Effects of various indoor environmental factors on the decay of chlorine dioxide gas concentration

Implication on its use against pandemic flu

Hitomi Tsutsumi, Fumihiko Shinoda, Shinichi Tanabe, Hitomi Takeuchi, Nobuhiro Hirasuga, Motohiko Iwase, Masakazu Setsujima, Kouichi Nakahara

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Pandemic flu is now a big concern all round the world. Prevention of the influenza virus using Air cleaning systems is very effective. Recently, air cleaning systems with the chlorine dioxide (ClO 2) gas have been developed. The ClO 2 gas is easily decomposed by indoor climate factors such as lighting, thermal environment, organic matter, and sound. Two types of experiments were conducted to evaluate the effects of indoor environmental factors on the decrease in the ClO 2 gas concentration and to calculate its reaction (decay) rate constant. The first experiment was conducted in an office room. Ten types of environmental conditions were examined. The ClO 2 gas concentration at the centre of the room was kept below a permissible exposure level to human beings throughout the 120-min experiment. High-humidity environment and illuminance had a significant impact on the decrease in the ClO 2 gas concentration. The second experiment was conducted in a thermostatic chamber using a Tedlar bag to measure the decrease in the ClO 2 concentration in detail and to calculate the reaction rate constant. The concentration of the ClO 2 gas in the Tedlar bag was measured every 1h for 6 h. Ten types of environmental conditions were examined. It was found that a high air temperature and light irradiation accelerated the decrease in the ClO 2 gas concentration; the latter had a more significant effect on the decrease in t he ClO 2 gas concentration. The results obtained from our exp eriments will be useful in using t he Cl O 2 gas against pandemic flu.

    Original languageEnglish
    Title of host publicationIAQ Conference
    Publication statusPublished - 2011
    EventAirborne Infection Control - Ventilation, IAQ, and Energy Conference, IAQ 2010 - Kuala Lumpur, Malaysia
    Duration: 2010 Nov 102010 Nov 12

    Other

    OtherAirborne Infection Control - Ventilation, IAQ, and Energy Conference, IAQ 2010
    CountryMalaysia
    CityKuala Lumpur
    Period10/11/1010/11/12

    Fingerprint

    Pandemics
    Chlorine
    Gases
    Polyethylene Terephthalates
    Air
    Cleaning
    Rate constants
    Experiments
    chlorine dioxide
    Humidity
    Orthomyxoviridae
    Lighting
    Climate
    Viruses
    Biological materials
    Reaction rates
    Atmospheric humidity
    Hot Temperature
    Acoustic waves
    Irradiation

    ASJC Scopus subject areas

    • Building and Construction
    • Environmental Engineering
    • Public Health, Environmental and Occupational Health

    Cite this

    Tsutsumi, H., Shinoda, F., Tanabe, S., Takeuchi, H., Hirasuga, N., Iwase, M., ... Nakahara, K. (2011). Effects of various indoor environmental factors on the decay of chlorine dioxide gas concentration: Implication on its use against pandemic flu. In IAQ Conference

    Effects of various indoor environmental factors on the decay of chlorine dioxide gas concentration : Implication on its use against pandemic flu. / Tsutsumi, Hitomi; Shinoda, Fumihiko; Tanabe, Shinichi; Takeuchi, Hitomi; Hirasuga, Nobuhiro; Iwase, Motohiko; Setsujima, Masakazu; Nakahara, Kouichi.

    IAQ Conference. 2011.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Tsutsumi, H, Shinoda, F, Tanabe, S, Takeuchi, H, Hirasuga, N, Iwase, M, Setsujima, M & Nakahara, K 2011, Effects of various indoor environmental factors on the decay of chlorine dioxide gas concentration: Implication on its use against pandemic flu. in IAQ Conference. Airborne Infection Control - Ventilation, IAQ, and Energy Conference, IAQ 2010, Kuala Lumpur, Malaysia, 10/11/10.
    Tsutsumi, Hitomi ; Shinoda, Fumihiko ; Tanabe, Shinichi ; Takeuchi, Hitomi ; Hirasuga, Nobuhiro ; Iwase, Motohiko ; Setsujima, Masakazu ; Nakahara, Kouichi. / Effects of various indoor environmental factors on the decay of chlorine dioxide gas concentration : Implication on its use against pandemic flu. IAQ Conference. 2011.
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    AU - Tanabe, Shinichi

    AU - Takeuchi, Hitomi

    AU - Hirasuga, Nobuhiro

    AU - Iwase, Motohiko

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