Preparation and Characterization of Hydrogel based on Chitosan for Removal of Heavy Metal Ions

The present work describes , graft copolymerization of crotonic acid (CA) and acrylamide (AAm) mixtures onto chitosan (CS) using ceric ammonium nitrate Ce (IV) as initiator in presence of methylene bisacrylamide (MBA) as a crosslinker .The prepared hydrogels were hydrolyzed by alkaline hydrolysis.The structure of the prepared hydrogels were investigated by FTIR before and after hydrolysis. The swelling behaviors of the prepared hydrogel were measured. The results showed that the sample containing high ratio of (CA), showed high swelling before hydrolysis. The ability of the prepared copolymer hydrogels for adsorption metal ions such as Cr (III) and Co (II) was performed. The influence pH on the swelling behavior during metal ions uptake has been observed.