English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/200619
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Source apportionment of highly time-resolved elements during a firework episode from a rural freeway site in Switzerland

AuthorsRai, Pragati; Furger, Markus; Slowik, Jay G.; Canonaco, Francesco; Fröhlich, Roman; Hüglin, Christoph; Minguillón, María Cruz ; Petterson, Krag; Baltensperger, Urs; Prévôt, André S. H.
KeywordsPM10
Trace elements
Air pollutants
Issue Date11-Feb-2020
PublisherCopernicus Publications
CitationAtmospheric Chemistry and Physics 20: 1657–1674 (2020)
AbstractThe measurement of elements in PM10 was performed with 1 h 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 µg 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.
Publisher version (URL)https://doi.org/10.5194/acp-20-1657-2020
URIhttp://hdl.handle.net/10261/200619
DOIhttp://dx.doi.org/10.5194/acp-20-1657-2020
Appears in Collections:(IDAEA) Artículos
Files in This Item:
File Description SizeFormat 
Source apportionment of highly time-resolved elements during a firework episode from a rural freeway site in Switzerland.pdfArtículo principal5,45 MBAdobe PDFThumbnail
View/Open
acp-20-1657-2020-supplement.pdfMaterial suplementario1,21 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.