Adsorption of Cupric Ions on Chitosan

키토산을 이용한 중금속(Cu2+) 흡착

  • Kim, Tae Young (Department of Chemical Engineering, Chonnam National University) ;
  • Kim, Kyoung Jin (Department of Chemical Engineering, Chonnam National University) ;
  • Moon, Hee (Faculty of Applied Chemistry, Chonnam National University) ;
  • Yang, Jai Ho (Department of Chemical Engineering, Chonnam National University)
  • 김태영 (전남대학교 화학공학과) ;
  • 김경진 (전남대학교 화학공학과) ;
  • 문희 (전남대학교 응용화학부) ;
  • 양재호 (전남대학교 화학공학과)
  • Received : 1998.09.18
  • Accepted : 1998.11.21
  • Published : 1999.04.10

Abstract

The chitosan solution was prepared by dissolving chitosan into 2 wt % aqueous acetic acid solution and then chitosan beads were made by sol-gel method. The average molecular weight and the degree of deacetylation of the chitosan used here were determined to be $8.2{\times}10^5$ and 85%, respectively. chitosan beads were highly porous which was confirmed by SEM photography and BET. Adsorption equilibrium of $Cu^{2+}$ on porous chitosan beads could be represented by Sips equation. The diffusion of cupric ions in the chitosan beads could be explained by pore and surface diffusion mechanisms. Adsorption dynamics of $Cu^{2+}$ in fixed-bed could be simulated by linear driving force approximation (LDFA). It was proven that porous chitosan beads manufactured in this work are good adsorbents for the removal of $Cu^{2+}$.

Keywords

Chitosan;Chitosan Bead;Adsorption;Cupric Ions

Acknowledgement

Supported by : 전남대학교

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