Sorption of uranyl ions on titanium oxide studied by ATR-IR spectroscopy

Attenuated Total Reflection - Infrared Spectroscopy Applied to the Study of Mineral - Aqueous Electrolyte Solution Interfaces: A General Overview and a Case Study

“…1.4 to lower wavenumbers. Thus, a good signal can be obtained for bands located between 850 and 950 cm -1 (Lefèvre et al, 2008) using the same 25-reflection crystal. It can be useful to avoid interferences with bands around 1650 cm -1 since D 2 O bending is located at 1209 cm -1 (Venyaminov and Prendergast, 1997).…”

Sorption of U(VI) at the TiO2–water interface: An in situ vibrational spectroscopic study

“…In the investigation of sorption phenomena, TiO 2 was found to be important as a trace constituent in some minerals (Payne et al, 2004). Moreover, it is often taken as a model oxide due to its high stability, its low solubility over a wide pH range, and its well-known structure and surface properties (Dixon and Weed, 1989;Tochiyama et al, 1996;Jakobsson and Albinsson, 1998;Lefèvre et al, 2008). TiO 2 polymorphs occur as the tetragonal forms anatase and rutile and as orthorhombic brookite.…”

“…At lower concentrations, a bidentate inner-sphere complex onto two bridging oxygen atoms has been proposed, with another complex at higher U(VI) surface concentration bound onto one top and one bridging oxygen atom (Perron et al, 2006;Drot et al, 2007;Vandenborre et al, 2007). Recently, the formation of only one type of surface complex, possibly a trimer was proposed for a mixed anatase and rutile sample with a higher percentage of sorbed U(VI) (Lefèvre et al, 2008). However, the sorption mechanisms of U(VI) on anatase and rutile have not been comparatively studied in detail up to now.…”

Sorption and Speciation of Uranium on Silica Colloids

“…For uranium sorption, different spectroscopic speciation methods such as TRLIF [9][10][11], FT-IR spectroscopy [12,13], EXAFS [11,13,14], and XPS [15] could be applied because of the high solubility of U(VI) and the possibility of performing sorption experiments at relatively high total metal concentration. This would be impossible for Pu(IV) or other low soluble radionuclides.…”