Preparation and adsorption behavior for metal of chitosan crosslinked by dihydroxy azacrown ether

Abstract

Abstract A new type of crosslinked chitosan was prepared using Dihydroxy azacrown ether as the crosslinking agent. Its structure was confirmed by elemental analysis, Fourier transform infrared (FTIR) spectra analysis, solid‐state 13 C nuclear magnetic resonance (NMR) analysis, and X‐ray diffraction analysis. Its static adsorption properties for Ag + , Cd 2+ , Hg 2+ , and Co 2+ were studied. The experimental results showed that the Dihydroxy azacrown ether crosslinked chitosan has good adsorption capacities and high selectivity for adsorption of Ag + with the coexistence of Hg 2+ and Co 2+ . The selectivity coefficients of crosslinked chitosan are k / = 5.47, k / = 4.64, respectively. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 530–535, 2002