气候变化领域集成服务门户(CCPortal): Source apportionment of highly time-resolved elements during a firework episode from a rural freeway site in Switzerland

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DOI	10.5194/acp-20-1657-2020
	Source apportionment of highly time-resolved elements during a firework episode from a rural freeway site in Switzerland
	Rai P.; Furger M.; Slowik J.G.; Canonaco F.; Fröhlich R.; Hüglin C.; Minguillón M.C.; Petterson K.; Baltensperger U.; Prévôt A.S.H.
发表日期	2020
ISSN	16807316
起始页码	1657
结束页码	1674
卷号	20 期号:3
英文摘要	The measurement of elements in PM10 was performed with 1h time resolution at a rural freeway site during summer 2015 in Switzerland using the Xact1 625 Ambient Metals Monitor. On average the Xact elements (without accounting for oxygen and other associated elements) make up about 20% of the total PM10 mass (14.6?g m-3). We conducted source apportionment by positive matrix factorisation (PMF) of the elemental mass measurable by the Xact (i.e. major elements heavier than Al), defined here as PM10el. Eight different sources were identified in PM10el (elemental PM10) mass driven by the sum of 14 elements (notable elements in brackets): Fireworks-I (K, S, Ba and Cl), Fireworks-II (K), sea salt (Cl), secondary sulfate (S), background dust (Si, Ti), road dust (Ca), non-exhaust traffic-related elements (Fe) and industrial elements (Zn and Pb). The major components were secondary sulfate and non-exhaust traffic-related elements followed by background dust and road dust factors, explaining 21%, 20%, 18% and 16% of the analysed PM10 elemental mass, respectively, with the factor mass not corrected for oxygen content. Further, there were minor contributions (on the order of a few percent) of sea salt and industrial sources. The regionally influenced secondary sulfate factor showed negligible resuspension, and concentrations were similar throughout the day. The significant loads of the non-exhaust traffic-related and road dust factors with strong diurnal variations highlight the continuing importance of vehicle-related air pollutants at this site. Enhanced control of PMF implemented via the SourceFinder software (SoFi Pro version 6.2, PSI, Switzerland) allowed for a successful apportionment of transient sources such as the two firework factors and sea salt, which remained mixed when analysed by unconstrained PMF. © 2019 EDP Sciences. All rights reserved.
关键词	concentration (composition)diurnal variation dust motorway particulate matter rural atmosphere sea salt source apportionment sulfate Switzerland
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132242
推荐引用方式 GB/T 7714	Rai P.,Furger M.,Slowik J.G.,et al. Source apportionment of highly time-resolved elements during a firework episode from a rural freeway site in Switzerland[J]. Atmospheric Chemistry and Physics,2020,20(3).
APA	Rai P..,Furger M..,Slowik J.G..,Canonaco F..,Fröhlich R..,...&Prévôt A.S.H..(2020).Source apportionment of highly time-resolved elements during a firework episode from a rural freeway site in Switzerland.,20(3).
MLA	Rai P.,et al."Source apportionment of highly time-resolved elements during a firework episode from a rural freeway site in Switzerland".20.3(2020).