Journal
RADIATION PHYSICS AND CHEMISTRY
Volume 80, Issue 12, Pages 1391-1397Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.radphyschem.2011.06.013
Keywords
Chitosan beads; Acrylic acid; Radiation grafting; Sorption
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Radiation-induced grafting of acrylic acid onto chitosan beads was performed in solution at a dose rate of 20.6 Gy/min of cobalt-60 gamma rays. The effect of absorbed dose on grafting yield was investigated. The characterization of the grafted material was performed by FTIR spectroscopy and the swelling measurements at different pHs. The grafting yield increased with the increase in dose, it reached 80% at 40 kGy irradiation dose. The removal of Pb and Cd ions from aqueous solutions was investigated with both ungrafted and grafted chitosan beads. The sorption behavior of the sorbents was examined through pH, kinetics and equilibrium measurements. Grafted chitosan beads presented higher sorption capacity for both metal ions than unmodified chitosan beads. (C) 2011 Elsevier Ltd. All rights reserved.
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