Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Evaluation of Bromate Formation Pathway by Ozonation in Domestic Raw Waters

국내 수계 원수에서 오존공정에 의한 브로메이트 생성 경로 평가

  • 이경혁 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 임재림 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 박상연 (연세대학교 환경공학과) ;
  • 김성수 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 강준원 (연세대학교 환경공학과)
  • Received : 2006.09.05
  • Accepted : 2006.10.25
  • Published : 2006.12.15
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Abstract

In order to evaluate the optimum operation condition of ozonation to minimize bromate formation, based on the NOM characteristics of raw waters, the pathway of bromate formation by ozonation in domestic raw waters was investigated. Considering the bromate formation reactions, the fractions of bromate formation from bromide by OH radical and molecular ozone were calculated with measured values of ozone decay rate ($k_c$) and Rct. The results showed that molecular ozone is more important role in the formation of bromate in domestic raw waters than OH radical. The ratio of bromide oxidation reaction by molecular ozone ranged 73~88%. Fractions of $HOBr/OBr^-$ reaction with both molecular ozone and OH radical were also determined. OH radical reaction with $HOBr/OBr^-$ was dominant. The differential equations based on the stoichiometry of bromate formation were established to predict the formation rate of bromate by ozonation. The results shows good correlation with experimental results.

Keywords

References

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