Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Biosorption and Desorption of Pb by using Sargassum horneri

괭생이모자반, Sargassum horneri를 이용한 Pb 흡착 및 탈착

  • SUH Kuen-Hack (Dept. of Chemical Engineering, Pukyong National University) ;
  • AHN Kab-Hwan (Dept. of Environmental Engineering, Jisan College) ;
  • KIM Byong-Jin (Dept. of Chemical Engineering, Pukyong National University) ;
  • CHO Jin-Koo (Dept. of Chemical Engineering, Pukyong National University) ;
  • JIN Hyung-Joo (Dept. of Biotechnology, Pukyong National University) ;
  • HONH Yong-Ki (Dept. of Biotechnology, Pukyong National University)
  • Published : 1999.05.01
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Abstract

Biosorption of Pb to Sargassum horneri was evaluated. An adsorption equilibrium was reached in about 15 min. for Pb and Pb uptake was 185.5 mg Pb/g biomass. When Ca and Mg concentration increases in Pb solution, Pb was selectively adsorbed. The Pb adsorbed by S. horneri could be recovered by desorption process, and the desorption efficiency of Pb by 0.1 M HCl, 0.1 M $HNO_3$, and 0.1 M EDTA was above $95\%$, whereas the elution by 0.1 M NaOH was less efficient in the desorption of Pb. S. horneri was reused 6 cycle repeatedly after adsorption/desorption and the sum of uptake was 636.6 mg Pb/g biomass.

우리나라 인근 해역에서 가장 쉽게 채취할 수 있는 해조류중의 하나인 S. horneri을 이용한 Pb 의 생체흡착 실험을 수행하였다. 흡착 평형에는 15분 안에 도달하였으며, 평형흡착량은 185.5mg Pb/g biomass 이었다. pH가 감소할수록 Pb는 흡착량이 현저히 감소하였다. 또한 Pb 흡착시에 Ca 및 Mg가 500mg/L 존재하여도 Ca 및 Mg 등의 경금속은 전혀 흡착되지 않고 Pb만을 선택적으로 제거하는 것이 가능하였으나, 고농도로 존재하는 경금속들이 inhibotor 작용을 하여 Pb의 흡착량은 다소 감소하였다. Pb흡착 및 탈착 과정을 6회 반복한 결과, HCl 및 $HNO_3$ 이용한 경우에 흡착된 Pb의 회수 및 S. horneri의 재생에 있어 매우 효과적인 것으로 나타났다.

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