Sorption of U(VI) from sulfate solutions with spherically granulated chitosans

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...

Full description

Saved in:
Bibliographic Details
Published in:Radiochemistry (New York, N.Y.) N.Y.), 2008-10, Vol.50 (5), p.515-522
Main Authors: Veleshko, A. N., Rumyantseva, E. V., Kulyukhin, S. A., Veleshko, I. E., Vikhoreva, G. A., Lobanov, N. S.
Format: Article
Language:English
Subjects:
Cellophane
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Chitosan
Crosslinking
Diffusion rate
Granular materials
Granulation
Mathematical analysis
Nuclear Chemistry
Process parameters
Sorbents
Sorption
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1066-3622
1608-3288
DOI:10.1134/S1066362208050147