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Tytuł:
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Fine particulate pollution driven by nitrate in the moisture urban atmospheric environment in the Pearl River Delta region of south China.
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Autorzy:
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Tao J; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China; South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, China. Electronic address: .
Huang J; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China.
Bian G; South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, China.
Zhang L; Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, Canada.
Zhou Z; Dongguan Sub-branch of Guangdong Ecological and Environmental Monitoring Center, Dongguan, China.
Zhang Z; South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, China.
Li J; RCE-TEA, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.
Miao Y; Chinese Academy of Meteorological Sciences, Beijing, China.
Yuan Z; Sailbri Cooper Inc., Tigard, Oregon, United States.
Sha Q; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China.
Xiao L; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China.
Wang B; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China.
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Źródło:
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Journal of environmental management [J Environ Manage] 2023 Jan 15; Vol. 326 (Pt A), pp. 116704. Date of Electronic Publication: 2022 Nov 08.
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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: London ; New York, Academic Press.
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MeSH Terms:
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Particulate Matter*/analysis
Air Pollutants*/analysis
Nitrates/analysis ; Vehicle Emissions/analysis ; Nitrogen Dioxide/analysis ; Environmental Monitoring ; Dust/analysis ; Coal/analysis ; Aerosols/analysis ; Nitrogen Oxides/analysis ; Seasons ; Carbon/analysis ; China ; Sulfates/analysis
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Contributed Indexing:
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Keywords: Nitrate; Nitrogen dioxide; Ozone; Regional transport; Source apportionment
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Substance Nomenclature:
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0 (Particulate Matter)
0 (Air Pollutants)
0 (Nitrates)
0 (Vehicle Emissions)
S7G510RUBH (Nitrogen Dioxide)
0 (Dust)
0 (Coal)
0 (Aerosols)
0 (Nitrogen Oxides)
7440-44-0 (Carbon)
0 (Sulfates)
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Entry Date(s):
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Date Created: 20221110 Date Completed: 20221206 Latest Revision: 20221206
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Update Code:
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20240104
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DOI:
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10.1016/j.jenvman.2022.116704
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PMID:
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36356536
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To identify potential sources of fine particles (PM 2.5 , with aerodynamic diameter (D a ) ≤ 2.5 μm) in urban Dongguan of south China, a comprehensive campaign was carried out in the whole 2019. Hourly PM 2.5 and its dominant chemical components including organic carbon (OC), elemental carbon (EC), water-soluble inorganic ions (WSIIs) and thirteen elements were measured using online instruments. Gaseous pollutants including NH 3 , HNO 3 , NO 2 , NO and O 3 and meteorological parameters were also synchronously measured. PM 2.5 was dominated by carbonaceous aerosols in summer and by WSIIs in the other seasons. PM 2.5 and its dominant chemical components mostly peaked around noon (10:00-14:00 LST). Furthermore, high PM 2.5 levels during the daytime were closely related with the increased NO 3 - levels. The high mass concentrations of NO 3 - in urban Dongguan during the daytime were likely related with regional transport of NO 3 - from suburban Dongguan, which was originated from the reaction between NO 2 and O 3 under the moisture condition during the nighttime. Seven major source factors for PM 2.5 including secondary sulfate, ship emission, traffic emission, secondary nitrate, industrial processes, soil dust and coal combustion were identified by positive matrix factorization (PMF) analysis, which contributed 26 ± 14%, 16 ± 16%, 16 ± 10%, 14 ± 11%, 12 ± 11%, 8 ± 6% and 8 ± 6%, respectively, to annual PM 2.5 mass concentration. Although secondary sulfate contributed much more than secondary nitrate to PM 2.5 on annual basis, the latter exceeded the former source factor when daily PM 2.5 mass concentration was higher than 60 μg m -3 , indicating the critical role nitrate played in PM 2.5 episode events.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier Ltd. All rights reserved.)
