著者

住友 恒 金子 光美

出版者

Japan Society of Civil Engineers

雑誌

衛生工学研究論文集 (ISSN:09134069)

巻号頁・発行日

vol.19, pp.128-135, 1983 (Released:2010-03-17)

参考文献数

7

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For the purpose of leveling up safty in water supply, the quantification of virus concentration in water resource is required, and one of the most important basic data required for the quantification or the quantitative prediction is the decay constant of viruse in natural water. Therefore, the natural decay or inactivation of Coxsackie-B virus is observed and measured in a cirulative channel (diameter 40cm, width 10cm, depth 20cm) in a laboratory. The experimental conditions are controlled in temperature and sunlight. The former is by a regulative heater and the latter is by a window shutter. The results are summarized in the following forms as κθ=κ20 (1.175) (θ-20), κ20=1.41 (in sunlight condition) and κ'θ=κ'20 (1.143) (θ-20), k'20 =0.87 (in dark condition), where kθ is the decay constant (1/day) in the first order reaction under the temperature θ(°C). The mechanism of the inactivation is also briefly discussed in this paper.