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Ozone: Science & Engineering
The Journal of the International Ozone Association
Volume 31, 2009 - Issue 4
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Original Articles

An Evaluation of the Antimicrobial Effects of Gas-Phase Ozone

M.Y. Menetrez U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, Air Pollution Prevention and Control Division, Research Triangle Park, NC, USACorrespondence[email protected]
,
K.K. Foarde Research Triangle Institute, Center for Engineering and Environmental Sciences, RTP, NC, USA
,
T.D. Schwartz Research Triangle Institute, Center for Engineering and Environmental Sciences, RTP, NC, USA
,
T.R. Dean U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, Air Pollution Prevention and Control Division, Research Triangle Park, NC, USA
&
D.A. Betancourt U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, Air Pollution Prevention and Control Division, Research Triangle Park, NC, USA
Pages 316-325 | Received 12 Aug 2008, Accepted 25 Feb 2099, Published online: 22 Jul 2009
 
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Abstract

This project evaluated the effects of exposing a variety of microorganisms on porous and non-porous materials to elevated gaseous ozone concentrations ranging from 100 – 1000 ppm. Gypsum wallboard (porous) and glass slide (non-porous) building materials were used. Two fungi organisms, two bacteria organisms and two levels of relative humidity (RH) were tested. Increased humidity and non-porous surface exposure were found to increase the biocidal capability of high levels of ozone. The results of this study indicate that even at relatively high concentrations of ozone, it is difficult to get significant reductions of microorganisms on surfaces, especially on porous materials.

Notes

WHO, “Europe reports: Health Aspects of Air Pollution”, Bonn, Germany (2003).

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