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염기성 염료 Basic Blue 3에 대한 야자계 입상활성탄의 흡착 특성
박하늘,최한아,원성욱,Park, Ha Neul,Choi, Han Ah,Won, Sung Wook 한국화학공학회 2018 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.56 No.1
In this study, adsorption characteristics of coconut shell-based granular activated carbon (CS-GAC) on Basic Blue 3 (BB3) were evaluated. As the dosage of CS-GAC increased, the removal efficiency of BB3 tended to increase and the initial dye concentration of 50 mg/L was completely removed at 0.2 g dosage. Adsorption equilibrium achieved within 270 and 420 min at the initial concentrations of 25 and 50 mg/L, respectively, and the experimental data were represented by the pseudo-second-order model. The maximum uptakes ($q_{max}$) predicted by the Langmuir model were 34.45, 46.63 and 53.10 mg/g at 298, 308 and 318 K, respectively. The $q_{max}$ value increased as the temperature increased. Also, the Gibbs free energy (${\Delta}G$) was changed to -7.37, -8.19 and -10.40 kJ/mol with increasing temperature. The enthalpy change (${\Delta}H$) and the entropy change (${\Delta}S$) were 34.47 kJ/mol and 0.15 J/mol K, respectively. Therefore adsorption of BB3 by CS-GAC was spontaneous and endothermic. 본 연구에서는 Basic Blue 3 (BB3)에 대한 야자계 입상활성탄의 흡착특성을 평가하였다. 입상활성탄의 투여량이 증가함에 따라 BB3의 제거율은 증가하는 경향을 보였고, 0.2 g 투여량에서 초기농도 50 mg/L의 BB3가 완전히 제거되었다. 흡착평형은 초기농도 25 mg/L와 50 mg/L에서 각각 270분과 420분이 소요되었으며, 실험데이터는 유사 2차 속도식으로 잘 묘사되었다. Langmuir 식에서 예측된 최대흡착량은 298, 308, 318 K에서 34.45, 46.63, 53.10 mg/g으로 온도가 증가할수록 증가하였다. 또한, Gibbs 자유에너지 변화(${\Delta}G$)는 온도 증가에 따라 -7.37, -8.19, -10.40 kJ/mol으로 변화하였고, 엔탈피 변화(${\Delta}H$) 및 엔트로피 변화(${\Delta}S$)는 34.47 kJ/mol과 0.15 J/mol K로 계산되었다. 따라서 야자계 입상활성탄에 의한 BB3 흡착은 자발적이고 흡열적이었다.
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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
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석탄계 입상활성탄을 이용한 수용액으로부터 염기성 염료의 제거
최한아(Han Ah Choi),박하늘(Ha Neul Park),문혜원(Hye Woon Moon),김은빈(Eun Bin Kim),장연우(Yeon Woo Jang),원성욱(Sung Wook Won) 한국청정기술학회 2017 청정기술 Vol.23 No.2
본 연구에서는 석탄계 입상활성탄을 이용하여 수용액으로부터 염기성 염료 Basic Blue 3 (BB3)의 흡착에 대해 조사하였다. 모든 실험은 회분공정에서 수행하였고, 활성탄의 투입량, 접촉시간, 초기농도 및 온도와 같은 흡착변수들에 대해 평가하였다. 활성탄의 투입량이 증가할수록 BB3 제거율도 증가하였으며, 활성탄 0.2 g 이상에서 초기농도 50 mg L<SUP>-1</SUP>의 BB3가 100%제거되었다. 또한, 흡착평형에 도달하는 시간은 염료의 초기농도에 의존적이었다. Langmuir 모델에 따르면, 석탄계 입상활성탄의 최대흡착량은 25, 35, 45 ℃에서 66.45, 84.97, 87.19 mg g<SUP>-1</SUP>으로 산출되었다. 그리고 Gibbs 자유에너지 변화량, 엔탈피변화량, 엔트로피 변화량과 같은 열역학적 변수들에 대해 평가하였다. This research studied the adsorption of basic dye, Basic Blue 3 (BB3) by using coal-based granular activated carbon (C-GAC) from aqueous solution. All experiments were performed in batch processes, and adsorption parameters such as C-GAC dosage, contact time, initial dye concentration and temperature were evaluated. The removal efficiency of BB3 was increased with increasing the C-GAC dosage and 100% of initial concentration, 50 mg L<SUP>-1</SUP> was removed above 0.2 g of C-GAC. Also, the time to reach equilibrium depended on the initial dye concentration. According to the Langmuir model, the maximum uptakes of C-GAC were calculated to be 66.45, 84.97 and 87.19 mg g<SUP>-1</SUP> at 25, 35 and 45 ℃, respectively. In addition, thermodynamic parameters such as Gibbs free energy change, enthalpy change and entropy change were investigated.
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