New hybrid silica based materials for the solid-liquid extraction of actinides

New hybrid silica based materials containing malonamide ligands have been prepared by sol-gel hydrolysis condensation of functionalised precursors. These hybrids proved to be highly efficient extracting solids which compare favorably to related silica materials. Hybrid silica materials, which should be very stable under highly acidic conditions and under gamma -irradiation, are interest for the extraction and treatment of highly radioactive aqueous nitric wastes. We with to report here our preliminary results on the preparation an use of new hybrid materials containing malonamide ligands and their use for solid- liquid extraction of Pu(IV) and Am(III) from aqueous wastes.