Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2018140118 |
Observing ozone chemistry in an occupied residence | |
Yingjun Liu; Pawel K. Misztal; Caleb Arata; Charles J. Weschler; William W Nazaroff; Allen H. Goldstein | |
2021-02-09 | |
发表期刊 | Proceedings of the National Academy of Sciences |
出版年 | 2021 |
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. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/313956 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Yingjun Liu,Pawel K. Misztal,Caleb Arata,et al. Observing ozone chemistry in an occupied residence[J]. Proceedings of the National Academy of Sciences,2021. |
APA | Yingjun Liu,Pawel K. Misztal,Caleb Arata,Charles J. Weschler,William W Nazaroff,&Allen H. Goldstein.(2021).Observing ozone chemistry in an occupied residence.Proceedings of the National Academy of Sciences. |
MLA | Yingjun Liu,et al."Observing ozone chemistry in an occupied residence".Proceedings of the National Academy of Sciences (2021). |
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