Chinese Journal of Applied Chemistry

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Re(Ⅶ) Adsorption by Magnetic Cross-linked Chitosan Microspheres Modified with Diiobutylamine

LOU Zhenning, REN Fuqiang, WANG Jing, LI Yexia, ZHANG Qing, SHAN Weijun, XIONG Ying*   

  1. (Key Laboratory of Rare-scattered Elements of Liaoning Province,School of Chemistry,Liaoning University,Shenyang 110036,China)
  • Received:2013-11-29 Revised:2014-03-24 Published:2014-09-03 Online:2014-09-03
  • Contact: Ying Xiong

Abstract: The magnetic cross-linked chitosan microspheres were prepared using Fe3O4 nanoparticles as cores and chitosan(CS) as polymeric shell with diisobutylamine(FCS-DIBA) modification. For the Re(Ⅶ) species coexisting with Fe(Ⅲ), Zn(Ⅱ), Mn(Ⅶ) and Cu(Ⅱ), the FCS-DIBA adsorbent exhibits selectivity only for Re(Ⅶ) among coexisting heavy metals in pH=2. The maximum adsorption capacity for Re(Ⅶ) is up to 185 mg/g, The adsorption behavior fits the Langmuir isotherm model. The mechanism for these excellent adsorption characteristics was discussed.

Key words: rhenium, crab shells chitosan, chemical modification, biosorption

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