气候变化领域集成服务门户(CCPortal): Strong evidence for the continued contribution of lead deposited during the 20th century to the atmospheric environment in London of today

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DOI	10.1073/pnas.2102791118
	Strong evidence for the continued contribution of lead deposited during the 20th century to the atmospheric environment in London of today
	Resongles E.; Dietze V.; Green D.C.; Harrison R.M.; Ochoa-Gonzalez R.; Tremper A.H.; Weiss D.J.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:26
英文摘要	Although leaded gasoline was banned at the end of the last century, lead (Pb) remains significantly enriched in airborne particles in large cities. The remobilization of historical Pb deposited in soils from atmospheric removal has been suggested as an important source providing evidence for the hypothetical longterm persistency of lead, and possibly other pollutants, in the urban environment. Here, we present data on Pb isotopic composition in airborne particles collected in London (2014 to 2018), which provide strong support that lead deposited via gasoline combustion still contributes significantly to the lead burden in present-day London. Lead concentration and isotopic signature of airborne particles collected at a heavily trafficked site did not vary significantly over the last decade, suggesting that sources remained unchanged. Lead isotopic composition of airborne particles matches that of road dust and topsoils and can only be explained with a significant contribution (estimate of 32 ± 10 to 43 ± 9% based on a binary mixing model) of Pb from leaded gasoline. The lead isotopes furthermore suggest significant contributions from nonexhaust traffic emissions, even though isotopic signatures of anthropogenic sources are increasingly overlapping. Lead isotopic composition of airborne particles collected at building height shows a similar signature to that collected at street level, suggesting effective mixing of lead within the urban street canyon. Our results have important implications on the persistence of Pb in urban environments and suggest that atmospheric Pb reached a baseline in London that is difficult to decrease further with present policy measures. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Aerosols; Contaminant persistence; Lead isotopes; Source tracing; Urban air pollution
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238504
作者单位	Department of Earth Science and Engineering, Imperial College London, London, SW7AZ, United Kingdom; HydroSciences Montpellier, University of Montpellier, CNRS (Centre national de la recherche scientifique), IRD (Institut de Recherche pour le Développement), Montpellier, 34090, France; Air Quality Department, Research Center Human Biometeorology, German Meteorological Service, Freiburg, 79104, Germany; Environmental Research Group, School of Public Health, Imperial College London, London, W12 0BZ, United Kingdom; School of Geography Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, United Kingdom; Department of Environmental Sciences, King Abdulaziz University, Jeddah, 21589, Saudi Arabia; Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, 21589, Saudi Arabia; Department of European Projects, Foundation for the Promotion of Applied Scientific Research and Technology of Asturias, Oviedo, 33011, Spain; Department of Civil and Environmental Enginee...
推荐引用方式 GB/T 7714	Resongles E.,Dietze V.,Green D.C.,et al. Strong evidence for the continued contribution of lead deposited during the 20th century to the atmospheric environment in London of today[J],2021,118(26).
APA	Resongles E..,Dietze V..,Green D.C..,Harrison R.M..,Ochoa-Gonzalez R..,...&Weiss D.J..(2021).Strong evidence for the continued contribution of lead deposited during the 20th century to the atmospheric environment in London of today.Proceedings of the National Academy of Sciences of the United States of America,118(26).
MLA	Resongles E.,et al."Strong evidence for the continued contribution of lead deposited during the 20th century to the atmospheric environment in London of today".Proceedings of the National Academy of Sciences of the United States of America 118.26(2021).