Inactivation of MS2 Phage and <I>Cryptosporidium parvum</I> Oocysts Using UV-A from High-Intensity Light-Emitting Diode for Water Disinfection
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概要
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In this study, high-intensity, UV-A (ranging from 360 to 370 nm, peak wavelength at 365 nm) produced by a light-emitting diode was used for the inactivation of MS2 phage and <I>Cryptosporidium parvum</I> oocyst. In the irradiation experiment with MS2 phage, approximately 44 and 65 J/cm<SUP>2</SUP> of UV-A were required to obtain -2 and -3 log inactivations, respectively. The -2 and -3 log inactivations of <I>Cryptosporidium</I> oocysts required 338 and 508 J/cm<SUP>2</SUP> UV-A, respectively, which were 7.7 - 7.8 times greater than those required for MS2 phage. The possibility that high-intensity UV-A irradiation can inactivate both protozoa and viruses (phage) was demonstrated in this study.
著者
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Akutagawa Masatake
Institute of Technology and Science, The University of Tokushima
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Kinouchi Yohsuke
Institute of Technology and Science, The University of Tokushima
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Hashimoto Atsushi
Department Of Anesthesiology Aichi Medical University
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MAWATARI Kazuaki
Institute of Health Sciences, University of Tokushima, Japan
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OTA Naotomo
Department of Civil Engineering, Anan National College of Technology, Japan
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NISHIMURA Kazuyuki
Department of Life and Environmental Sciences, Prefectural University of Hiroshima, Japan
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HIRATA Tsuyoshi
Department of Life and Environmental Sciences, Azabu University, Japan
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TAKAHASHI Akira
Institute of Health Sciences, University of Tokushima, Japan
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KINOUCHI Yohsuke
Institute of Technology and Sciences, University of Tokushima, Japan
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