Kinetics and Bacterial Inactivation Induced by Peroxynitrite in Electric Discharges in Air

Murielle Naitali 1 Jean-Marie Herry 1 Eugen Hnatiuc 2 Georges Kamgang Jean-Louis Brisset
1 MICALIS - MICrobiologie de l'ALImentation au Service de la Santé humaine
2 Catedra de Bazele Electrotehnici
Abstract : The mechanism of bacterial inactivation by electric discharges (non-thermal plasma) is examined on the basis of the action of the formed peroxynitrite and hydrogen peroxide on the external membrane of bacteria. A model accounts for the gas to liquid transfer of the active species which react with the bacterial wall at the liquid surface or /and in the bulk solution. Direct exposure to the glidarc discharge induces a pseudo zero order decay of the bacterial concentration, followed by a pseudo 1st order step for low concentrations. Post-discharge reactions develop after switching off the discharge according to a 1st order mechanism and show that active species drift in the solution. Additionally the bactericidal properties of pure water exposed to the discharge (i.e., ``Plasma Activated Water'') was evidenced even 24 h after performing the plasma treatment.
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Submitted on : Thursday, July 13, 2017 - 3:40:36 PM
Last modification on : Thursday, February 28, 2019 - 5:44:38 PM

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Murielle Naitali, Jean-Marie Herry, Eugen Hnatiuc, Georges Kamgang, Jean-Louis Brisset. Kinetics and Bacterial Inactivation Induced by Peroxynitrite in Electric Discharges in Air. Plasma Chemistry and Plasma Processing, Springer Verlag, 2012, 32 (4), pp.675-692. ⟨10.1007/s11090-012-9383-y⟩. ⟨hal-01562093⟩

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