Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Characteristics of phenol degradation by using underwater dielectric barrier discharge plasma

수중 유전체 장벽 방전 플라즈마를 이용한 페놀의 분해 특성

  • Shin, Gwanwoo (Department of Environmental engineering, Chungbuk National University) ;
  • Choi, Seungkyu (Department of Environmental engineering, Chungbuk National University) ;
  • Kim, Jinsu (Department of Environmental engineering, Chungbuk National University) ;
  • Zhu, Qian (Department of Environmental engineering, Chungbuk National University) ;
  • Weon, kyoungja (Environmental Analysis Section, Chungcheongbuk-do Research Institute of Health & Environment) ;
  • Lee, Sangill (Department of Environmental engineering, Chungbuk National University)
  • 신관우 (충북대학교 환경공학과) ;
  • 최승규 (충북대학교 환경공학과) ;
  • 김진수 (충북대학교 환경공학과) ;
  • 주천 (충북대학교 환경공학과) ;
  • 원경자 (충청북도보건환경연구원 환경조사과) ;
  • 이상일 (충북대학교 환경공학과)
  • Received : 2019.06.21
  • Accepted : 2019.07.31
  • Published : 2019.08.15
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Abstract

This objective of this study was to investigate the degradation characteristics of phenol, a refractory substance, by using a submerged dielectric barrier discharge (DBD) plasma reactor. To indirectly determine the concentration of active species produced in the DBD plasma, the dissolved ozone was measured. To investigate the phenol degradation characteristics, the phenol and chemical oxygen demand (COD) concentrations were evaluated based on pH and the discharge power. The dissolved ozone was measured based on the air flow rate and power discharged. The highest dissolved ozone concentration was recorded when the injected air flow rate was 5 L/min. At a discharge power of 40W as compared to 70W, the dissolved ozone was approximately 2.7 - 6.5 times higher. In regards to phenol degradation, the final degradation rate was highest at about 74.06%, when the initial pH was 10. At a discharged power of 40W, the rate of phenol decomposition was observed to be approximately 1.25 times higher compared to when the discharged power was 70W. It was established that the phenol degradation reaction was a primary reaction, and when the discharge power was 40W as opposed to 70W, the reaction rate constant(k) was approximately 1.72 times higher.

Keywords

References

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