Journal of environmental and Sanitary engineering (환경위생공학)

Korean Society for Environmental Sanitary Engineers (대한환경위생공학회)
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Synthesis of N-Methylthiobenzyl-Chitosan Beads and It's Selective Adsorption Abilities of Metal Ions

N-Methylthiobenzyl-Chitosan Bead의 합성과 금속이온의 선택적 흡착능력

  • 최한영 (서울보건대학교 환경보건학과) ;
  • 한상문 (이화여자대학교 약학과) ;
  • 안병제 (동국대학교 화학과) ;
  • 이성호 (서울보건대학교 환경보건학과) ;
  • 유국현 (계명대학교 환경학부) ;
  • 이승진 (이화여자대학교 약학과)
  • Published : 2001.06.01
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Abstract

Cross linked chitosan beads showed high selective adsorption abilities in order of $Au^{3+}$ > $Hg^{2+}$ > $Cu^{2+}$ > $Cd^{2+}$ > $Pt^{4+}$ > ${UO_2}^{2+}$ ions in mixed solution of various metal ions at pH 4.5. N-methyltyiobenzylated chitosan beads(MTB-chitosan beads) were prepared treating with p-(methylthio) benzaldehyde after cross linking of chitosan beads to give them a high selectivity in adsorption of metal ions. The MTB-chitosan beads demonstrated their selectivity on precious metals among various metal ions distinctively. Particularly, the MTB-chitosan had a peculiar selective adsorption on $Pd^{2+}$, $Au^{2+}$, and $Hg^{2+}$ions whilst the cross linked chitosan beads showed its high adsorption on $Pd^{2+}$ at pH 1.1. On the other hand, the cross linked chitosan beads showed its superiority in selective adsorption on $Au^{2+}$, $Cu^{2+}$, and $Hg^{2+}$ions to the MTB-chitosan at pH 4.5 of the test solution. Thus metal selectivities were given to chitosan beads through chemical modifications.

Keywords

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