Pulsed ultra-violet inactivation spectrum of Escherichia coli

Research output: Contribution to journalArticle

142 Citations (Scopus)

Abstract

Inactivation of Escherichia coli is examined using ultra-violet (UV) radiation from a pulsed xenon flashlamp. The light from the discharge has a broadband emission spectrum extending from the UV to the infrared region with a rich UV content. The flashlamp provides high-energy UV output using a small number of short-duration pulses (30 μs). The flashlamp is used with a monochromator to investigate the wavelength sensitivity of E. coli to inactivation by the pulsed UV light. Using 8 nm wide pulses of UV radiation, the most efficient inactivation is found to occur at around 270 nm and no inactivation is observed above 300 nm. A pyroelectric detector allows the energy dose to be determined at each wavelength, and a peak value for E. coli population reduction of 0.43 log per mJ/cm2 is measured at 270 nm. The results are compared with the published data available for continuous UV light sources.
LanguageEnglish
Pages2921-2925
Number of pages4
JournalWater Research
Volume39
Issue number13
DOIs
Publication statusPublished - 2005

Fingerprint

Escherichia coli
ultraviolet radiation
Ultraviolet radiation
wavelength
Wavelength
xenon
Monochromators
Xenon
Dosimetry
energy
Light sources
Infrared radiation
Detectors
Ultraviolet Rays
dose
detector

Keywords

  • UV inactivation
  • escherichia coli
  • e coli
  • disinfection
  • microorganism
  • flashlamp
  • water

Cite this

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title = "Pulsed ultra-violet inactivation spectrum of Escherichia coli",
abstract = "Inactivation of Escherichia coli is examined using ultra-violet (UV) radiation from a pulsed xenon flashlamp. The light from the discharge has a broadband emission spectrum extending from the UV to the infrared region with a rich UV content. The flashlamp provides high-energy UV output using a small number of short-duration pulses (30 μs). The flashlamp is used with a monochromator to investigate the wavelength sensitivity of E. coli to inactivation by the pulsed UV light. Using 8 nm wide pulses of UV radiation, the most efficient inactivation is found to occur at around 270 nm and no inactivation is observed above 300 nm. A pyroelectric detector allows the energy dose to be determined at each wavelength, and a peak value for E. coli population reduction of 0.43 log per mJ/cm2 is measured at 270 nm. The results are compared with the published data available for continuous UV light sources.",
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author = "T. Wang and S.J. MacGregor and J.G. Anderson and G. Woolsey",
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language = "English",
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}

Pulsed ultra-violet inactivation spectrum of Escherichia coli. / Wang, T.; MacGregor, S.J.; Anderson, J.G.; Woolsey, G.

In: Water Research, Vol. 39, No. 13, 2005, p. 2921-2925.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Pulsed ultra-violet inactivation spectrum of Escherichia coli

AU - Wang, T.

AU - MacGregor, S.J.

AU - Anderson, J.G.

AU - Woolsey, G.

PY - 2005

Y1 - 2005

N2 - Inactivation of Escherichia coli is examined using ultra-violet (UV) radiation from a pulsed xenon flashlamp. The light from the discharge has a broadband emission spectrum extending from the UV to the infrared region with a rich UV content. The flashlamp provides high-energy UV output using a small number of short-duration pulses (30 μs). The flashlamp is used with a monochromator to investigate the wavelength sensitivity of E. coli to inactivation by the pulsed UV light. Using 8 nm wide pulses of UV radiation, the most efficient inactivation is found to occur at around 270 nm and no inactivation is observed above 300 nm. A pyroelectric detector allows the energy dose to be determined at each wavelength, and a peak value for E. coli population reduction of 0.43 log per mJ/cm2 is measured at 270 nm. The results are compared with the published data available for continuous UV light sources.

AB - Inactivation of Escherichia coli is examined using ultra-violet (UV) radiation from a pulsed xenon flashlamp. The light from the discharge has a broadband emission spectrum extending from the UV to the infrared region with a rich UV content. The flashlamp provides high-energy UV output using a small number of short-duration pulses (30 μs). The flashlamp is used with a monochromator to investigate the wavelength sensitivity of E. coli to inactivation by the pulsed UV light. Using 8 nm wide pulses of UV radiation, the most efficient inactivation is found to occur at around 270 nm and no inactivation is observed above 300 nm. A pyroelectric detector allows the energy dose to be determined at each wavelength, and a peak value for E. coli population reduction of 0.43 log per mJ/cm2 is measured at 270 nm. The results are compared with the published data available for continuous UV light sources.

KW - UV inactivation

KW - escherichia coli

KW - e coli

KW - disinfection

KW - microorganism

KW - flashlamp

KW - water

UR - http://dx.doi.org/10.1016/j.watres.2005.04.067

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DO - 10.1016/j.watres.2005.04.067

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VL - 39

SP - 2921

EP - 2925

JO - Water Research

T2 - Water Research

JF - Water Research

SN - 0043-1354

IS - 13

ER -