Studying the fate of non-volatile organic compounds in a commercial plasma air purifier

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Author(s) Schmid, Stefan, Seiler, Cornelia, Gerecke, Andreas C., Haechler, Herbert, Hilbi, Hubert, Frey, Joachim, Weidmann, Simon, Meier, Lukas, Berchtold, Christian, Zenobi, Renato
Publication Type Journal Items, Publication Status: Published
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Title Studying the fate of non-volatile organic compounds in a commercial plasma air purifier
Author(s) Schmid, Stefan
Seiler, Cornelia
Gerecke, Andreas C.
Haechler, Herbert
Hilbi, Hubert
Frey, Joachim
Weidmann, Simon
Meier, Lukas
Berchtold, Christian
Zenobi, Renato
Journal or Series Title Journal of hazardous materials
Volume Number 256
Start Page 76
End Page 83
ISSN 0304-3894
Publisher Elsevier
Publication Place Amsterdam, NL
Publication Date 2013
Keyword(s) Commercial plasma air purifier
Corona plasma based air purifier
Non-volatile organic compounds
Oligomerized bovine serum albumin
Abstract Degradation of non-volatile organic compounds-environmental toxins (methyltriclosane and phenanthrene), bovine serum albumin, as well as bioparticles (Legionella pneumophila, Bacillus subtilis, and Bacillus anthracis)-in a commercially available plasma air purifier based on a cold plasma was studied in detail, focusing on its efficiency and on the resulting degradation products. This system is capable of handling air flow velocities of up to 3.0 m s(-1) (3200 L min(-1)), much higher than other plasma-based reactors described in the literature, which generally are limited to air flow rates below 10 L min(-1). Mass balance studies consistently indicated a reduction in concentration of the compounds/particles after passage through the plasma air purifier, 31% for phenanthrene, 17% for methyltriclosane, and 80% for bovine serum albumin. L. pneumophila did not survive passage through the plasma air purifier, and cell counts of aerosolized spores of B. subtilis and B. anthracis were reduced by 26- and 15-fold, depending on whether it was run at 10 Hz or 50 Hz, respectively. However rather than chemical degradation, deposition on the inner surfaces of the plasma air purifier occured. Our interpretation is that putative "degradation" efficiencies were largely due to electrostatic precipitation rather than to decomposition into smaller molecules.
DOI 10.1016/j.jhazmat.2013.04.021
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03430
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NEBIS System Number 000014488
Source Database ID WOS-000321171700010
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  author = "Schmid, Stefan and Seiler, Cornelia and Gerecke, Andreas C. and Haechler, Herbert and Hilbi, Hubert and Frey, Joachim and Weidmann, Simon and Meier, Lukas and Berchtold, Christian and Zenobi, Renato",
  title = "{S}tudying the fate of non-volatile organic compounds in a commercial plasma air purifier",
  journal = "Journal of hazardous materials",
  year = 2013,
  volume = "256",
  pages = "76--83",

E-Citations record created: Mon, 05 Aug 2013, 06:31:00 CET