Abstract
Sorption of U(VI) from sulfate solutions with spherically granulated chitosans was examined. It was shown that the best sorption and kinetic characteristics are exhibited by freshly formed and cross-linked chitosan granules. The total static exchange capacity for the freshly formed granules was 0.7 mmol of U(VI) per gram of dry sorbent. The diffusion coefficients and similarity criteria describing the diffusion process parameters were calculated. It was found that, irrespective of the method by which the granules were prepared (freshly formed, cross-linked, air-dried), the dominating process is U(VI) sorption on the surface, mainly controlled by external diffusion. Physicomechanical tests of the films of the irradiated chitosan and cellophane (absorbed dose 100–250 kGy) revealed higher strength characteristics of the irradiated chitosan.
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Original Russian Text © A.N. Veleshko, E.V. Rumyantseva, S.A. Kulyukhin, I.E. Veleshko, G.A. Vikhoreva, N.S. Lobanov, 2008, published in Radiokhimiya, 2008, Vol. 50, No. 5, pp. 446–453.
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Veleshko, A.N., Rumyantseva, E.V., Kulyukhin, S.A. et al. Sorption of U(VI) from sulfate solutions with spherically granulated chitosans. Radiochemistry 50, 515–522 (2008). https://doi.org/10.1134/S1066362208050147
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DOI: https://doi.org/10.1134/S1066362208050147