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Emission Rates of Volatile Organic Compounds from Humans

[Image: see text] Human-emitted volatile organic compounds (VOCs) are mainly from breath and the skin. In this study, we continuously measured VOCs in a stainless-steel environmentally controlled climate chamber (22.5 m(3), air change rate at 3.2 h(–1)) occupied by four seated human volunteers using...

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Autores principales: Wang, Nijing, Ernle, Lisa, Bekö, Gabriel, Wargocki, Pawel, Williams, Jonathan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9022422/
https://www.ncbi.nlm.nih.gov/pubmed/35389619
http://dx.doi.org/10.1021/acs.est.1c08764
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author Wang, Nijing
Ernle, Lisa
Bekö, Gabriel
Wargocki, Pawel
Williams, Jonathan
author_facet Wang, Nijing
Ernle, Lisa
Bekö, Gabriel
Wargocki, Pawel
Williams, Jonathan
author_sort Wang, Nijing
collection PubMed
description [Image: see text] Human-emitted volatile organic compounds (VOCs) are mainly from breath and the skin. In this study, we continuously measured VOCs in a stainless-steel environmentally controlled climate chamber (22.5 m(3), air change rate at 3.2 h(–1)) occupied by four seated human volunteers using proton transfer reaction time-of-flight mass spectrometry and gas chromatography mass spectrometry. Experiments with human whole body, breath-only, and dermal-only emissions were performed under ozone-free and ozone-present conditions. In addition, the effect of temperature, relative humidity, clothing type, and age was investigated for whole-body emissions. Without ozone, the whole-body total emission rate (ER) was 2180 ± 620 μg h(–1) per person (p(–1)), dominated by exhaled chemicals. The ERs of oxygenated VOCs were positively correlated with the enthalpy of the air. Under ozone-present conditions (∼37 ppb), the whole-body total ER doubled, with the increase mainly driven by VOCs resulting from skin surface lipids/ozone reactions, which increased with relative humidity. Long clothing (more covered skin) was found to reduce the total ERs but enhanced certain chemicals related to the clothing. The ERs of VOCs derived from this study provide a valuable data set of human emissions under various conditions and can be used in models to better predict indoor air quality, especially for highly occupied environments.
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spelling pubmed-90224222022-04-21 Emission Rates of Volatile Organic Compounds from Humans Wang, Nijing Ernle, Lisa Bekö, Gabriel Wargocki, Pawel Williams, Jonathan Environ Sci Technol [Image: see text] Human-emitted volatile organic compounds (VOCs) are mainly from breath and the skin. In this study, we continuously measured VOCs in a stainless-steel environmentally controlled climate chamber (22.5 m(3), air change rate at 3.2 h(–1)) occupied by four seated human volunteers using proton transfer reaction time-of-flight mass spectrometry and gas chromatography mass spectrometry. Experiments with human whole body, breath-only, and dermal-only emissions were performed under ozone-free and ozone-present conditions. In addition, the effect of temperature, relative humidity, clothing type, and age was investigated for whole-body emissions. Without ozone, the whole-body total emission rate (ER) was 2180 ± 620 μg h(–1) per person (p(–1)), dominated by exhaled chemicals. The ERs of oxygenated VOCs were positively correlated with the enthalpy of the air. Under ozone-present conditions (∼37 ppb), the whole-body total ER doubled, with the increase mainly driven by VOCs resulting from skin surface lipids/ozone reactions, which increased with relative humidity. Long clothing (more covered skin) was found to reduce the total ERs but enhanced certain chemicals related to the clothing. The ERs of VOCs derived from this study provide a valuable data set of human emissions under various conditions and can be used in models to better predict indoor air quality, especially for highly occupied environments. American Chemical Society 2022-04-07 2022-04-19 /pmc/articles/PMC9022422/ /pubmed/35389619 http://dx.doi.org/10.1021/acs.est.1c08764 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Wang, Nijing
Ernle, Lisa
Bekö, Gabriel
Wargocki, Pawel
Williams, Jonathan
Emission Rates of Volatile Organic Compounds from Humans
title Emission Rates of Volatile Organic Compounds from Humans
title_full Emission Rates of Volatile Organic Compounds from Humans
title_fullStr Emission Rates of Volatile Organic Compounds from Humans
title_full_unstemmed Emission Rates of Volatile Organic Compounds from Humans
title_short Emission Rates of Volatile Organic Compounds from Humans
title_sort emission rates of volatile organic compounds from humans
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9022422/
https://www.ncbi.nlm.nih.gov/pubmed/35389619
http://dx.doi.org/10.1021/acs.est.1c08764
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