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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received June 14, 2004
Accepted September 3, 2004

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Selective Biosorption of Mixed Heavy Metal Ions using Polysaccharides

Bong Chul Son Kyungmoon Park¹ Seung Hoon Song² Young Je Yoo^†

School of Chemical Engineering, Seoul National University, Seoul 151-742, Korea ¹Department of Chemical System Engineering, Hongik University, Jochiwon, Chungnam 339-701, Korea ²Bio-MAX Institute, Seoul National University, Seoul 151-742, Korea

Korean Journal of Chemical Engineering, November 2004, 21(6), 1168-1172(5), 10.1007/BF02719489

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Abstract

Although much research has been conducted on the separation of single species of heavy metal, the selective adsorption of two or more heavy metals in mixture is relatively little known. In this study, polysaccharide beads were prepared to selectively remove the targeted heavy metal ion from mixture. Among the biomasses, polysaccharide was examined due to its low cost and easy accessibility. In a single metal ion system, chitosan, λ-carrageenan, and alginic acid showed high affinity to mercury, copper, and lead, respectively. In the ion mixture, the same trend shown in the single metal ion solution was observed. The optimum electrolyte concentraion was investigated to adsorb the metal ion selectively, and it was possible to remove the targeted metal ion selectively with chitosan, alginic acid and λ-carrageenan at 1 mmol concentration of electrolyte. In order to demonstrate the feasibility of selective biosorption, two packed-bed reactors in series containing chitosan and alginic acid beads in each were studied and selective adsorption to Hg²⁺ and Pb²⁺, respectively, was observed.

Keywords

Selective Biosorption Polysaccharides Heavy Metal Ion Bioseparation

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