1. Comparative Inactivation of Bacillus subtilis Spores Using a DBD-Driven Xenon Iodide Excilamp and a Conventional Mercury Lamp
- Author
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Mykola M Guivan, Hisayoshi Kurokawa, Kazunori Kadowaki, Hideki Motomura, Takashi Kamikozawa, and Masafumi Jinno
- Subjects
chemistry.chemical_classification ,Nuclear and High Energy Physics ,Iodide ,chemistry.chemical_element ,Dielectric barrier discharge ,Sterilization (microbiology) ,Condensed Matter Physics ,Photochemistry ,Iodine ,Excimer ,law.invention ,Mercury (element) ,Mercury-vapor lamp ,Xenon ,chemistry ,law - Abstract
In this paper, we compared the inactivation of Bacillus subtilis spores in water by means of a dielectric-barrier-discharge (DBD)-driven XeI* excilamp and a low-pressure mercury lamp. The main part ( ~ 76%) of the excilamp output was due to the B → X transition of XeI* exciplex at 253 nm. It is shown for the first time that a better sterilization action is achieved with the DBD-driven XeI* excilamp compared with the monochromatic mercury lamp at the same UV dose. The contribution of an atomic iodine emission in the range of 178-207 nm has been confirmed. Germ-reduction experiments with the XeI* excilamp have been carried out in a steady-state mode and in a water-flow reactor.
- Published
- 2010
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