HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Effect of aqueous acetic, oxalic and carbonic acids on the adsorption of uranium(VI) onto alpha-alumina

Abstract : The prediction of the migration for radionuclides in geologic media requires a quantitative knowledge of retardation phenomena. For this purpose, the sorption of U(VI) onto a model mineral-–α-alumina—is studied here, including the effects of groundwater chemistry: pH and concentrations of small organic ligands (acetate, oxalate and carbonate anions). This work presents experimental evidence for the synergic sorption of uranium(VI) and the small organic ligands, namely sorption of cationic complexes onto alumina. Conversely, since its neutral and anionic complexes were not sorbed, U(VI) cation could also be desorbed as a result of the formation of neutral or anionic complexes in the aqueous phase. By using the ion-exchange theory, and a corresponding restricted set of parameters—exchange capacities and thermodynamic equilibrium constants—the whole set of sorption experiments of U(VI) cationic species onto the α-alumina was modelled under various chemical conditions.
Document type :
Journal articles
Complete list of metadata

Contributor : Maylis Lebeault Connect in order to contact the contributor
Submitted on : Monday, June 25, 2007 - 4:41:09 PM
Last modification on : Friday, February 4, 2022 - 4:16:05 PM

Links full text




C. Alliot, P. Vitorge, L. Bion, Florian Mercier. Effect of aqueous acetic, oxalic and carbonic acids on the adsorption of uranium(VI) onto alpha-alumina. New Journal of Chemistry, Royal Society of Chemistry, 2005, 29 (11), pp.1409-1415. ⟨10.1039/b508353b⟩. ⟨hal-00157276⟩



Record views