Atmospheric lead pollution in a typical megacity: Evidence from lead isotopes

doi:10.1016/j.scitotenv.2021.145810

	Atmospheric lead pollution in a typical megacity: Evidence from lead isotopes
	Tao, Zhenghua 1,2; Guo, Qingjun 1,3; Wei, Rongfei 1; Dong, Xinyuan 1,2; Han, Xiaokun 4; Guo, Zhaobing 5
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021-07-15
卷号	778 页码:10
关键词	Lead isotopes Aerosol Coal combustion Vehicle exhaust Natural source Typical megacity
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2021.145810
通讯作者	Guo, Qingjun(guoqj@igsnrr.ac.cn)
英文摘要	Atmospheric lead (Pb) pollution has adverse health effects on humans, while the sources and atmospheric process of Pb are key scientific problems. In this study, the concentrations and isotopic composition of Pb in fine particulate matter (PM2.5), coal and street dust samples collected from a typical megacity Beijing were analyzed to identify the sources of atmospheric Pb. Results showed that the Pb concentrations in PM2.5 were high in winter (168.1 +/- 32.0 ng/m(3)) and lowin summer (27.7 +/- 9.1 ng/m(3)), whereas Pb isotopic values presented opposite variation trends. The abnormally elevated Pb concentrations in winter were probably related to coal combustion, while declined Pb concentration in summer may be attributed to favorable meteorological parameters such as high temperature, high wind speed, and frequent rain events. Pb isotopic ratios indicated that anthropogenic sources (coal combustion and vehicle exhaust) and natural sources were the main contributors to Pb in PM2.5. Combined with the binary model, the anthropogenic sources predominantly contributed to Pb in the Beijing atmosphere by approximately 85% annually, while the natural sources accounted for the rest of 15%. More specifically, the contribution of natural sources was about 9.4% in spring, 29.7% in summer, 16.0% in autumn and 6.1% in winter, suggesting that natural sources might contribute more lead into the atmosphere during clear days. Furthermore, the contribution of the vehicle exhaust to atmospheric Pb was nonnegligible in megacity, highlighting that the ownership of motor vehicles in megacity should be regulated and more efforts should be paid to strengthen vehicle emission standard. This study may enrich the reservoir of Pb isotopic composition in nature and provides a new method to investigate the Pb migration and transformation in the environment, and also serve as a theoretical reference for pollution control measures. (C) 2021 Published by Elsevier B.V.
资助项目	National Key Research and Development Program of China[2017YFC0212703] ; National Natural Science Foundation of China[41625006] ; National Natural Science Foundation of China[41761144066] ; National Natural Science Foundation of China[41561144005] ; National Natural Science Foundation of China[41890824] ; National Natural Science Foundation of China[41890822] ; CrossTeam ; Key Laboratory Cooperative Research Special Project of Chinese Academy of Sciences (CAS Light of West China Program)
WOS关键词	TRACE-METAL CONCENTRATIONS ; SOURCE APPORTIONMENT ; PARTICULATE MATTER ; HEAVY-METALS ; URBAN-ENVIRONMENT ; NORTHERN CHINA ; AIR-POLLUTION ; PB ; PM2.5 ; AEROSOLS
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000655719100014
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; CrossTeam ; Key Laboratory Cooperative Research Special Project of Chinese Academy of Sciences (CAS Light of West China Program)
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/163987]
专题	中国科学院地理科学与资源研究所
通讯作者	Guo, Qingjun
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Environm Remediat, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 4.Tianjin Univ, Sch Earth Syst Sci, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China 5.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Nanjing 210044, Peoples R China
推荐引用方式 GB/T 7714	Tao, Zhenghua,Guo, Qingjun,Wei, Rongfei,et al. Atmospheric lead pollution in a typical megacity: Evidence from lead isotopes[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,778:10.
APA	Tao, Zhenghua,Guo, Qingjun,Wei, Rongfei,Dong, Xinyuan,Han, Xiaokun,&Guo, Zhaobing.(2021).Atmospheric lead pollution in a typical megacity: Evidence from lead isotopes.SCIENCE OF THE TOTAL ENVIRONMENT,778,10.
MLA	Tao, Zhenghua,et al."Atmospheric lead pollution in a typical megacity: Evidence from lead isotopes".SCIENCE OF THE TOTAL ENVIRONMENT 778(2021):10.