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Dye biosorption from an aqueous solution by Corynebacterium glutamicum biomass
원성욱,최순범,윤영상 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.1
본 연구는 Corynebacterium glutamicum biomass를 이용하여 Reactive Orange 16, Reactive Blue 4, Reactive Yellow 2, Reactive Red 4, Methylene Blue, Disperse Orange 11에 대한 흡착실험을 하였다. 반응성 염료는 pH 1∼3에서 최적 pH를 갖으며 500 mg/l이하의 농도에서는 90∼95%의 흡착률을 보였다. 그러나 Methylene Blue는 pH 변화에 상관없이 거의 흡착이 이루어지지 않았으며 Disperse Orange 11은 단지 Methylene Blue보다 조금 더 많은 양이 흡착되었다. 이는 C. glutamicum biomass의 표면이 양이온을 띠고 있고 반응성 염료는 음이온을 띠어 서로 잘 반응하여 흡착이 쉽게 이루어 지는것으로 보인다. Methylene Blue는 양이온을 띠고 Disperse Orange 11은 이온을 띠지 않아 biomass와 거의 반응하지 않는 것으로 생각되어 진다. 그리고 반응성 염료는 pH 6∼8에서 거의 95%가 탈착되었다. 결론적으로 C. glutamicum biomass는 반응성 염료에 대해 높은 흡/탈착률을 보이므로 반응성 염료와 같이 음이온을 띠는 염료를 제거하는 흡착제로써 잠재적 가치가 매우 클 것으로 기대된다.
원성욱,한민희,최순범,전유철,조철웅,정봉우,윤영상 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.2
The amino acid fermentation process residue, Corynebacterium glutamicum biomass, was used as a biosorbent to remove Reactive Blue 4. This study was performed in batch and fixed-bed column systems. The dye was effectively removed at pH 1 - 3 in batch tests. The initial slope of isotherm curve was steep, indicating that the biomass affinity for the dye molecules is high. The Langmuir isotherm was used to describe the dye binding capacity of the biomass. The performance of fixed-bed column, containing particles of C. glutamicum biomass, was evaluated using 300 mg/L dye solutions at flow rates of 0.31 and 0.71 ml/min. The breakthrough volume was increased with decreased flow rate. Therefore, the fermentation byproduct was considered to be recycled as a dye sorbent.
윤영상,Juan Mao,민지호,원성욱 한국화학공학회 2008 Korean Journal of Chemical Engineering Vol.25 No.5
The waste biomass generated from mono sodium glutamate fermentation process, Corynebacterium glutamicum, was evaluated as a biosorbent for the removal of Basic Blue 3 (BB 3), as a model cationic dye, from aqueous solution. A series of batch experiments to study pH edge, precipitation of dye, isotherms and kinetics were undertaken. The solution pH was found to be an important factor in biosorption of BB 3. With increasing the pH, the uptake of BB 3 increased, except at a pH below 2. At pH values below 2, the precipitation of BB 3 occurred rather than biosorption, which resulted in overestimation of the sorption performance. The sorption process could reach quickly to equilibrium after 1 min. The Langmuir and Freundlich models were used to fit the experimental data at different pH conditions. Between them, the Langmuir model described the experimental data very well with high correlation coefficients. Furthermore, C. glutamicum was easily eluted by shifting the solution pH, making repeated sorption/desorption cycle (up to 4 times) possible without significant performance decrease