Propagation of argon surface discharge in long tubes at atmospheric pressure, its bactericidal effect and the effect of UV emission
Kovaľová Z., Leroy M., Jacobs C., Kirkpatrick M., Machala Z., Lopes F., Laux C.O., DuBow M., Odic E.
15th High Pressure Low Temperature Plasma Chemistry Symposium (HAKONE XV), Brno (Czech republic), September 11-16, p. 343-346 (2016)
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Abstrakt: 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 ~5.5 log10 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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