The efficiency of coal-based activated carbon in removing methylene blue (MB) and phenol from aqueous solution was investigated in batch experiments. The batch adsorption kinetics were described by applying pseudo-first-order, pseudo-second-order, and first order reversible reaction. The results showed that the adsorption of MB and phenol occurs complexed process including external mass transfer and intraparticle diffusion. The maximum adsorption capacity obtained from Langmuir isotherm was 461.0 mg/g for MB and 194.6 mg/g for phenol, respectively. The values of activation parameters such as free energy (△G˚), enthalpy (△H˚), and entropy (△S˚) were also determined as -19.0∼-14.9 kJ/mol, 25.4 kJ/mol, and 135.2 J/mol K for MB and 51.8∼54.1 kJ/mol, -29.0 kJ/mol, and -76.4 kJ/mol K for phenol, respectively. The MB adsorption was found to be endothermic and spontaneous process. However, the CV adsorption was found to be exothermic and non-spontaneous process.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 실험 재료
  2.2. 실험 방법
 3. 결과 및 고찰
  3.1. 농도에 따른 영향
  3.2. 흡착속도
  3.3. 흡착 메커니즘
  3.4. 흡착 등온식
  3.5. 열역학적 해석
 4. 결 론
 참 고 문 헌

• 이송우(부경대학교 화학공학과) | Song-Woo Lee (Department of Chemical Engineering, Pukyong National University)
• 이민규(부경대학교 화학공학과) | Min-Gyu Lee (Department of Chemical Engineering, Pukyong National University) Corresponding author
• 감상규(제주대학교 환경공학과) | Sang-Kyu Kam (Department of Environmental Engineering, Jeju National University)