Résumé
In recent years, there has been growing interest in the focus on research to develop new hybrid materials capable of selectively extracting actinides [1]. Mesoporous silicas functionalized with organic ligands have been studied for this purpose. In this study, several ligands: Acetamide phosphonate (AcPhos), Propionamide phosphonate (PropPhos), Hydroxypyridine-N-oxide (Hopo), Tributyl phosphate (TBP) were compared to assess their sorption capacity towards U and Th under various acidic conditions. The impact of electron radiolysis of 10 MeV up to 4MGy on the sorption properties was also determined. All materials were characterized by SAXS, BET, TGA, NMR and microscopy techniques. This preliminary study shows that the AcPhos and ProPhos ligands exhibit interesting sorption capacities, even after radiolysis, which led to their selection for carrying out sorption tests on plutonium.