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Propagation of argon surface discharge in long tubes at atmospheric pressure, is bactericidal effect and the effect of UV emission

Abstract : The objective of the presented work is the bio-decontamination of small diameter long tubes by direct exposure of the tube inner surface to the plasma of a pulsed corona discharge in dry or humid argon. Bactericidal tests were conducted with Escherichia coli strain DH-1 for various exposure times. Up to similar to 5.5 log(10) reduction was observed for E. coli exposed 44 cm away from the HV electrode, for a 20 minute treatment. The factors contributing to the observed bactericidal effect include desiccation, reactive oxygen species (OH), H2O2 accumulation in the liquid phase, and UV B (and possibly VUV) in dry argon.
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Conference papers
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https://hal-centralesupelec.archives-ouvertes.fr/hal-02398498
Contributor : Delphine Le Piolet <>
Submitted on : Saturday, December 7, 2019 - 3:54:24 PM
Last modification on : Thursday, September 17, 2020 - 12:26:03 PM

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  • HAL Id : hal-02398498, version 1

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Z. Kovalova, M. Leroy, Carolyn Jacobs, Michael J Kirkpatrick, Z. Machala, et al.. Propagation of argon surface discharge in long tubes at atmospheric pressure, is bactericidal effect and the effect of UV emission. 15th International Symposium on High Pressure Low Temperature Plasma Chemistry (HAKONE XV), Sep 2016, Brno, Czech Republic. pp.343-346. ⟨hal-02398498⟩

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