Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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Study on Adsorption and Recovery of Heavy Metal Ions, Cd(II) and Pb(II), by Chitin

키틴에 의한 중금속 Cd(II), Pb(II)이온의 흡착 및 회수에 관한 연구

  • Kim, Eun-Kyung (Department of Chemical Engineering, Kongju National University) ;
  • Cho, Young-Koo (Department of Chemical Engineering, Samchok National University) ;
  • Kwon, Young-Du (Department of Environmental Engineering, Donghae University) ;
  • Park, Mi-A (Department of Environmental & Applied Chemical Engineering, Kangnung National University) ;
  • Kim, Han-Soo (Department of Environmental & Applied Chemical Engineering, Kangnung National University) ;
  • Park, Kwang-Ha (Department of Environmental & Applied Chemical Engineering, Kangnung National University)
  • 김은경 (공주대학교 화학공학과) ;
  • 조영구 (삼척대학교 화학공학과) ;
  • 권영두 (동해대학교 환경공학과) ;
  • 박미아 (강릉대학교 환경응용화학공학과) ;
  • 김한수 (강릉대학교 환경응용화학공학과) ;
  • 박광하 (강릉대학교 환경응용화학공학과)
  • Received : 2002.01.16
  • Published : 2002.04.25
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Abstract

The adsorption characteristics of Cd(II) and Pb(II) ions has been studied by using chitin as an adsorbent. The pure chitin was obtained from the extraction of red-crab shell dumped by fish factory. Adsorption kinetics of Cd(II) and Pb(II) ions on the chitin reached at the maximum adsorption within two minutes. Adsorbed amounts of heavy metals were pH 7.0>10.5>3.5 in the following order. Adsorption ratio by chitin was 21${\sim}$99% for Cd(II) ion and 24${\sim}$95% for Pb(II) ion. Recovery ratio of Cd(II) ion on the chitin was 22${\sim}$53%, and that of Pb(II) ion was 22${\sim}$73%. The adsorption behavior of these heavy metals was explained well by Freundlich adsorption isotherm.

수산가공 폐기물로 버려지는 게 껍질로부터 chitin을 추출하여 중금속 흡착제로 이용하였으며, 이 흡착제에 대해 Cd(II) 및 Pb(II) 이온의 흡착특성을 연구하였다. Chitin에 대한 Cd(II) 및 Pb(II) 이온의 흡착속도는 반응시간 2분경에 최대흡착량에 도달하였으며, 중금속 흡착에 미치는 pH의 영향은 두 이온 모두 pH 7.0>10.5>3.5순임을 알 수 있었다. Chitin에 대한 흡착률은 Cd(II)이온이 21${\sim}$99%이며, Pb(II)이온이 24${\sim}$95%이다. Cd(II)이온의 회수율은 22${\sim}$53%이고, Pb(II)이온의 회수율은 22${\sim}$73%로 나타났다. 이들 중금속 이온의 흡착양상은 Freundlich 흡착등온식에 비교적 잘 적용되었다.

Keywords

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