Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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A study on lead removal in aqueous solution using autoclaved chitosan

고온.고압 처리한 키토산을 이용한 수중의 납 제거에 관한 연구

  • 김동석 (대구가톨릭대학교 환경정보학부 환경과학전공) ;
  • 이승원 (대구가톨릭대학교 환경정보학부 환경과학전공) ;
  • 우형택 (대구가톨릭대학교 환경정보학부 환경과학전공)
  • Published : 2003.12.01
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Abstract

In order to know the effect of atuoclaving on the heavy metal removal using chitosan, lead removal capacities and removal rates by various chitosans in aqueous solution were compared according to the various autoclaving time. The lead removal efficiencies and removal rates by the autoclaved chitosan were found to be on the order of 15 min(98％) ＞ 10 min(95％) ＞ 30 min(83％) ＞ 5 min(53％) ＞ 60 min(47％) ＞ 0 min(22％) chitosan. The molecular weight of chitosan was decreased by the increase of autoclaving time. Therefore, the heavy metal removal capacity was not well correlated to the molecular weight. Langmuir isotherm was well fitted to experimental results of equilibrium adsorption on chitosan. In order to examine the process of lead removal by the autoclaved chitosan, TEMs, SEMs and FT-IR analyses were used. The surface of autoclaved chitosan was much more porous and the lead removal was mainly occurred on the surface of chitosan. The structure of autoclaved chitosan was same as that of controlled chitosan.

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References

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