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INVESTIGATION OF GAS-PHASE OZONE AS A POTENTIAL BIOCIDE
Citation:
Foarde, K. K., D. W. VanOsdell, AND R. S. STEIBER. INVESTIGATION OF GAS-PHASE OZONE AS A POTENTIAL BIOCIDE. APPLIED OCCUPATIONAL AND ENVIRONMENTAL HYGIENE 12(8):535-542, (1997).
Impact/Purpose:
Published Journal Article
Description:
The paper presents data on the effect of ozone on both vegetative and spore-forming fungi as well as on spore-forming bacteria. (NOTE: Despite the wide use of ozone generators in indoor air cleaning, there is little research data on ozone's biocidal activity in the gas phase.) Dried suspensions of the test organisms were exposed to a range of ozone concentrations from 3 to 10 ppm in a 50-L Teflon-coated stainless steel chamber. A two-phase study was performed. Phase 1 was an extensive series of tests on the efficacy of ozone itself. Tests using glass slides to minimize losses of ozone were carried out under conditions of high (90%) and low (30%) relative humidity (RH). For the organisms used in this study, ozone concentrations in the range of 6 to almost 10 ppm were required for significant kill. Organisms exposed under high RH conditions were generally more susceptible to ozone. Phase 2 employed actual building materials as the test surface. No kill was demonstrated even at 9 ppm ozone.
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INVESTIGATION OF GAS-PHASE OZONE AS A POTENTIAL BIOCIDE (PDF, NA pp, 2862 KB, about PDF)