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Korean Journal of Chemical Engineering

, Volume 36, Issue 11, pp 1785–1790 | Cite as

Inactivation of Escherichia coli and MS2 coliphage via singlet oxygen generated by homogeneous photosensitization

  • Taewan Kim
  • Hyung-Eun Kim
  • Jiyoon Cho
  • Hak-Hyeon Kim
  • Jiwon Seo
  • Junghun Lee
  • Joon-Young Choi
  • Changha LeeEmail author
Rapid Communication
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Abstract

The inactivation kinetics of E. coli and MS2 coliphage by singlet oxygen (1O2) were investigated in a homogeneous photosensitization system using Rose Bengal (RB) and visible light illumination (the Vis/RB system). The inactivation of E. coli and MS2 in the Vis/RB system was monitored over time with variations of several parameters such as pH, light intensity, concentration of RB, and the presence of dissolved oxygen. In addition, the concentration of 1O2 generated by the Vis/RB system was quantified using furfuryl alcohol under each microbial inactivation conditions. Based on the obtained results, the degree of microbial inactivation was quantitatively correlated with 1O2 exposure using the (delayed) Chick-Watson model. The Ct (concentration-time product) values of 1O2 required for 2 log microbial inactivation were found to be 1.3×10−4 mg·min/L for E. coli and 1.9×10−5 mg·min/L for MS2, respectively. The inactivation of E. coli exhibited an initial lag phase until 0.5×10−4 mg·min/L of Ct.

Keywords

E. coli MS2 Coliphage Singlet Oxygen Disinfection Inactivation Kinetics 

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Notes

Acknowledgements

This work was supported by the Korea Ministry of Environment as an “Advanced Industrial Technology Development Project” (2017000140005) and as “Industrial Facilities & Infrastructure Research Program” (88107), and by NRF-2017-Global Ph.D. Fellowship Program.

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Copyright information

© The Korean Institute of Chemical Engineers 2019

Authors and Affiliations

  • Taewan Kim
    • 1
  • Hyung-Eun Kim
    • 2
  • Jiyoon Cho
    • 3
  • Hak-Hyeon Kim
    • 3
  • Jiwon Seo
    • 3
  • Junghun Lee
    • 3
  • Joon-Young Choi
    • 4
  • Changha Lee
    • 3
    Email author
  1. 1.School of Urban and Environmental EngineeringUlsan National Institute of Science and Technology (UNIST)UlsanKorea
  2. 2.Center for Water Resource Cycle Research, KIST SchoolKorea Institute of Science and Technology (KIST)SeoulKorea
  3. 3.School of Chemical and Biological Engineering, and Institute of Chemical Process (ICP)Seoul National UniversitySeoulKorea
  4. 4.Hyorim Industries Inc.Gyeonggi-doKorea

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