Ozone-initiated single-digit nanoparticle emissions from humans

Shen Yang, Gabriel Bekö, Pawel Wargocki, Joonas Vanhanen, Jonathan Williams, Dusan Licina*

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    Elevated exposure to nanoparticles has been linked to adverse health consequences, given their high specific surface area and deep penetration into human lungs. Similar to outdoors, nanoparticles in buildings are important precursors that form larger particles via coagulation and condensation. Indoor nanoparticles can originate both from outdoors, and from indoor emissions, such as cooking and personal care products. Ozone-initiated chemistry also contributes to formation of indoor nanoparticles.
    Humans play an important role in indoor chemistry (Weschler, 2016). However, their impact on nanoparticle generation indoors is unknown. While we know that ozone reacts quickly with constituents of lipids on exposed skin (Weschler, 2016), nanoparticle generation caused by ozone-human chemistry remains unexplored. Within the framework of the Indoor Chemical Human Emissions and Reactivity (ICHEAR) project (Bekö et al., submitted), we were the first to measure and report 1.18-4 nm nanoparticle emissions following ozone-initiated reactions occurring in the presence of humans. We also investigated the influence of clothing and age on nanoparticle emissions. These preliminary results provide important new insights into ozone-human reactions associated with nanoparticle generation and ultimately exposures.
    Original languageEnglish
    Title of host publication16th International Conference on Indoor Air Quality and Climate (INDOOR AIR 2020) : Proceedings of a meeting held 1 November 2020, Online.
    PublisherInternational Society of Indoor Air Quality and Climate
    Publication date2020
    ISBN (Electronic)978-1-7138-2360-5
    Publication statusPublished - 2020
    Event 16th Conference of the International Society of Indoor Air Quality & Climate - Online
    Duration: 1 Nov 20204 Nov 2020
    Conference number: 16


    Conference 16th Conference of the International Society of Indoor Air Quality & Climate


    • Indoor chemistry
    • Ozone
    • Nanocluster aerosol
    • Chamber study
    • Clothing


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