Sources of primary and secondary organic aerosol and their diurnal   variations

doi:10.1016/j.jhazmat.2013.10.047

CORC > 北京大学 > 环境科学与工程学院

	Sources of primary and secondary organic aerosol and their diurnal variations
	Zheng, Mei ; Zhao, Xiuying ; Cheng, Yuan ; Yan, Caiqing ; Shi, Wenyan ; Zhang, Xiaolu ; Weber, Rodney J. ; Schauer, James J. ; Wang, Xinming ; Edgerton, Eric S.
刊名	journal of hazardous materials
	2014
关键词	Organic aerosol Source apportionment Diurnal variation Primary and secondary sources AIR-POLLUTION SOURCES SOUTHEASTERN UNITED-STATES FINE PARTICULATE MATTER POLYCYCLIC AROMATIC-HYDROCARBONS POSITIVE MATRIX FACTORIZATION ATLANTA SUPERSITE EXPERIMENT SOURCE APPORTIONMENT MEXICO-CITY CHEMICAL-COMPOSITION ELEMENTAL CARBON
DOI	10.1016/j.jhazmat.2013.10.047
英文摘要	PM2.5, as one of the criteria pollutants regulated in the U.S. and other countries due to its adverse health impacts, contains more than hundreds of organic pollutants with different sources and formation mechanisms. Daytime and nighttime PM2.5 samples from the August Mini-Intensive Gas and Aerosol Campaign (AMIGAS) in the southeastern U.S. were collected during summer 2008 at one urban site and one rural site, and were analyzed for organic carbon (OC), elemental carbon (EC), water soluble organic carbon (WSOC), and various individual organic compounds including some important tracers for carbonaceous aerosol sources by gas chromatography-mass spectrometry. Most samples exhibited higher daytime OC concentration, while higher nighttime OC was found in a few events at the urban site. Sources, formation mechanisms and composition of organic aerosol are complicated and results of this study showed that it exhibited distinct diurnal variations. With detailed organic tracer information, sources contributing to particulate DC were identified: higher nighttime OC concentration occurring in several occasions was mainly contributed by the increasing primary emissions at night, especially diesel exhaust and biomass burning; whereas sources responsible for higher daytime DC concentration included secondary organic aerosol (SOA) formation (e.g., cis-pinonic acid and non-biomass burning WSOC) together with traffic emissions especially gasoline engine exhaust. Primary tracers from combustion related sources such as EC, polycyclic aromatic hydrocarbons, and hopanes and steranes were significantly higher at the urban site with an urban to rural ratio between 5 and 8. However, this urban-rural difference for secondary components was less significant, indicating a relatively homogeneous distribution of SOA spatially. We found cholesterol concentrations, a typical tracer for meat cooking, were consistently higher at the rural site especially during the daytime, suggesting the likely additional sources for this tracer at rural site and that it should be used with caution as meat cooking tracer in rural areas in the future. (C) 2013 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000331021200063&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Engineering, Environmental; Engineering, Civil; Environmental Sciences; SCI(E); EI; PubMed; 3; ARTICLE; mzheng@pku.edu.cn; 536-544; 264
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158780]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Zheng, Mei,Zhao, Xiuying,Cheng, Yuan,et al. Sources of primary and secondary organic aerosol and their diurnal variations[J]. journal of hazardous materials,2014.
APA	Zheng, Mei.,Zhao, Xiuying.,Cheng, Yuan.,Yan, Caiqing.,Shi, Wenyan.,...&Edgerton, Eric S..(2014).Sources of primary and secondary organic aerosol and their diurnal variations.journal of hazardous materials.
MLA	Zheng, Mei,et al."Sources of primary and secondary organic aerosol and their diurnal variations".journal of hazardous materials (2014).