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Synthesis and adsorption properties of chitosan-crown ether resins

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Abstract

Two kinds of novel chitosan-crown ether resins, Schiff base type chitosan-benzo-15-crown-5 (CTS-B15) and chitosan-benzo-18-crown-6 (CTS-B18), were synthesized through the reaction between -NH2 in chitosan and —CHO in 4′-formyl benzo-crown ethers. Their structures were characterized by elemental analysis and FT-IR spectra analysis. The elemental analysis results show that the mass fractions of nitrogen in CTS-B15 and CTS-B18 are much lower than those of chitosan. The results of FT-IR spectra of CTS-B15 and CTS-B18 reveal that there exist characteristic peak of C=N, N-H and Ar, and characteristic peak of pyr anoside in the chain of chitosan-crown ether resins, showing that the structures of chitosan-crown ethers are as expected. The adsorption properties of CTS-B15 and CTS-B18 for Pd2+, Cu2+ and Hg2+ were studied and the experimental results show that these adsorbents have both good adsorption characterization and especially high particular adsorption selectivity for Pd2+ when Cu2+ and Hg2+ are in coexistence, and the coefficients of selectivity of CTS-B15 and CTS-B18 for metal ions are K Pd 2+ /Cu 2+=7.56, K Pd 2+ /Hg 2+=68.00, K Cu 2+ /Hg 2+=9.00 and K Pd 2+ /Cu 2+=6.00, K Pd 2+ /Hg 2+=19.00, K Cu 2+ /Hg 2+=3.00, respectively.

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Authors and Affiliations

  1. College of Metallurgical Science and Engineering, Central South University, 410083, Changsha, China

    Peng Chang-hong, Chen Yi-feng & Tang Mo-tang

Authors
  1. Peng Chang-hong
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  2. Chen Yi-feng
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  3. Tang Mo-tang
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Additional information

Foundation item: Project Supported by State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-environmental Science, the Chinese Academy of Science(2001)

Biography of the first author: PENG Chang-hong, PhD, associate professor, born in 1966, majoring in environmental materials and metallurgical environment engineering.

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Peng, Ch., Chen, Yf. & Tang, Mt. Synthesis and adsorption properties of chitosan-crown ether resins. J Cent. South Univ. Technol. 10, 103–107 (2003). https://doi.org/10.1007/s11771-003-0048-0

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  • DOI: https://doi.org/10.1007/s11771-003-0048-0

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