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Polystyrene-Divinyl benzene copolymer를 담체로 한 oligoglucosamine 유도체의 제조 및 흡착특성
박세훈 ( Se Hoon Park ),강학수 ( Hahk Soo Kang ),이영기 ( Young Gi Lee ),손태일 ( Tae Il Son ) 한국키틴키토산학회 2003 한국키틴키토산학회지 Vol.8 No.1
N/A Chitosan was prepared by deacetylation of natural chelate polymer, chitin, with 40% aqueous sodium hydroxide solution and oligoglucosamine was prepared by degradation of chitosan with concentrated HCI. New glucosamine series chelate resin(SG-resin) was synthesized by chloromethylation of styrene-DVB copolymer(3% DVB) with chloromerhylmethyl ether and SnCl4, followed by reacting of oligoglucosamine with chloromethylated copolymer. Absorptivities of the heavy metallic ions such as Hg^(++), Pb^(++), Cr^(++), and Cr^(++) ions to chitin, chitosan, SG-resin were investigated with variation of pH. In the case of chitin, the adsoptivity at below pH 5.8 was in order of following sequence Ph^(++)>Cd^(++)>Hg^(++)>Cr^(+6) and showed selectivity(100%) at above pH 4.9 and suddenly decreased at below this pH. To Cd^(++) ion the absorptivity tendency showed maximum at pH 4.0. Comparing the absorptivity of the chitosan with that of the chitin, it showed that ahsorptivity of chitosan was improved more than that of chitin, at above pH 2.5 in order of following sequence Hg^(++)>Ph^(++)>Cd^(++)>Cd^(+6), Absorptivity to Hg^(++) ion showed about 90% independent on pH variation. Absqtivity of the SG-resin was in the order following sequence : Pb^(++)>Hg^(++)>Cd^(++)>Cr^(+6) at above pH 2.3 and decreased comparing with that of the chitin or chitosan. To Pb^(++), Hg^(++), Cd^(++) ion the adsorption tendency was improved as the pH value war increased. In the adsorption excellent of Cd^(++), Cr^(+6) ions (100 ppm) to the chitin, chitosan, SG-resin under coexistence with 1.000 ppm of Na^(+) and Ca^(++) ions, respectively, it was observed that the absorptivity of Cd^(++), Cr^(+6) ions were not affected by these common ions.