화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Chemical Engineering Research, Vol.56, No.1, 96-102, February, 2018
DOI10.9713/kcer.2018.56.1.96  Export Citation
염기성 염료 Basic Blue 3에 대한 야자계 입상활성탄의 흡착 특성
Adsorption Characteristics of Coconut Shell-based Granular Activated Carbon on a Basic Dye Basic Blue 3
박하늘1, 최한아2, 원성욱1, 2, †
  • 1경상대학교 해양시스템공학과, 53064 경남 통영시 천대국치길 38
  • 2경상대학교 해양환경공학과, 해양산업연구소, 53064 경남 통영시 천대국치길 38
Ha Neul Park1, Han Ah Choi2, and Sung Wook Won1, 2, †
  • 1Department of Ocean System Engineering, Gyeongsang National University, 38 Cheondaegukchi-gil, Tongyeong-si, Gyeongsangnam-do, 53064, Korea
  • 2Department of Marine Environmental Engineering and Institute of Marine Industry, Gyeongsang National University, 38 Cheondaegukchi-gil, Tongyeong-si, Gyeongsangnam-do, 53064, Korea
E-mail:
초록
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 제거되 었다. 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(ΔG)는 온도 증가에 따라 -7.37, -8.19, -10.40 kJ/mol으로 변화하였고, 엔탈피 변화(ΔH) 및 엔트로피 변화(ΔS)는 34.47 kJ/mol과 0.15 J/mol K로 계산되었다. 따라서 야자계 입상활성탄에 의한 BB3 흡착은 자발적이고 흡열적이었다.
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 (qmax) predicted by the Langmuir model were 34.45, 46.63 and 53.10 mg/g at 298, 308 and 318 K, respectively. The qmax value increased as the temperature increased. Also, the Gibbs free energy (ΔG) was changed to -7.37, -8.19 and -10.40 kJ/mol with increasing temperature. The enthalpy change (ΔH) and the entropy change (ΔS) were 34.47 kJ/mol and 0.15 J/mol K, respectively. Therefore adsorption of BB3 by CS-GAC was spontaneous and endothermic.
Keywords:Adsorption;Basic Blue 3;Activated carbon;Isotherm;Thermodynamic parameter
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