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  Effect of Ozone, Clothing, Temperature, and Humidity on the Total OH Reactivity Emitted from Humans

Zannoni, N., Li, M., Wang, N., Ernle, L., Bekö, G., Wargocki, P., et al. (2021). Effect of Ozone, Clothing, Temperature, and Humidity on the Total OH Reactivity Emitted from Humans. Environmental Science & Technology, 55(20), 13614-13624. doi:10.1021/acs.est.1c01831.

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Genre: Journal Article

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 Creators:
Zannoni, Nora1, Author              
Li, Mengze1, Author              
Wang, Nijing1, Author              
Ernle, Lisa1, Author              
Bekö , Gabriel, Author
Wargocki, Pawel, Author
Langer, Sarka, Author
Weschler, Charles J., Author
Morrison, Glenn, Author
Williams, Jonathan1, Author              
Affiliations:
1Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826285              

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 Abstract: People influence indoor air chemistry through their chemical emissions via breath and skin. Previous studies showed that direct measurement of total OH reactivity of human emissions matched that calculated from parallel measurements of volatile organic compounds (VOCs) from breath, skin, and the whole body. In this study, we determined, with direct measurements from two independent groups of four adult volunteers, the effect of indoor temperature and humidity, clothing coverage (amount of exposed skin), and indoor ozone concentration on the total OH reactivity of gaseous human emissions. The results show that the measured concentrations of VOCs and ammonia adequately account for the measured total OH reactivity. The total OH reactivity of human emissions was primarily affected by ozone reactions with organic skin-oil constituents and increased with exposed skin surface, higher temperature, and higher humidity. Humans emitted a comparable total mixing ratio of VOCs and ammonia at elevated temperature-low humidity and elevated temperature-high humidity, with relatively low diversity in chemical classes. In contrast, the total OH reactivity increased with higher temperature and higher humidity, with a larger diversity in chemical classes compared to the total mixing ratio. Ozone present, carbonyl compounds were the dominant reactive compounds in all of the reported conditions.

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Language(s): eng - English
 Dates: 2021-09-30
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1021/acs.est.1c01831
 Degree: -

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Title: Environmental Science & Technology
  Abbreviation : Environ. Sci. Technol.
Source Genre: Journal
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Affiliations:
Publ. Info: Easton, PA : American Chemical Society
Pages: - Volume / Issue: 55 (20) Sequence Number: - Start / End Page: 13614 - 13624 Identifier: ISSN: 0013-936X
CoNE: https://pure.mpg.de/cone/journals/resource/954921342157