Division of Environmental Physics - User: student
Faculty of Mathematics, Physics and Informatics, Comenius University Bratislava

Streamer Corona and Transient Spark in Air for Bio-decontamination of Water and Surfaces

Machala Z., Tarabová B., Pelach M., Hensel K., Janda M., Šikurová L..
20th International Symposium on Plasma Chemistry ISPC 20, Philadelphia (USA), July 24-29, CD-ROM (2011)

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Abstract:

Two types of positive DC discharges in atmospheric air pressure (streamer corona and transient spark) were tested for bio-decontamination of bacteria in water solution. Both generate cold non-equilibrium
plasma. The highest efficiency was achieved with the transient spark in flowing regime. Streamer corona was efficient when the treated solution flew through the active corona region. Electro-spraying was observed and resulted in fast bio-decontamination. Bacteria were handled and their population evaluated by standard microbiological cultivation procedures. Oxidation stress measurements in the cell membrane indicated that radicals and reactive oxygen species have the major role among the bio-decontamination mechanisms.