Combination of carboxymethyl chitosan-coated magnetic nanoparticles and chitosan-citrate complex gel beads as a novel magnetic adsorbent

Fwu Long Mi, Shao Jung Wu, Yung Chih Chen

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

Abstract Magnetic chitosan beads were synthesized by incorporating N,O-carboxymethyl chitosan-coated magnetic nanoparticles (NOCC-MNPs) into chitosan-citrate gel beads (CCGBs) for adsorbing Cu(II) ions. An increase of Cu(II) adsorption capacity was due to the combined chelation effects from the electron-donating functional groups in the CCGBs and NOCC-MNPs. Moreover, the paramagnetic susceptibility of Cu(II) citrate chelates could further improve the Cu(II) adsorption efficiency through the force of magnetic attraction. The adsorption data of the magnetic CCGBs fitted well with the Freundlich model, whereas the adsorption kinetics followed the pseudo-second-order kinetic model. The maximal adsorption capacity as estimated by the Langmuir model was 294.11 mg/g. The adsorption thermodynamic parameters indicated that the involved process should be spontaneous and exothermic.

Original languageEnglish
Article number10019
Pages (from-to)255-263
Number of pages9
JournalCarbohydrate Polymers
Volume131
DOIs
Publication statusPublished - Jun 25 2015

Keywords

  • Adsorption
  • Chitosan
  • Citrate
  • Magnetic nanoparticles

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics

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