气候变化领域集成服务门户(CCPortal): Identification of PM2.5 sources contributing to both Brown carbon and reactive oxygen species generation in winter in Beijing; China

CCPortal

DOI	10.1016/j.atmosenv.2020.118069
	Identification of PM2.5 sources contributing to both Brown carbon and reactive oxygen species generation in winter in Beijing; China
	Yan C.; Ma S.; He Q.; Ding X.; Cheng Y.; Cui M.; Wang X.; Zheng M.
发表日期	2021
ISSN	1352-2310
卷号	246
英文摘要	Better understanding of fine particulate matter (PM2.5) composition and sources associated with brown carbon (BrC) and reactive oxygen species (ROS) are essential for developing effective air quality control strategies to mitigate climate warming and protect human health. To identify the common chemical composition and sources associated with BrC and ROS, BrC light absorption and hydroxyl radical (·OH), one of the most reactive ROS, were measured for the same batch of filter samples collected in Beijing, China during a winter sampling period covering days with different pollution levels, together with detailed chemical composition analysis, including major components and individual organic and inorganic source-specific tracers. The results showed that both light absorption of BrC and ·OH generation by per mass PM2.5 decreased with increase of PM2.5 mass concentrations, which could be primarily attributed to the predominant roles played by secondary inorganic aerosols in the increased PM2.5 mass, while both of them increased with the fractions of water-soluble organic carbon (WSOC) in PM2.5. WSOC and combustion-related sources were found to be the common and major contributors to both BrC and ·OH generation in Beijing winter. However, BrC exhibited better correlations with fossil source WSOC, while ·OH better correlated with biomass burning source related WSOC. During the study period, fossil sources especially coal combustion were more important sources for BrC, while biomass burning played a relatively stronger role in ·OH generation. © 2020 Elsevier Ltd
英文关键词	Air quality; Chemical analysis; Coal combustion; Light absorption; Organic carbon; Oxygen; Quality control; Reactive oxygen species; Water absorption; Biomass-burning; Chemical composition analysis; Chemical compositions; Fine particulate matter (PM2.5); Hydroxyl radicals; Inorganic sources; Secondary inorganic aerosol; Water-soluble organic carbon; Bromine compounds
语种	英语
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169110
作者单位	SKL-ESPC and BIC-ESAT, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; Environment Research Institute, Shandong University, Qingdao, 266237, China; Urban Environment and Ecology Research Center, South China Institute of Environmental Sciences (SCIES), Ministry of Environmental Protection (MEP), Guangzhou, 510655, China; State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; School of Environment, Harbin Institute of Technology, Harbin, 150001, China; College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225009, China
推荐引用方式 GB/T 7714	Yan C.,Ma S.,He Q.,et al. Identification of PM2.5 sources contributing to both Brown carbon and reactive oxygen species generation in winter in Beijing; China[J],2021,246.
APA	Yan C..,Ma S..,He Q..,Ding X..,Cheng Y..,...&Zheng M..(2021).Identification of PM2.5 sources contributing to both Brown carbon and reactive oxygen species generation in winter in Beijing; China.Atmospheric Environment,246.
MLA	Yan C.,et al."Identification of PM2.5 sources contributing to both Brown carbon and reactive oxygen species generation in winter in Beijing; China".Atmospheric Environment 246(2021).