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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/4154

Title: Uranium sorption on various forms fo titanium dioxide - influence of surface area, surface charge and impurities
Authors: Commarmond, MJ
Payne, TE
Harrison, JJ
Thiruvoth, S
Wong, HK
Aughterson, RD
Lumpkin, GR
Müller, K
Foerstendorg, H
Keywords: Uranium
Sorption
Titanium
Impurities
SPECTROSCOPY
IONS
Issue Date: 1-Jul-2011
Publisher: American Chemical Society
Citation: Comarmond, M. J., Payne, T. E., Harrison, J. J., Thiruvoth, S., Wong, H. K., Aughterson, R. D., Lumpkin, G. R., Muller, K., Foerstendorf, H., (2011). Uranium Sorption on Various Forms of Titanium Dioxide - Influence of Surface Area, Surface Charge, and Impurities. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 45(13), 5536-5542.
Abstract: Titanium dioxide (TiO(2)) has often served as a model substrate for experimental sorption studies of environmental contaminants. However, various forms of Ti-oxide have been used, and the different sorption properties of these materials have not been thoroughly studied. We investigated uranium sorption on some thoroughly characterized TiO(2) surfaces with particular attention to the influence of surface area, surface charge, and impurities. The sorption of U(VI) differed significantly between samples. Aggressive pretreatment of one material to remove impurities significantly altered the isoelectric point, determined by an electroacoustic method, but did not significantly impact U sorption. Differences in sorption properties between the various TiO(2) materials were related to the crystallographic form, morphology, surface area, and grain size, rather than to surface impurities or surface charge. In-situ attenuated total reflection Fourier-transform infrared (ATR FT-IR) spectroscopic studies showed that the spectra of the surface species of the TiO(2) samples are not significantly different, suggesting the formation of similar surface complexes. The data provide insights into the effect of different source materials and surface properties on radionuclide sorption. © 2011, American Chemical Society
URI: http://dx.doi.org/10.1021/es201046x
http://apo.ansto.gov.au/dspace/handle/10238/4154
ISSN: 0013-936X
Appears in Collections:Journal Articles

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