Chitosan was prepared by deacetylation of natural chelate polymer, chitin, and oligoglucosamine was prepared by degradation of chitosan. New glucosamine series chelate resin, poly(styrene-g-oligoglucosamine) was synthesized by the reaction of chloromethylated copolymer with oligoglucosamine. The adsorptivity of the heavy metal ions such as Hg₊₊, Cd₊₊, Pb₊₊ and Cr₆₊ to chitin, chitosan and Pst-g-OGA were investigated with the variation of pH. In the case of chitin, the adsortivities of the metal ions at pH range of 1.5-5.8 were in the following order Pb₊₊>Cd₊₊>Hg₊₊>Cr₆₊ ; and adsorptivities of the metal ions at pH range 2.5-7.0 to chitosan were in the following order : Hg₊₊>Pb₊₊>Cd₊₊>Cr₆₊. However the order to Pst-g-OGA was altered as follows : Pb₊₊>Hg₊₊>Cd₊₊>Cr₆₊. Generally, the adsorptivity of chitosan containing the ligand of primary amine group in its structure showed better adsorptivity than that of chitin. It was noteworthy that the adsorptivity of Pst-g-OGA was almost the same as that of chitin.

천연고분자킬레이트인 chitin을 deacetylation시켜 chitosan을 제조하고 이를 다시 degradation시켜 합성한 oligoglucosamine을 시티렌의 골격에 도입시켜서 제조한 새로운 glucosamine계 킬레이트수지인 poly(styrene-g-oligoglucosamine)에 대한 중금속이온들( Hg₊₊, Pb₊₊, Cd₊₊ 및 Cr₆₊)의 흡착특성을 검사하여 chitin 및 chitosan의 흡착능과 비교하였다. chitin의 경우 흡착능의 순서는 pH 1.5∼5.8에서 Pb₊₊>Cd₊₊>Hg₊₊>Cr₆₊이었고, chitosan의 경우는 pH 2.5∼7에서 Hg₊₊>Pb₊₊>Cd₊₊>Cr₆₊의 순으로 흡착능이 감소하였으며 새로 합성한 poly(styrene-g-oligoglucosamine)의 경우는 pH 2.3∼7에서 Pb₊₊>Hg₊₊>Cd₊₊>Cr₆₊의 순위였다. 일반적으로 유리 1차아민기를 가진 chitosan이 chitin보다 우수한 흡착능을 나타내고 있으며, 폴리스티렌의 oligoglucosamine계 수지가 chitin정도의 흡착능을 나타냄을 알 수 있었다.

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