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DOI	10.5194/acp-23-3015-2023
	Characteristics of particulate-bound n-alkanes indicating sources of PM2.5 in Beijing, China
	Yang, Jiyuan; Lei, Guoyang; Liu, Chang; Wu, Yutong; Hu, Kai; Zhu, Jinfeng; Bao, Junsong; Lin, Weili; Jin, Jun
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	3015
结束页码	3029
卷号	23 期号:5 页码:15
英文摘要	The characteristics of n-alkanes and the contributions of various sources of fine particulate matter (PM2.5) in the atmosphere in Beijing were investigated. PM2.5 samples were collected at Minzu University of China between November 2020 and October 2021, and n-alkanes in the samples were analyzed by gas chromatography mass spectrometry. A positive matrix factorization analysis model and source indices (the main carbon peaks, carbon preference indices, and plant wax contribution ratios) were used to identify the sources of n-alkanes, to determine the contributions of different sources, and to explain the differences. The n-alkane concentrations were 4.51-153 ng m(-3) (mean 32.7 ng m(-3)), and the particulate-bound n-alkane and PM2.5 concentrations varied in parallel. There were marked seasonal and diurnal differences in the n-alkane concentrations (p < 0.01). The n-alkane concentrations in the different seasons decreased in the order of winter > spring > summer > fall. The mean concentration of each homolog was higher at night than in the day in all seasons. Particulate-bound n-alkanes were supplied by common anthropogenic and biogenic sources, and fossil fuel combustion was the dominant contributor. The positive matrix factorization model results indicated five sources of n-alkanes in PM2.5, which were coal combustion, diesel vehicle emissions, gasoline vehicle emissions, terrestrial plant release, and mixed sources. Vehicle emissions were the main sources of n-alkanes, contributing 57.6 %. The sources of PM2.5 can be indicated by n-alkanes (i.e., using n-alkanes as organic tracers). Vehicle exhausts strongly affect PM2.5 pollution. Controlling vehicle exhaust emissions is key to controlling n-alkanes and PM2.5 pollution in Beijing.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000944358200001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273536
作者单位	Minzu University of China; Beijing Normal University; Minzu University of China
推荐引用方式 GB/T 7714	Yang, Jiyuan,Lei, Guoyang,Liu, Chang,et al. Characteristics of particulate-bound n-alkanes indicating sources of PM2.5 in Beijing, China[J],2023,23(5):15.
APA	Yang, Jiyuan.,Lei, Guoyang.,Liu, Chang.,Wu, Yutong.,Hu, Kai.,...&Jin, Jun.(2023).Characteristics of particulate-bound n-alkanes indicating sources of PM2.5 in Beijing, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(5),15.
MLA	Yang, Jiyuan,et al."Characteristics of particulate-bound n-alkanes indicating sources of PM2.5 in Beijing, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.5(2023):15.