Membrane and Water Treatment

  • 제10권3호
  • /
  • Pages.231-237
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  • 2019
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  • 2005-8624(pISSN)
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  • 2092-7037(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Inactivation of Escherichia coli and MS2 coliphage by Cu(II)-activated peroxomonosulfate in natural water

  • Kim, Hyung-Eun (Center for Water Resource Cycle Research, KIST School, Korea Institute of Science and Technology (KIST)) ;
  • Lee, Hye-Jin (Department of Chemical Engineering, McMaster University) ;
  • Kim, Min Sik (School of Chemical and Biological Engineering, Institute of Engineering Research, Seoul National University) ;
  • Choi, Joon-Young (Hyorim Industries Inc.) ;
  • Lee, Changha (School of Chemical and Biological Engineering, Institute of Engineering Research, Seoul National University)
  • Received : 2018.10.01
  • Accepted : 2019.04.01
  • Published : 2019.05.25
⟨ 이전 논문 다음 논문 ⟩

Abstract

Peroxymonosulfate (PMS) in combination with Cu(II) was examined to inactivate E. coli and MS2 coliphage in natural water. The combined system (i.e., the Cu(II)/PMS system) caused a synergistic inactivation of E. coli and MS2, in contrast with either Cu(II) or PMS alone. Increasing the concentration of PMS enhanced the inactivation of E. coli and MS2, but after a certain point, it decreased the efficacy of the microbial inactivation. In the Cu(II)/PMS system, adding reactive oxidant scavengers marginally affected the E. coli inactivation, but the inhibitory effects of copper-chelating agents were significant. Fluorescent assays indicated that the Cu(II)/PMS system greatly increased the level of reactive oxidants inside the E. coli cells. The sequential addition of Cu(II) and PMS inactivated more E. coli than did adding the two simultaneously; in particular, the inactivation efficacy was much higher when Cu(II) was added first. The observations from the study collectively showed that the microbial inactivation by the Cu(II)/PMS system could be attributed to the toxicity of Cu(I) as well as the intracellular oxidative stress induced by Cu(III) or radical species.

Keywords

Acknowledgement

Supported by : Korea Environment Industry & Technology Institute (KEITI)

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