Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Adsorption Characteristics of Nitrate-nitrogen by Carbonaceous Material Prepared from Oak

참나무 탄화물을 이용한 질산성질소의 흡착 특성

  • Kim, Jeong-Ae (Department of Environmental Engineering, Chosun University) ;
  • Cheong, Kyung-Hoon (Department of Environmental Engineering and BK21 Team for Biohydrogen Production, Chosun University) ;
  • Choi, Hyung-Il (Department of Environmental Engineering, Chosun University) ;
  • Moon, Kyung-Do (Department of Environmental Engineering and BK21 Team for Biohydrogen Production, Chosun University) ;
  • Lee, Ho-Ryeong (Department of Environmental Engineering, Chosun University)
  • 김정애 (조선대학교 환경공학과) ;
  • 정경훈 (조선대학교 환경공학과 BK21 바이오 가스기반 수소생산 사업팀) ;
  • 최형일 (조선대학교 환경공학과) ;
  • 문경도 (조선대학교 환경공학과 BK21 바이오 가스기반 수소생산 사업팀) ;
  • 이호령 (조선대학교 환경공학과)
  • Received : 2010.10.14
  • Accepted : 2011.01.07
  • Published : 2011.02.28
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Abstract

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 $20^{\circ}C$ indicating an ion exchange process as primary adsorption mechanism. Thermodynamic parameters such as ${\Delta}G^o$, ${\Delta}H^o$, and ${\Delta}S^o$ were -23.76 kJ/mole, 26.1 kJ/mole and 89.7 J/K mole at $20^{\circ}C$, respectively, indicated that the nature of nitrate nitrogen adsorption is spontaneous and endothermic.

Keywords

References

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