Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Degradation characteristics and upgrading biodegradability of phenol by dielectric barrier discharge plasma using catalyst

촉매 물질을 적용한 유전체 장벽 방전 플라즈마의 페놀 분해 특성 및 생분해도 향상

  • 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) ;
  • 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) ;
  • 원경자 (충청북도보건환경연구원 환경조사과) ;
  • 이상일 (충북대학교 환경공학과)
  • Received : 2020.01.22
  • Accepted : 2020.02.14
  • Published : 2020.02.15
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Abstract

This study investigated the degradation characteristics and biodegradability of phenol, refractory organic matters, by injecting MgO and CaO-known to be catalyst materials for the ozonation process-into a Dielectric Barrier Discharge (DBD) plasma. MgO and CaO were injected at 0, 0.5, 1.0, and 2 g/L, and the pH was not adjusted separately to examine the optimal injection amounts of MgO and CaO. When MgO and CaO were injected, the phenol decomposition rate was increased, and the reaction time was found to decrease by 2.1 to 2.6 times. In addition, during CaO injection, intermediate products combined with Ca2+ to cause precipitation, which increased the COD (chemical oxygen demand) removal rate by approximately 2.4 times. The biodegradability of plasma treated water increased with increase in the phenol decomposition rate and increased as the amount of the generated intermediate products increased. The biodegradability was the highest in the plasma reaction with MgO injection as compared to when the DBD plasma pH was adjusted. Thus, it was found that a DBD plasma can degrade non-biodegradable phenols and increase biodegradability.

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References

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