroacoustic measurements. The sorption of U on these Ti oxides was studied by a baTch sorption method and the effect of pH, ionic strength, mass loading, and U concentration on uranium sorption was also investigated for several of these Tioxides. We found that the sorption of uranium (VI) on these Tioxides was extremely strong and much greater than many other common environmental sorbents on a surface area basis. Aggressive pre-treatment of one Ti-oxide significantly altered its isoelectric point, but did not appear to significantly impact its sorption behaviour. Differences in sorption behaviour between the various Ti-oxides were related to the surface area of these materials. The data provide insights into the effect of different source materials and surface properties on radionuclide sorption, and will be useful in assessing data obtained in diverse experimental studies involving Ti oxides. en_AU
dc.identifier.citationComarmond, M. C. J., Payne, T., Harrison, J., Thiruvoth, S., & Muller, K. (2010). Uranium sorption on various forms of Ti02 - influence of surface area, surface charge and impurities. Lecture given at 16th Radiochemical Conference (Radchem 2010), 18th – 23rd April 2010, Marianske Lazne, Czech Republic. In Booklet of Abstracts Conference Programme (pp. s178).en_AU
dc.identifier.conferenceenddate23 April 2010en_AU
dc.identifier.conferencename16th Radiochemical Conference (Radchem 2010)en_AU
dc.identifier.conferenceplaceMarianske Lazne, Czech Republicen_AU
dc.identifier.conferencestartdate18 April 2010en_AU
dc.identifier.govdoc2428en_AU
dc.identifier.issn0009-2770en_AU
dc.identifier.otherREG.L17(Id: 194))en_AU
dc.identifier.paginations178en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2221en_AU
dc.language.isoenen_AU
dc.publisherCzech Chemical Societyen_AU
dc.subjectTitaniumen_AU
dc.subjectUraniumen_AU
dc.subjectSorptionen_AU
dc.subjectSurface areaen_AU
dc.subjectSolubilityen_AU
dc.subjectImpuritiesen_AU
dc.titleUranium sorption on various forms of Ti02 - influence of surface area, surface charge and impuritiesen_AU
dc.typeConference Abstracten_AU
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