Electron transfer during selenium reduction by iron surfaces in aqueous solution: High resolution X-ray absorption study

doi:10.1088/1742-6596/190/1/012191

Electron transfer during selenium reduction by iron surfaces in aqueous solution: High resolution X-ray absorption study

K O Kvashnina et al 2009 J. Phys.: Conf. Ser. 190 012191 (4pp) doi: 10.1088/1742-6596/190/1/012191

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K O Kvashnina1*, S M Butorin², D Cui³, J Vegelius², A Puranen⁴, R Gens⁵ and P Glatzel¹
¹ European Synchrotron Radiation Facility, BP220, 6 rue Jules Horowitz, 38043 Grenoble, France
² Department of Physics, Uppsala University, Box 530, 75121, Uppsala, Sweden
³ Studsvik AB,61182, Nykoping, Sweden & Department of Physical Inorganic and Structural Chemistry, Stockholm University, 10691, Stockholm, Sweden
⁴ Department of Chemistry, KTH, Royal Institute of Technology, 10044, Stockholm, Sweden
⁵ ONDRAF/NIRAS, 1210 Bruxelles, Belgium
E-mail: kristina.kvashnina@esrf.fr

Abstract. We present a study of selenate (SeO₄^2-) on an iron surface in ground water solution by X-ray absorption near-edge spectroscopy. Spectral sharpening is obtained by using the high energy resolution fluorescence detection technique that also efficiently suppresses the strong fluorescence signal from the Fe surface in the highly dilute samples (Se concentration < 3 ppm). We observe fully reduced Se on polished Fe surfaces while no changes are found for Se on oxidized Fe surface.

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Electron transfer during selenium reduction by iron surfaces in aqueous solution: High resolution X-ray absorption study

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