Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Formation of Mixed Oxidants and Inactivation of E. coil by the Electrochemical Process using a Grid Shape Pt/Ti Electrode

Pt/Ti 격자형 평판 전극을 이용한 혼합 산화제 생성 및 E. coli 불활성화

  • Jung, Yeon Jung (Department of Environmental Engineering, YIEST Yonsei University) ;
  • Oh, Byung Soo (Department of Environmental Engineering, YIEST Yonsei University) ;
  • Park, Sang Yeon (Department of Environmental Engineering, YIEST Yonsei University) ;
  • Baek, ko Woon (Department of Environmental Engineering, YIEST Yonsei University) ;
  • Kang, Joon-Wun (Department of Environmental Engineering, YIEST Yonsei University)
  • Received : 2006.03.06
  • Accepted : 2006.07.24
  • Published : 2006.09.30
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Abstract

The aim of this study was to investigate characteristics of formation of mixed oxidants and some aspects of the performance of electrochemical process as an alternative disinfection strategy for water purification. The study of electrochemical process has shown free chlorine to be produced, but smaller amounts of stronger oxidants, such as ozone, hydrogen peroxide and OH radicals, were also generated. The formation of ozone and hydrogen peroxide increased with increasing electric conductivity, but was limited at conductivities greater than 0.6 mS/cm. Also, formation of OH radical was enhanced as electric conductivity was increased to 0.9 mS/cm and The stead-state concentrations of OH radical were calculated at $1.1{\sim}6.4{\times}10^{-14}M$. Using E. coti, inactivation kinetic studies were performed. With the exception of free chlorine, the role of mixed oxidants, especially OH radical, was investigated for enhancement of the inactivation rate.

Keywords

Acknowledgement

Supported by : 한국과학재단

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