Characteristics of carbonyls and volatile organic compounds (VOCs) in residences in Beijing, China

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• 作者：Hengyi Duan ; Xiaotu Liu ; Meilin Yan…
• 关键词：indoor air ; Volatile organic compounds (VOCs) ; carbonyl compounds ; residence
• 刊名：Frontiers of Environmental Science & Engineering
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：10
• 期：1
• 页码：73-84
• 全文大小：805 KB
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• 作者单位：Hengyi Duan (1)
  Xiaotu Liu (1)
  Meilin Yan (1)
  Yatao Wu (1)
  Zhaorong Liu (1)
  
  1. Joint Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
  
• 刊物主题：Environment, general;
• 出版者：Springer Berlin Heidelberg
• ISSN：2095-221X

文摘

Volatile organic compounds (VOCs) and carbonyl compounds were measured both indoors and outdoors in 50 residences of Beijing in heating (December, 2011) and non-heating seasons (April/May, 2012). SUMMA canisters for VOCs and diffusive samplers for carbonyl compounds were deployed for 24 h at each site, and 94 compounds were quantified. Formaldehyde, acetone and acetaldehyde were the most abundant carbonyl compounds both indoors and outdoors with indoor median concentrations being 32.1, 21.7 and 15.3 渭g路m鈭?, respectively. Ethane (17.6 渭g路m鈭?), toluene (14.4 渭g路m鈭?), propane (11.2 渭g路m鈭?), ethene (8.40 渭g路m鈭?), n-butane (6.87 渭g路m鈭?), and benzene (5.95 渭g路m鈭?) showed the high median concentrations in indoor air. Dichloromethane, pdichlorobenzene (p-DCB) and toluene exhibited extremely high levels in some residences, which were related with a number of indoor emission sources. Moreover, isoprene, pdichlorobenzene and carbonyls showed median indoor/ outdoor (I/O) ratios larger than 3, indicating their indoor sources were prevailing. Chlorinated compounds like CFCs were mainly from outdoor sources for their I/O ratios being less than 1. In addition, indoor concentrations between two sampling seasons varied with different compounds. Carbonyl compounds and some chlorinated compounds had higher concentrations in the non-heating season, while alkanes, alkenes, aromatic compounds showed an increase in the heating season. Indoor concentration of VOCs and carbonyls were influenced by locations, interior decorations and indoor activities, however the specific sources for indoor VOCs and carbonyls could not be easily identified. The findings obtained in this study would significantly enhance our understandings on the prevalent and abundant species of VOCs as well as their concentrations and sources in Beijing residences. Keywords indoor air Volatile organic compounds (VOCs) carbonyl compounds residence