Tuesday 8
F. Environmental and Medical Applications
Chair: J.-M. Pouvesle - Each talk is 10'+2' duration
› 15:20 - 15:35 (15min)
› Blaise
Experimental quantification of ultraviolet radiations and biocide active species in microwave argon plasma jet in open air
Gaëtan Wattieaux  1, *@  , Mohammed Yousfi  2, 1@  , Nofel Merbahi  1, 3@  , Marie-Pierre Castanié-Cornet  4@  
1 : LAPLACE-CNRS University of Toulouse  (LAPLACE-CNRS Toulouse)  -  Website
CNRS : UMR5213, Université Paul Sabatier - Toulouse III
118 Route de Narbonne 31062 TOULOUSE CEDEX 9 -  France
2 : LAPLACE-CNRS University of Toulouse  (LAPLACE-CNRS Toulouse)  -  Website
CNRS : UMR5213, Université Paul Sabatier - Toulouse III, Institut National Polytechnique de Toulouse
118 Route de Narbonne 31062 TOULOUSE CEDEX 9 -  France
3 : Laboratoire Plasma et Conversion d'Energie  (LAPLACE)  -  Website
CNRS : UMR5213, Université Paul Sabatier - Toulouse III, Institut National Polytechnique de Toulouse
118 Route de Narbonne 31062 TOULOUSE CEDEX 9 -  France
4 : Laboratoire de Microbiologie et Génétique Moléculaires-CNRS University of Toulouse  (LMGM-CNRS Toulouse)  -  Website
CNRS : UMR5213, Université Paul Sabatier - Toulouse III
118 Route de Narbonne 31062 TOULOUSE CEDEX 9 -  France
* : Corresponding author

Absorption and mainly emission spectrometry have been used to identify active species generated by a microwave induced surfatron plasma jet launched in open air and using argon flowing gas.The argon flow rate is kept constant at 1 L/min and
the microwave power is 40 W. We determined the ozone and atomic oxygen concentrations, ultraviolet C (UVC) irradiance, gas temperature, plasma electron density and excitation temperature. Most of these diagnostics are spatially resolved along
the plasma jet axis. Assessment of the biocide efficiency of the present low temperature plasma will be shown in the case of standard Gram-negative bacteria (Escherichia coli) and the main germicidal source of the jet is identified. A specific emphasis has been done for human health hazard assessment since simple solutions are reminded to respect safety standards for exposures to ozone and microwave leakage. These solutions should be adopted by users of microwave induced plasma in open air conditions because, according to the literature, this is not often the case.


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