The adsorption behavior of Eosin Y on activated carbon (AC) in batch system was investigated. The adsorption isotherm could be well fitted by the Langmuir adsorption equation. The kinetics of adsorption followed the pseudo-second-order model. The temperature variation was used to evaluate the values of free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°). The positive value of enthalpy change ΔH° for the process confirms the endothermic nature of the process and more favourable at higher temperature, the positive entropy of adsorption ΔS° reflects the affinity of the AC material toward Eosin Y and the negative free energy values ΔG° indicate that the adsorption process is spontaneous. With the increase of the amount of AC, removal efficiency of Eosin Y was increased, but adsorption capacity was decreased. And adsorption capacity was increased with the decrease of particle size. With the increase of the amount of AC, removal efficiency of Eosin Y was increased, but adsorption capacity was decreased. And adsorption capacity was increased with the decrease of particle size.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 실험 재료
  2.2. 실험방법
 3. 결과 및 고찰
  3.1. 흡착 시간에 따른 영향
  3.2. 흡착 등온식
  3.3. 흡착속도모델
  3.4. 흡착 메커니즘
  3.5. 흡착반응의 열역학적 해석
  3.6. pH변화에 따른 영향
  3.7. 입자크기의 영향
  3.8. 흡착제 양의 영향
 4. 결 론
 참 고 문 헌

• 이민규(부경대학교 화학공학과) | Min-Gyu Lee (Department of Chemical Engineering., Pukyong National University)
• 감상규(제주대학교 환경공학과) | Sang-Kyu Kam (Department of Environmental Engineering, Jeju National University)
• 서근학(부경대학교 화학공학과) | Keun-Hak Suh (Department of Chemical Engineering., Pukyong National University) Corresponding author