Interaction between uranium(VI) and siderite (FeCO3) surfaces in carbonate solutions
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Aurélie Ithurbide
Abstract
In order to assess the security of a long-term disposal of nuclear spent fuel, the prediction of radionuclide migration is needed. This paper presents the interaction between uranium(VI) and siderite surfaces, an iron carbonate present both in the near- and far-field of the storage, in carbonate solutions. The amount of uranium on the surface was determined after the interaction by alpha spectrometry. It appeared that the amount of uranium(VI) dropped with high pH and carbonate concentration, likely because of the predominance of UO2(CO3)22- and UO2(CO3)34- complexes in solution. The U4f X-ray photoelectron spectrum clearly highlighted that uranium present on the film has two different oxidation states and thus that uranium(VI) has been partially reduced by siderite.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Artikel in diesem Heft
- Radiochemical analysis of a copper beam dump irradiated with high-energetic protons
- Sorption and desorption of uranium(VI) on silica: experimental and modeling studies
- Adsorption of humic acid and Eu(III) to multi-walled carbon nanotubes: Effect of pH, ionic strength and counterion effect
- Separation of actinides using hollow fiber supported liquid membranes
- Towards an optimized flow-sheet for a SANEX demonstration process using centrifugal contactors
- Extraction of astatine-211 in diisopropylether (DIPE)
- Extraction of niobium and tantalum isotopes using organophosphorus compounds. Part I – Extraction of “carrier-free” metal concentrations from HCl solutions
- Extraction of niobium and tantalum isotopes using organophosphorus compounds. Part II – Extraction of “carrier-free” concentrations from HCl/LiCl solutions
- Interaction between uranium(VI) and siderite (FeCO3) surfaces in carbonate solutions
