Mechanisms of Biocidal Activity of Dielectric Barrier Discharge Air Jet with Misting

摘要

Two nearly identical plasma jet-like systems with water misting were investigated for effective pathogen inactivation regimens on Escherichia coli in atmospheric conditions. Although the electrode construction is quite similar, we show that the concentration of active species generated at the exit of the discharge is quite different, and inactivation of bacteria by this treatment also varies. Inactivation and production rates of hydrogen peroxide, nitrate, and nitrite in liquid were higher when a single quartz barrier was utilized in the dielectric barrier discharge and one of the electrodes was open stainless steel.