Characterization of atmospheric PM2.5 sources at a Central European urban background site

Katarzyna Juda-Rezler , Magdalena Marta Reizer , Katarzyna Maciejewska , Barbara Błaszczak , Krzysztof Klejnowski

Abstract

For the purposes of this work, a first in Poland, full-year collection of daily PM2.5 (particulate matter with aerodynamic diameter smaller than 2.5 μm) samples was chemically analyzed to determine the contents of elemental and organic carbon, water-soluble inorganic ions and 21 minor and trace elements in PM in an urban background site in Warsaw. Annual mean PM2.5 concentration reached 18.8 μg/m3, with the lowest levels in summer (11.5 μg/m3 on average) and the highest in winter (27.5 μg/m3), with several episodes reaching over 80 μg/m3. Strong seasonal differences were observed mainly for the contents of nitrate and secondary organic carbon (SOC), while sulphate showed the least variability. Secondary species constituted on average 45% of PM2.5 mass, suggesting large influence of regional and long-range transport of pollutants. Source apportionment with the use of positive matrix factorization (PMF) method, supported by the analysis of enrichment factors, led to identification of six main sources of PM2.5 origin: residential combustion (fresh & aged aerosol) (46% of PM2.5 mass), traffic exhaust (21%) and non-exhaust (10%) emissions, mineral dust/construction works (12%), high-temperature processes (8%) and steel processing (3%). Including primary organic carbon (POC) and SOC as two separate constituents helped to distinguish between the primary and secondary sources of the aerosol. The identification of sources was also supported by investigating their yearly and weekly profiles, as well as the correlation of PM constituents with meteorological conditions, which are one of the main drivers of heat generation activities. We found that the most distinctive markers of PM sources in Warsaw are SOC, Cl− and As for residential combustion, NH4+, Sb and POC for road transport, Ca and Mg for construction works and SO42− for long-range transport of PM.
Author Katarzyna Juda-Rezler (FEE / CEP)
Katarzyna Juda-Rezler,,
- Chair of Environmental Protection
, Magdalena Marta Reizer (FEE / CEP)
Magdalena Marta Reizer,,
- Chair of Environmental Protection
, Katarzyna Maciejewska (FEE / CEP)
Katarzyna Maciejewska,,
- Chair of Environmental Protection
, Barbara Błaszczak
Barbara Błaszczak,,
-
, Krzysztof Klejnowski
Krzysztof Klejnowski,,
-
Journal seriesScience of the Total Environment, ISSN 0048-9697, e-ISSN 1879-1026
Issue year2020
Vol713
Pages1-15
Publication size in sheets0.7
Article number136729
Keywords in EnglishParticulate air pollution, Chemical composition, Source apportionment, Positive matrix factorization, Enrichment factors, Poland
ASJC Classification2304 Environmental Chemistry; 2305 Environmental Engineering; 2310 Pollution; 2311 Waste Management and Disposal
DOIDOI:10.1016/j.scitotenv.2020.136729
URL https://www.sciencedirect.com/science/article/pii/S0048969720302394?via%3Dihub
Languageen angielski
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1-s2.0-S0048969720302394-main.pdf 3.68 MB
Score (nominal)200
Score sourcejournalList
ScoreMinisterial score = 200.0, 03-09-2020, ArticleFromJournal
Publication indicators WoS Citations = 1; Scopus Citations = 3; GS Citations = 7.0; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.849; WoS Impact Factor: 2018 = 5.589 (2) - 2018=5.727 (5)
Citation count*7 (2020-09-03)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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