Approach of uranium sorption mechanisms on chitosan and glutamate glucan by IR and l3C-NMR analysis
Résumé
Uranyl sorption performances of chitosan and glutamate glucan, a modified chitosan, have been extensively studied. This work deals with the mechanisms involved in the phenomenon. Infra-red and 13C-NMR studies allow the functional sites involved in the sorption to be identified. Amine sites are the main sorbing sites, but modification of spectra in the range of absorption of carboxylic functions indicates that these functions are also involved in the process. Carboxylic sites act directly by ion exchange or sorption of uranyl ions or by a combined effect with sorption on amine sites