Université Paris Descartes EA 4064, Faculté des Sciences Pharmaceutiques et Biologiques, Laboratoire Santé Publique et Environnement, 4 avenue de l'Observatoire, 75006 Paris, France.
Sci Total Environ. 2011 Sep 15;409(20):4480-3. doi: 10.1016/j.scitotenv.2011.04.058. Epub 2011 Jul 27.
Indoor aldehydes may result from ozone-initiated chemistry, mainly documented by experimental studies. As part of an environmental investigation included in the PARIS birth cohort, the aim of this study was to examine ozone contribution to airborne aldehyde formation in Paris homes. Formaldehyde, acetaldehyde and hexaldehyde levels, as well as styrene, nitrogen dioxide and nicotine concentrations, comfort parameters and carbon dioxide levels, were measured twice during the first year of life of the babies. Ambient ozone concentrations were collected from the closest background station of the regional air monitoring network. Traffic-related nitrogen oxide concentrations in front of the dwellings were estimated by an air pollution dispersion model. Home characteristics and families' way of life were described by questionnaires. Stepwise multiple linear regression models were used to link aldehyde levels with ambient ozone concentrations and a few aldehyde precursors involved in oxidation reactions, adjusting for other indoor aldehyde sources, comfort parameters and traffic-related nitrogen oxides. A 4 and 11% increase in formaldehyde and hexaldehyde levels was pointed out when 8-hour ozone concentrations increased by 20 μg/m(3). The influence of potential precursors such as indoor styrene level and frequent use of air fresheners, containing unsaturated volatile organic compounds as terpenes, was also found. Thus, our results suggest that ambient ozone can significantly impact indoor air quality, especially with regard to formaldehyde and hexaldehyde levels.
室内醛类物质可能是由臭氧引发的化学反应产生的，主要有实验研究证实。作为巴黎出生队列环境调查的一部分，本研究旨在考察臭氧对巴黎家庭空气中醛类形成的贡献。在婴儿出生后的第一年，两次测量了甲醛、乙醛和正己醛水平，以及苯乙烯、二氧化氮和尼古丁浓度、舒适参数和二氧化碳水平。采集了最近的区域空气质量监测网络背景站的环境臭氧浓度。通过空气污染扩散模型估算了住宅前与交通有关的氮氧化物浓度。通过问卷调查描述了家庭特征和生活方式。采用逐步多元线性回归模型，将醛水平与环境臭氧浓度以及参与氧化反应的几种醛前体相关联，同时考虑了其他室内醛来源、舒适参数和交通相关氮氧化物。当 8 小时臭氧浓度增加 20μg/m(3)时，甲醛和正己醛水平分别增加了 4%和 11%。室内苯乙烯水平和经常使用空气清新剂（含有作为萜烯的不饱和挥发性有机化合物）等潜在前体的影响也被发现。因此，我们的研究结果表明，环境臭氧可能会显著影响室内空气质量，特别是甲醛和正己醛水平。
