Spectroscopic investigation of uranium sorption on soil surface using X-ray photoelectron spectroscopy |
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| Authors: | Sabyasachi Rout P. M. Ravi Ajay Kumar R. M. Tripathi |
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| Affiliation: | 1.Health Physics Division,Bhabha Atomic Research Centre,Mumbai,India;2.Homi Bhabha National Institute,Mumbai,India |
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| Abstract: | A study was carried out to understand the sorption of uranium (U) onto soil surface and identify the species of U on soil surface using X-Ray Photoelectron Spectroscopy (XPS). For the study soil was amended with uranyl nitrate and surface speciation study was carried out by investigating the energy region for U in spectrum. Analysis of spectrum revealed that U is present in U(VI) state. Deconvolution of XPS spectrum of U(VI) sorbed on soil surface revealed that U(VI) species such as, UO2 2+ and (UO2)x(OH) y (2x?y)+ form complex with silanol, aluminol and goethite sites. The possible surface complexation is: ≡Al(OH)2UO2 2+, ≡SiO2UO2, ≡SiO2(UO2)3(OH)5 and ≡Fe(OH)2UO2. |
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