The adsorption behavior of nitrate nitrogen was investigated from aqueous solution using char prepared from oak chip. The removal rate of nitrate nitrogen was found to be dependent on temperature and it is increased as the temperature increase. Adsorption equilibrium data of nitrate nitrogen on oak char. reasonably fitted Langmuir and Freundlich isotherm models. The adsorption energy obtained from D-R model was 12.5 kJ/mole at 20℃ indicating an ion exchange process as primary adsorption mechanism. Thermodynamic parameters such as △Go,, △Ho, and △So were -23.76 kJ/mole, 26.1 kJ/mole and 89.7 J/K·mole at 20℃, respectively, indicated that the nature of nitrate nitrogen adsorption is spontaneous and endothermic.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 산 처리 목탄 시료의 제조
  2.2. 흡착실험 및 분석방법
 3. 결과 및 고찰
  3.1. 흡착온도에 따른 NO3-N의 흡착
  3.2. 흡착 등온
  3.3. 흡착 속도
  3.4. 흡착 열역학
 4. 결 론
 참 고 문 헌

• 김정애(조선대학교 환경공학과) | Jeong-Ae Kim (Department of Environmental Engineering, Chosun University)
• 정경훈(조선대학교 환경공학과 BK21 바이오 가스기반 수소생산 사업팀) | Kyung-Hoon Cheong (Department of Environmental Engineering and BK21 Team for Biohydrogen Production, Chosun University) Corresponding Author
• 최형일(조선대학교 환경공학과) | Hyung-Il Choi (Department of Environmental Engineering, Chosun University)
• 문경도(조선대학교 환경공학과 BK21 바이오 가스기반 수소생산 사업팀) | Kyung-Do Moon (Department of Environmental Engineering and BK21 Team for Biohydrogen Production, Chosun University)
• 이호령(조선대학교 환경공학과) | Ho-Ryeong Lee (Department of Environmental Engineering, Chosun University)