Grafting of Some Carbohydrates with Multi-Group Chelating Monomer

Graft copolymerization reactions onto some polysaccarides were carried out using acryloylcyanoacetohydrazide (ACAH) as chelating monomer. Different grafting variables onto chitin were studied, namely time, temperature, concentrations of monomer and initiator. Grafting by the prementioned chelating monomer was also carried out on chitosan and bagasse raw materials for different periods. The grafting parameters obtained were compared with those values of PACAH-grafted chitin and polyacrylonitrile-grafted polysaccharides. FTIR-spectra of the grafted polysaccharides were also studied to evidence the grafting. The PACAH- and PAN-grafted carbohydrates with the same range as molecular substitution (M.S. 0.8- 1.2) were compared their ability to chelate some metal ions, namely Cu (II), Mn(II), Fe(III) and Cr(III). The adsorption ability of metals onto the grafted polysaccharides was also compared with that obtained from previously examined modified polysaccharides, under nearly the same adsorption conditions.