Uranium(VI) binding by pine needles prior and after chemical modification
SourceJournal of Radioanalytical and Nuclear Chemistry
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Adsorption of U(VI) by pine needles prior and after carbonization and following oxidation has been investigated by batch-type experiments and characterized by FTIR and SEM measurements. The experimental data have been fitted by the Langmuir adsorption isotherm and the highest adsorption efficiency was observed for the carbonized and surface oxidized material, followed by the non-treated pine needles and the carbonized material. The highest U(VI) adsorption observed after surface oxidation of the carbonized material is attributed to the presence of carboxylic moieties, which possess increased affinity for the U(VI) cations and form inner-sphere surface complexes.