Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Effects of Nitrate Ions on Advanced Oxidation of UV/H2O2 for 2,4-Dichlomphenol Degradation

UV/H2O2를 이용한 2,4-DCP의 산화에 NO3- 이온이 미치는 영향

  • Park, Jae Han (School of Civil and Environmental Engineering, Yonsei University) ;
  • Lee, Ji Yong (School of Civil and Environmental Engineering, Yonsei University) ;
  • Ahn, Yoon Hee (School of Civil and Environmental Engineering, Yonsei University) ;
  • Moon, Tae Hoon (School of Civil and Environmental Engineering, Yonsei University) ;
  • Yim, Sung Kyun (Construction&Environmental Research Team, Kolon E&C Co) ;
  • Ko, Kwang Baik (School of Civil and Environmental Engineering, Yonsei University)
  • 박재한 (연세대학교 공과대학 토목환경공학과 환경공학연구실) ;
  • 이지영 (연세대학교 공과대학 토목환경공학과 환경공학연구실) ;
  • 안윤희 (연세대학교 공과대학 토목환경공학과 환경공학연구실) ;
  • 문태훈 (연세대학교 공과대학 토목환경공학과 환경공학연구실) ;
  • 임성균 ((주) 코오롱건설기술연구소) ;
  • 고광백 (연세대학교 공과대학 토목환경공학과 환경공학연구실)
  • Received : 2006.11.29
  • Accepted : 2007.03.26
  • Published : 2007.05.30
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Abstract

The Advanced Oxidation Process (AOP) is being increasingly used to oxidize complex organic constituents in treated effluents from domestic wastewater treatment plants. Generally, ${NO_3}^--N$ concentrations ranges between 5 and 8 mg/L for biologically well-treated effluents. However, nitrate ions, ${NO_3}^-$, affects on oxidation as not only a well-known strong absorber of UV light below 250 nm of wavelength but also as an OH radical scavenger. The objective of this study was to evaluate the AOP systems for degradation of 2,4-DCP, and to delineate the effect of nitrate ions on UV oxidation of 2,4-DCP by conducting a bench-scale operation at various reaction times and initial concentrations of $H_2O_2$. The experimental results indicated that 2,4-DCP could be completely oxidized by $UV/H_2O_2$ process with an initial $H_2O_2$ concentration of 20 mg/L at a retention time of 1.0 min or longer. Nitrate ions did not show any adverse effect on 2,4-DCP oxidation at this high $H_2O_2$ concentration, and the practical initial $H_2O_2$ concentration and reaction time for the 80% oxidation turned out to be 5 mg/L and 1.0 min, respectively.

Keywords

Acknowledgement

Supported by : 환경부

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