AEM
Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrowReprints and Permissions
Right arrow Copyright Information
Right arrow Books from ASM Press
Right arrow MicrobeWorld
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Cho, M.
Right arrow Articles by Yoon, J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Cho, M.
Right arrow Articles by Yoon, J.
Agricola
Right arrow Articles by Cho, M.
Right arrow Articles by Yoon, J.

 Previous Article  |  Next Article 

Applied and Environmental Microbiology, April 2003, p. 2284-2291, Vol. 69, No. 4
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.4.2284-2291.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Disinfection of Water Containing Natural Organic Matter by Using Ozone-Initiated Radical Reactions

Min Cho,1 Hyenmi Chung,2 and Jeyong Yoon1*

School of Chemical Engineering, College of Engineering, Seoul National University, Shilim-dong, Gwanak-gu, Seoul 151-742,1 Water Microbiology Division, National Institute of Environmental Research, Kyungseo-Dong, Seo-Ku, Inchon 404-170, Korea2

Received 15 July 2002/ Accepted 6 January 2003

Ozone is widely used to disinfect drinking water and wastewater due to its strong biocidal oxidizing properties. Recently, it was reported that hydroxyl radicals (·OH), resulting from ozone decomposition, play a significant role in microbial inactivation when Bacillus subtilis endospores were used as the test microorganisms in pH controlled distilled water. However, it is not yet known how natural organic matter (NOM), which is ubiquitous in sources of drinking water, affects this process of disinfection by ozone-initiated radical reactions. Two types of water matrix were considered for this study. One is water containing humic acid, which is commercially available. The other is water from the Han River. This study reported that hydroxyl radicals, initiated by the ozone chain reaction, were significantly effective at B. subtilis endospore inactivation in water containing NOM, as well as in pH-controlled distilled water. The type of NOM and the pH have a considerable effect on the percentage of disinfection by hydroxyl radicals, which ranged from 20 to 50%. In addition, the theoretical T value of hydroxyl radicals for 2-log B. subtilis removal was estimated to be about 2.4 x 104 times smaller than that of ozone, assuming that there is no synergistic activity between ozone and hydroxyl radicals.

* Corresponding author. Mailing address: School of Chemical Engineering, College of Engineering, Seoul National University, San 56-1, Shilim-dong, Gwanak-gu, Seoul 151-742, Korea. Phone: 82 2 880 8941. Fax: 82 2 876 8941. E-mail: jeyong{at}snu.ac.kr.

Applied and Environmental Microbiology, April 2003, p. 2284-2291, Vol. 69, No. 4
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.4.2284-2291.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:



Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
J. Bacteriol. Microbiol. Mol. Biol. Rev. Eukaryot. Cell All ASM Journals

Copyright © 2003 by the American Society for Microbiology. All rights reserved.