Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Utilization of Corynebacterium glutamicum Biomass as a Regenerable Biosorbent for Removal of Reactive Dyes from Aqueous Solution

반응성 염료 제거를 위한 재생 가능한 흡착제로서 Corynebacterium glutamicum 바이오매스의 이용

  • Won, Sung -Wook (Division of Environmental and Chemical Engineering, Chonbuk National University) ;
  • Choi, Sun Beom (Division of Environmental and Chemical Engineering, Chonbuk National University) ;
  • Han, Min Hee (Division of Environmental and Chemical Engineering, Chonbuk National University) ;
  • Yun, Yeoung-Sang (Division of Environmental and Chemical Engineering, Chonbuk National University)
  • 원성욱 (전북대학교 환경화학공학부 및 공업기술연구센타) ;
  • 최순범 (전북대학교 환경화학공학부 및 공업기술연구센타) ;
  • 한민희 (전북대학교 환경화학공학부 및 공업기술연구센타) ;
  • 윤영상 (전북대학교 환경화학공학부 및 공업기술연구센타)
  • Received : 2004.12.30
  • Accepted : 2005.05.27
  • Published : 2005.08.31
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Abstract

Biosorption is considered to be a promising alternative to replace or supplement the present methods for the treatment of dye-containing wastewater. In this study, the protonated biomass of Corynebacterium glutamicum was evaluated for its potential to remove two types of reactive dyes (Reactive Red 4, Reactive Blue 4) from aqueous solution. The uptakes of dyes were enhanced with decrease in the solution pH, which was likely because the biomass functional groups increased at acidic pH and the positively charged sites could bind the negatively charged sulfonate group ($dye-SO_3^-$) of dye molecules. An equilibrium state was practically achieved in 10 hr. The Langmuir sorption model was used for the mathematical description of the sorption equilibrium. The maximum sorption capacities of C. glutamicum biomass for Reactive Red 4 and Reactive Blue 4 were estimated to 112.36 mg/g and 263.16 mg/g at pH 1, and 71.94 mg/g and 155.88 mg/g at pH 3.

생체흡착은 염색폐수로부터 염료 제거를 위한 현재의 처리방법을 교체 또는 보충할 수 있는 유력한 대안이 되고 있다. 본 연구에서는 수용액으로부터 반응성 염료(Reactive Red 4, Reactive Blue 4)를 제거할 수 있는 생체흡착제로서 아미노산 발효공정에서 발생되고 있는 폐기물인 Corynebacterium glutamicum 바이오매스의 활용 가능성에 대해 평가하였다. 염료들의 흡착량은 용액 pH가 감소함에 따라 증가하였는데 이는 산성 pH에서 바이오매스의 표면 작용기는 (+)극성을 띠게 되어 반응성 염료의 (-)극성을 갖는 술폰기(sulfonate group)와 결합하였기 때문인 것으로 사료된다. 접촉시간에 따른 생체흡착속도 실험을 통해 평형에 도달하는 시간은 약 10시간으로 평가되었다. 흡착평형의 수학적인 묘사를 위해 Langmuir 흡착 모델을 적용한 결과, Reactive Red 4, Reactive Blue 4의 최대흡착량은 pH 1에서 112.4 mg/g 및 263.16 mg/g이었으며, pH 3에서는 각각 71.94 mg/g 및 155.88 mg/g이었다.

Keywords

Acknowledgement

Supported by : 한국과학재단

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