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

作　　者：Hengyi DUAN Xiaotu LIU Meilin YAN Yatao WU Zhaorong LIU 

机构地区：[1]Joint Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China

出　　处：《Frontiers of Environmental Science & Engineering》2016年第1期73-84,共12页环境科学与工程前沿（英文）

基　　金：This work was supported by the National Natural Science Foundation of China （Grant No. 40905069）, China EPA Charity Special Fund （No.201009032）, and State Key Laboratory Special Fund （No. 13Z05ESPCP）.

摘　　要：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 μg·m-3, respec- tively. Ethane （17.6 μg·m-3）, toluene （14.4 μg·m-3）, pro- pane （11.2 μg·m-3）, ethene （8.40 μg·m-3）, n-butane （6.87 μg·m-3）, and benzene （5.95 μg·m-3） showed the high median concentrations in indoor air. Dichloromethane, p- dichlorobenzene （p-DCB） and toluene exhibited extremely high levels in some residences, which were related with a number of indoor emission sources. Moreover, isoprene, p- dichlorobenzene 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.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 μg·m-3, respec- tively. Ethane （17.6 μg·m-3）, toluene （14.4 μg·m-3）, pro- pane （11.2 μg·m-3）, ethene （8.40 μg·m-3）, n-butane （6.87 μg·m-3）, and benzene （5.95 μg·m-3） showed the high median concentrations in indoor air. Dichloromethane, p- dichlorobenzene （p-DCB） and toluene exhibited extremely high levels in some residences, which were related with a number of indoor emission sources. Moreover, isoprene, p- dichlorobenzene 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.

关 键 词：indoor air Volatile organic compounds（VOCs） carbonyl compounds RESIDENCE 

分 类 号：X51[环境科学与工程—环境工程] O623.5[理学—有机化学]