Sequential Inactivation of Bacillus Subtilis Spores with Ultraviolet Radiation and Iodine
Publication: Journal of Environmental Engineering
Volume 134, Issue 7
Abstract
Bacillus subtilis spores were used as an indicator organism to characterize the effects of UV radiation and iodine, alone and in combination, as disinfectants for water. Spore exposures to UV radiation were conducted in shallow, well-mixed batch reactors under collimated beams. Three (essentially) monochromatic collimated UV sources were used in these experiments, with characteristic emission wavelengths of 222, 254, and . Iodine exposures were conducted in well-mixed batch reactors. Synergism was demonstrated when UV (at certain doses) and iodine were used as sequential disinfectants; synergism was attributed to UV-induced damage that enhanced the susceptibility of spores to iodine.
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Acknowledgments
The writers would like to acknowledge the NASA Specialized Center for Research and Training (NSCORT) for funding this research and Ushio America, Inc. for providing the excimer lampsNASA.
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Information & Authors
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Published In
Journal of Environmental Engineering
Volume 134 • Issue 7 • July 2008
Pages: 513 - 520
Copyright
© 2008 ASCE.
History
Received: Jun 5, 2006
Accepted: Dec 21, 2007
Published online: Jul 1, 2008
Published in print: Jul 2008
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