羧甲基交联壳聚糖树脂的合成表征及其应用英文.pdfVIP

19 4 Vol.19 No.4 2006 12 JOURNAL OF NINGBO UNIVERSITY ( NSEE ) Dec. 2006 :1001-5132200604-0503-06 Synthesis and Characteristics of Cross-linked Chitosan Resin and its Application 1 2 SHAO Ying , YUAN You-ling ( Faculty of Science, Ningbo University, Ningbo 315211, China ) Abstract: The carboxymethyl cross-linked chitosan resin (C-C-CTS), which remained stable in acidic medium and did not lose its chelation property comparing with ordinary chitosan resin, was synthesized by simple two-step procedures. Chitosan was cross-linked by epoxy chlorinated propane first, then carboxy methylated. The structure of C-C-CTS was conformed by infrared and X-ray photoelectron spectroscopy. The C-C-CTS resin has good chelated sorption affinity for heavy metal ions. The sorption capacities of C-C-CTS for Pb (II), Cu (II) and Zn (II) were measured to be 8.73, -1 10.12 and 4.89 mg·g resin respectively. The C-C-CTS resin has good selectivity for Pb (II), Cu (II) and Zn (II) at different pH conditions. The sorption mechanism of Pb (II) on C-C-CTS resin was also discussed. Key words: carboxymethyl cross-linked chitosan resin; Pb(II); Cu(II); Zn(II); resin structure characterization; sorption mechanism CLC number: O636.1; X703 Document code: A Most of heavy metals are highly too toxic and from crustacean shells[2,3]. Adsorption is now are not bio