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Inner surface biofilm inactivation by atmospheric pressure helium porous plasma jet
Author(s) -
Lu Peng,
Ziuzina Dana,
Cullen Patrick J.,
Bourke Paula
Publication year - 2018
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201800055
Subject(s) - human decontamination , helium , porosity , atmospheric pressure plasma , jet (fluid) , materials science , plasma , biofilm , diffuser (optics) , analytical chemistry (journal) , chemical engineering , chemistry , chromatography , composite material , bacteria , optics , waste management , mechanics , light source , physics , organic chemistry , quantum mechanics , biology , engineering , genetics
We present a helium porous plasma jet based on gas diffuser, designed with the aim of decontaminating inner surfaces of contaminated structures, e.g., pipes. The porous plasma jet operates with three discharge modes in ambient air and inside a vessel. Its decontamination capacity is demonstrated by evaluating the inactivation efficacy of biofilm form of Pseudomonas aeruginosa , adherent to inner surface of a glass vial. Plasma treatments for 5 min with filament mode and double region helium discharge mode reduced bacterial numbers by 2.4 and 2.5 Log 10 CFU/ml. Plasma treatment with double region air‐like discharge mode was the most effective, reducing bacterial cells by 4.5 Log 10 CFU/ml, which demonstrates porous plasma jet could provide an efficient approach for inner surface decontamination.