Preparation and adsorption behavior for metal of chitosan crosslinked by dihydroxy azacrown ether
2002
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 13C nuclear magnetic resonance (NMR) analysis, and X-ray diffraction analysis. Its static adsorption properties for Ag+, Cd2+, Hg2+, and Co2+ 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 Hg2+ and Co2+. 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
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