Spatial distributions of ozonolysis products from human surfaces in ventilated rooms.
clothing
computational fluid dynamics
human breathing
indoor air mixing
kinetic model
ventilation
Journal
Indoor air
ISSN: 1600-0668
Titre abrégé: Indoor Air
Pays: England
ID NLM: 9423515
Informations de publication
Date de publication:
11 2020
11 2020
Historique:
received:
09
01
2020
revised:
13
05
2020
accepted:
19
05
2020
pubmed:
2
6
2020
medline:
24
3
2021
entrez:
2
6
2020
Statut:
ppublish
Résumé
Ozone has adverse effects on human health. Skin oil on the human surface acts as an ozone sink indoors, producing oxidation products that can cause skin and respiratory irritations. Concentrations of ozone and oxidation products near human surfaces, including the breathing zone, can be modulated by indoor ventilation modes and human surface conditions. The objective of this study is to examine concentrations and spatial heterogeneity of ozone and ozonolysis products under representative ranges of indoor ventilation, clothing, and breathing conditions. Using computational fluid dynamics (CFD) simulation in conjunction with a chemical kinetic model, details of ozone reactions with the human surface and subsequent chemical reactions are examined. The results show that primary ozonolysis products are concentrated near the soiled clothing, while the secondary products are relatively well distributed throughout the room. Increasing indoor air mixing enhances the ozone deposition to the human surface, thereby resulting in higher emission rates of oxidation products in the room. Soiled clothing consumes more ozone than clean clothing and accordingly produces ~ 65% more primary products and ~15% more secondary products. The results also reveal that unsaturated hydrocarbons from the human breath, such as isoprene, contribute to only ~0.5% of ozone removal compared to ozone deposition to the human surface.
Substances chimiques
Air Pollutants
0
Ozone
66H7ZZK23N
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1229-1240Informations de copyright
© 2020 John Wiley & Sons A/S . Published by John Wiley & Sons Ltd.
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