Faculty of Mathematics, Physics and Informatics, Comenius University Bratislava |
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Bidirectional mass transfer‐based generation of plasma activated water mist with antibacterial propertiesSysolyatina E.V., Lavrikova A. Y., Loleyt R. A, Vasilieva E. V., Abdulkadieva M. A., Ermolaeva S. A., Sofronov A. V. |
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Abstract: Plasma‐activated water mist (PAWM) is obtained by the ignition of plasma within an air–vapor mixture. PAWM demonstrates significant antibacterial properties, decreasing loads of foodborne pathogens by a factor of 35.5 for Listeria monocytogenes, 166 for Salmonella Typhimurium, and 266 for Escherichia coli O157:H7 within 15 s. Bacterial biofilms have a similar species‐dependant susceptibility. Biofilms of L. monocytogenes, Salmonella Typhimurium, and E. coli O157:H7 are destroyed by 44%, 77%, and 71%, respectively, after being treated for 2 min. Obtained results suggest importance of short‐lived radicals, because PAWM condensate is not bactericidal. A new model of PAW generation as a cyclic process of oxidation reactive nitrogen species by reactive oxygen species, which occurs during effective bidirectional mass transfer between heavily humid air and water mist in plasma discharge, is presented.
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