Chitosan has been used widely as an adsorbent for transition metal ions and organic species because the amino and hydroxy groups on chitosan chains can serve as the coordination and reaction sites(Chang and Juang, 2004; Miretzky and Cirelli, 2009).However, the adsorption of chitosan for metal ions will be made against in strong acid or basic condition.Thus, chemical modifications of the chitosan heads are made by more and more researchers(Kurita, 2006; Wu et al.., 2010).