Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Effect of Operating Parameters on Methyl Orange Removal in Catalytic Ozonation

촉매 오존화 공정에서 메틸오렌지 제거에 미치는 운전변수의 영향

  • Lee, Myoung-Eun (Department of Urban System Engineering, Gyeongnam National University of Science and Technology (GNTECH)) ;
  • Kim, Ji-Eun (Department of Environmental Engineering, GNTECH) ;
  • Chung, Jae Woo (Department of Environmental Engineering, GNTECH)
  • 이명은 (경남과학기술대학교 도시시스템공학과) ;
  • 김지은 (경남과학기술대학교 환경공학과) ;
  • 정재우 (경남과학기술대학교 환경공학과)
  • Received : 2017.05.11
  • Accepted : 2017.07.14
  • Published : 2017.07.31
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Abstract

Removal characteristics of methyl orange and their dependence on operating parameters in a catalytic ozonation were investigated through a series of batch experiments. Activated carbon enhanced the self-decomposition of ozone, generating $OH{\cdot}$, thus promoting methyl orange degradation. As the carbon dose increases, the pseudo-first order rate constants of methyl orange degradation increased, resulting in the fast removal of methyl orange. The increase of gaseous ozone concentration enhanced the mass transfer to the aqueous solution, therefore, promoted the methyl orange removal. The methyl orange degradation was not significantly affected by the change of pH in the range of 5~12, and TOC removal was negligibly affected by the variation of pH over 7. The results indicate that the catalytic ozonation can be considered as an effective dye treatment technology.

촉매오존화 공정에 의한 메틸오렌지 제거특성과 그에 미치는 운전변수의 영향에 관한 회분식 실험과 동력학적 연구를 수행하였다. 활성탄은 오존의 자가분해를 촉진시켜 $OH{\cdot}$를 발생시키므로 메틸오렌지 분해속도를 증가시키는 것으로 나타났다. 활성탄의 투입량이 증가함에 따라 메틸오렌지 분해반응의 속도상수가 증가하는 것으로 나타났다. 가스상 오존농도 증가는 수용액으로의 물질전달을 증가시켜 메틸오렌지 분해반응의 속도를 증가시키는 것으로 나타났다. 메틸오렌지 제거반응은 실험된 5~12 범위에서, TOC 제거는 7 이상의 pH에서 큰 영향을 미치지 않는 것으로 나타났다. 이러한 결과는 촉매오존화공정이 효과적인 염료처리 기술로서 고려될 수 있음을 보여준다.

Keywords

Acknowledgement

Supported by : 경남과학기술대학교

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