Microwave preparation and adsorption properties of EDTA-modified cross-linked chitosan.

The article presents a study on microwave preparation and adsorption properties of ethylenediaminetetraacetate(EDTA)-modified cross-linked chitosan. A novel chitosan derivative was synthesized by the reaction of an intermediate of epichlorohydrin O-cross-linked chitosan with EDTA dianhydride under microwave irradiation. Its chemical structure was characterized by thermogravimetric and X-ray diffraction analysis. The study shows that the chitosan derivative had higher adsorption capacity for the same metal ion than the parent and cross-linked chitosan.