Effects of various indoor environmental factors on the decay of chlorine dioxide gas concentration: Implications of its use against pandemic influenza

Hitomi Tsutsumi, Fumihiko Shinoda, Shinichi Tanabe, Masakazu Setsujima, Kouichi Nakahara

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    Air-cleaning systems using a low concentration of chlorine dioxide (ClO 2) gas for prevention against infection by the influenza virus have been developed. ClO 2 gas is easily decomposed by indoor climate factors. Three experiments were conducted to evaluate the effects of indoor environmental factors on the decrease of ClO 2 gas concentration. The reaction (decay) rate constant was also determined. High air temperatures and light irradiation accelerated the decrease of ClO 2 gas concentration; the latter had the greatest influence on the decrease of ClO 2 gas concentration among the conditions. A quicker decay of concentration and greater value of the reaction rate constant of ClO 2 was found when a UV lamp was used; this is because the gas absorbs irradiation in the UV range. ClO 2 gas concentration was significantly reduced when an evaporative humidifier was employed due to adsorption and a chemical reaction between the gas and the filter in the humidifier.

    Original languageEnglish
    Pages (from-to)643-657
    Number of pages15
    JournalHVAC and R Research
    Volume18
    Issue number4
    DOIs
    Publication statusPublished - 2012 Aug 1

    Fingerprint

    Chlorine
    Gases
    Rate constants
    Irradiation
    Ultraviolet lamps
    chlorine dioxide
    Air
    Viruses
    Reaction rates
    Chemical reactions
    Cleaning
    Adsorption
    Experiments

    ASJC Scopus subject areas

    • Building and Construction

    Cite this

    Effects of various indoor environmental factors on the decay of chlorine dioxide gas concentration : Implications of its use against pandemic influenza. / Tsutsumi, Hitomi; Shinoda, Fumihiko; Tanabe, Shinichi; Setsujima, Masakazu; Nakahara, Kouichi.

    In: HVAC and R Research, Vol. 18, No. 4, 01.08.2012, p. 643-657.

    Research output: Contribution to journalArticle

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