气候变化领域集成服务门户(CCPortal): Characterization of carbonaceous aerosols in Singapore: Insight from black carbon fragments and trace metal ions detected by a soot particle aerosol mass spectrometer

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DOI	10.5194/acp-20-5977-2020
	Characterization of carbonaceous aerosols in Singapore: Insight from black carbon fragments and trace metal ions detected by a soot particle aerosol mass spectrometer
	Rivellini L.-H.; Adam M.G.; Kasthuriarachchi N.; Lee A.K.Y.
发表日期	2020
ISSN	1680-7316
起始页码	5977
结束页码	5993
卷号	20 期号:10
英文摘要	Understanding sources and atmospheric processes that can influence the physiochemical properties of carbonaceous aerosols is essential to evaluate their impacts on air quality and climate. However, resolving the sources, emission characteristics, and aging processes of carbonaceous aerosols in complex urban environments remains challenging. In this work, a soot particle aerosol mass spectrometer (SP-AMS) was deployed to characterize organic aerosols (OAs), refractory black carbon (rBC), and trace metals in Singapore, a highly urbanized city with multiple local and regional air pollution sources in the tropical region. rBC (CC 1 CC 9 ) fragments and trace metal ions (K+, Na+, Ni+, V+, and Rb+) were integrated into our positive matrix factorization of OA. Two types of fossil fuel combustion-related OAs with different degrees of oxygenation were identified. This work provides evidence that over 90 % of rB+ originated from local combustion sources with a major part related to traffic and ∼ 30 % associated with fresh secondary organic aerosol (SOA) produced under the influence of shipping and industrial emission activities (e.g., refineries and petrochemical plants) during daytime. The results also show that ∼ 43 % of the total rB+ was emitted from local traffic, while the rest of the rBC fraction stemmed from multiple sources including vehicular sources, shipping, and industrial emissions, but was not fully resolved. There was only a weak association of the cooking-related OA component with rB+. Although there was no observable biomass burning episode during the sampling period, K+ and Rb+ were mainly associated with the more oxidized oxygenated OA component, indicating the potential contribution of regional biomass burning and/or coal combustion emissions to this aged OA component. Furthermore, the aerosol pollutants transported from the industrial area and shipping ports presented higher C+ 1 =C+ 3 and V+=Ni+ ratios than those associated with traffic. The observed association between Na+ and rB+ suggests that the contribution of anthropogenic emissions to total particulate sodium should not be ignored in coastal urban environments. Overall, this work demonstrates that rBC fragments and trace metal ions can improve our understanding of the sources, emission characteristics, and aging history of carbonaceous aerosol (OA and rB+) in this type of complex urban environment. © 2020 Author(s).
语种	英语
scopus关键词	aerosol; aerosol composition; air quality; black carbon; ion exchange; particulate matter; soot; source apportionment; trace metal; Singapore [Singapore (NTN)]; Singapore [Southeast Asia]
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/141329
作者单位	NUS Environmental Research Institute, National University of Singapore, Singapore, 117411, Singapore; Department of Civil and Environmental Engineering, National University of Singapore, Singapore, 117576, Singapore
推荐引用方式 GB/T 7714	Rivellini L.-H.,Adam M.G.,Kasthuriarachchi N.,et al. Characterization of carbonaceous aerosols in Singapore: Insight from black carbon fragments and trace metal ions detected by a soot particle aerosol mass spectrometer[J],2020,20(10).
APA	Rivellini L.-H.,Adam M.G.,Kasthuriarachchi N.,&Lee A.K.Y..(2020).Characterization of carbonaceous aerosols in Singapore: Insight from black carbon fragments and trace metal ions detected by a soot particle aerosol mass spectrometer.Atmospheric Chemistry and Physics,20(10).
MLA	Rivellini L.-H.,et al."Characterization of carbonaceous aerosols in Singapore: Insight from black carbon fragments and trace metal ions detected by a soot particle aerosol mass spectrometer".Atmospheric Chemistry and Physics 20.10(2020).