A study of Ozone Oxidation of Methylene Blue

Methylene Blue의 오존(O3) 산화반응에 관한 연구

  • Lee, Cheal-Gyu (Department of Environmental Engineering, Chongju University) ;
  • Kim, Moon-Chan (Department of Environmental Engineering, Chongju University)
  • 이철규 (청주대학교 이공대학 환경학부) ;
  • 김문찬 (청주대학교 이공대학 환경학부)
  • Received : 2004.12.15
  • Accepted : 2005.04.11
  • Published : 2005.06.10


In this study treatment efficiencies of methylene blue were evaluated in term of BOD, COD, TOC, absorbance and initial decolorization rates. Ozonation of the dye in distilled water was performed in a laboratory scale cylindrical batch reactor. The decolorization process of methylene blue was carried out by bubbling ozone at the bottom of a bubble column reactor containing the dye solution. Decolorization, determined by measuring the light absorbance at the maximum wavelength in the (${\lambda}_{max}$, 660 nm), was almost complete after 40 min with an ozone concentration of $50{\pm}10mg/L$. The $TOC/TOC_0$ ratio after ozonation was about 83.8%, the COD was diminished to 44.0% of the initial value. The $BOD_5/COD$ ratio was increased from 64.2% to about 90.8%, indicating an enhancement of biodegradable compounds in the ozonated solutions. The pseudo first-order rate constants of the ozonation was $3.30{\times}10^{-2}min^{-1}$ and the activation energy was $3.01kcal{\cdot}mol^{-1}$ at $30^{\circ}C$.


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