气候变化领域集成服务门户(CCPortal): Observing ozone chemistry in an occupied residence

CCPortal

DOI	10.1073/pnas.2018140118
	Observing ozone chemistry in an occupied residence
	Liu Y.; Misztal P.K.; Arata C.; Weschler C.J.; Nazaroff W.W.; Goldstein A.H.
发表日期	2021
ISSN	00278424
卷号	118 期号:6
英文摘要	Outdoor ozone transported indoors initiates oxidative chemistry, forming volatile organic products. The influence of ozone chemistry on indoor air composition has not been directly quantified in normally occupied residences. Here, we explore indoor ozone chemistry in a house in California with two adult inhabitants. We utilize space- and time-resolved measurements of ozone and volatile organic compounds (VOCs) acquired over an 8-wk summer campaign. Despite overall low indoor ozone concentrations (mean value of 4.3 ppb) and a relatively low indoor ozone decay constant (1.3 h−1), we identified multiple VOCs exhibiting clear contributions from ozone-initiated chemistry indoors. These chemicals include 6-methyl-5-hepten-2-one (6-MHO), 4-oxopentanal (4-OPA), nonenal, and C8-C12 saturated aldehydes, which are among the commonly reported products from laboratory studies of ozone interactions with indoor surfaces and with human skin lipids. These VOCs together accounted for ≥12% molecular yield with respect to house-wide consumed ozone, with the highest net product yield for nonanal (≥3.5%), followed by 6-MHO (2.7%) and 4-OPA (2.6%). Although 6-MHO and 4-OPA are prominent ozonolysis products of skin lipids (specifically squalene), ozone reaction with the body envelopes of the two occupants in this house are insufficient to explain the observed yields. Relatedly, we observed that ozone-driven chemistry continued to produce 6-MHO and 4-OPA even after the occupants had been away from the house for 5 d. These observations provide evidence that skin lipids transferred to indoor surfaces made substantial contributions to ozone reactivity in the studied house. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Exposure; Indoor; Ozonolysis; Residential; Squalene
语种	英语
scopus关键词	ozone; volatile organic compound; airflow; Article; California; chemical parameters; controlled study; mathematical computing; mathematical model; molecular yield; oxidation; ozone layer; ozonolysis; priority journal; residential area
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180680
作者单位	State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, Beijing, 100871, China; Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, United States; Department of Chemistry, University of California, Berkeley, CA 94720, United States; Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, NJ 08854, United States; International Centre for Indoor Environment and Energy, Technical University of Denmark, Lyngby, 2800, Denmark; Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720, United States; Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, TX 78712, United States
推荐引用方式 GB/T 7714	Liu Y.,Misztal P.K.,Arata C.,et al. Observing ozone chemistry in an occupied residence[J],2021,118(6).
APA	Liu Y.,Misztal P.K.,Arata C.,Weschler C.J.,Nazaroff W.W.,&Goldstein A.H..(2021).Observing ozone chemistry in an occupied residence.Proceedings of the National Academy of Sciences of the United States of America,118(6).
MLA	Liu Y.,et al."Observing ozone chemistry in an occupied residence".Proceedings of the National Academy of Sciences of the United States of America 118.6(2021).