Grafting of some carbohydrates with multigroup chelating monomer

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