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Nitrogen Atmospheric Pressure Post Discharges for Surface Biological Decontamination inside Small Diameter Tubes
Author(s) -
Pointu AnneMarie,
Ricard André,
Odic Emmanuel,
Ganciu Mihai
Publication year - 2008
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.200800016
Subject(s) - afterglow , metastability , atmospheric pressure , nitrogen , tube (container) , quartz , analytical chemistry (journal) , human decontamination , excited state , chemistry , gas filled tube , oxygen , spectroscopy , materials science , atomic physics , environmental chemistry , composite material , physics , oceanography , gamma ray burst , organic chemistry , astronomy , quantum mechanics , geology , nuclear physics
A nitrogen afterglow at atmospheric pressure has recently been described as able to transport active species over long distances in small diameter tubes, with a biocidal effect. For a discharge gas composed of nitrogen, either of high purity or with some controlled ppm of oxygen, survival curves are presented. The afterglow, flowing at 40 slm in a cylindrical quartz tube with 8 mm internal diameter is studied using emission spectroscopy. Fundamental or excited states of atomic or molecular species of parent gases are detected and evaluated. Their absolute concentration is measured along the tube axis. Correlated to transport equations, results give information on the creation and destruction reactions of these species, especially of the O( 1 S) metastable state of O, the species that has been shown to boost the biocidal effect.