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Tytuł:
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Size-resolved source apportionment of particulate matter from a megacity in northern China based on one-year measurement of inorganic and organic components.
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Autorzy:
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Tian Y; State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China. Electronic address: .
Harrison RM; School of Geography Earth and Environmental Science, University of Birmingham, Birmingham, B15 2TT, UK; Department of Environmental Sciences / Center of Excellence in Environmental Studies, King Abdulaziz University, PO Box 80203, Jeddah, 21589, Saudi Arabia.
Feng Y; State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China.
Shi Z; School of Geography Earth and Environmental Science, University of Birmingham, Birmingham, B15 2TT, UK.
Liang Y; State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China.
Li Y; State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China.
Xue Q; State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China.
Xu J; School of Geography Earth and Environmental Science, University of Birmingham, Birmingham, B15 2TT, UK.
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Źródło:
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Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2021 Nov 15; Vol. 289, pp. 117932. Date of Electronic Publication: 2021 Aug 07.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: Barking, Essex, England : Elsevier Applied Science Publishers, c1987-
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MeSH Terms:
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Air Pollutants*/analysis
Particulate Matter*/analysis
China ; Environmental Monitoring ; Particle Size ; Vehicle Emissions/analysis
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Contributed Indexing:
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Keywords: Organic marker; Particulate matter; Size-resolved source apportionment; Three-way factor analysis model
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Substance Nomenclature:
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0 (Air Pollutants)
0 (Particulate Matter)
0 (Vehicle Emissions)
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Entry Date(s):
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Date Created: 20210824 Date Completed: 20210929 Latest Revision: 20210929
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Update Code:
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20240105
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DOI:
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10.1016/j.envpol.2021.117932
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PMID:
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34426203
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This research apportioned size-resolved particulate matter (PM) contributions in a megacity in northern China based on a full year of measurements of both inorganic and organic markers. Ions, elements, carbon fractions, n-alkanes, polycyclic aromatic hydrocarbons (PAHs), hopanes and steranes in 9 p.m. size fractions were analyzed. High molecular weight PAHs concentrated in fine PM, while most other organic compounds showed two peaks. Both two-way and three-way receptor models were used for source apportionment of PM in different size ranges. The three-way receptor model gave a clearer separation of factors than the two-way model, because it uses a combination of chemical composition and size distributions, so that factors with similar composition but distinct size distributions (like more mature and less mature coal combustion) can be resolved. The three-way model resolved six primary and three secondary factors. Gasoline vehicles and coal and biomass combustion, nitrate and high relative humidity related secondary aerosol, and resuspended dust and diesel vehicles (exhaust and non-exhaust) are the top two contributors to pseudo-ultrafine (<0.43 μm), fine (0.43-2.1 μm) and coarse mode (>2.1 μm) PM, respectively. Mass concentration of PM from coal and biomass combustion, industrial emissions, and diesel vehicle sources showed a bimodal size distribution, but gasoline vehicles and resuspended dust exhibited a peak in the fine and coarse mode, separately. Mass concentration of sulphate, nitrate and secondary organic aerosol exhibited a bimodal distribution and were correlated with temperature, indicating strong photochemical processing and repartitioning. High relative humidity related secondary aerosol was strongly associated with size shifts of PM, NO 3 - and SO 4 2- from the usual 0.43-0.65 μm to 1.1-2.1 μm. Our results demonstrated the dominance of primary combustion sources in the <0.43 μm particle mass, in contrast to that of secondary aerosol in fine particle mass, and dust in coarse particle mass in the Northern China megacity.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
