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Primary emissions versus secondary formation of fine particulate matter in the most polluted city (Shijiazhuang) in North China
Huang, Ru Jin1,2; Wang, Yichen1,2; Cao, Junji1,2; Lin, Chunshui1,2,3; Duan, Jing1,2; Chen, Qi4; Li, Yongjie5; Gu, Yifang1,2; Yan, Jin1,2; Xu, Wei1,2,3; Fröhlich, Roman6; Canonaco, Francesco6; Bozzetti, Carlo6; Ovadnevaite, Jurgita3; Ceburnis, Darius3; Canagaratna, Manjula R.7; Jayne, John7; Worsnop, Douglas R.7; El-Haddad, Imad6; Prevot, Andre S.H.6; O'Dowd, Colin D.3
Source PublicationAtmospheric Chemistry and Physics

Particulate matter (PM) pollution is a severe environmental problem in the Beijing-Tianjin-Hebei (BTH) region in North China. PM studies have been conducted extensively in Beijing, but the chemical composition, sources, and atmospheric processes of PM are still relatively less known in nearby Tianjin and Hebei. In this study, fine PM in urban Shijiazhuang (the capital of Hebei Province) was characterized using an Aerodyne quadrupole aerosol chemical speciation monitor (Q-ACSM) from 11 January to 18 February in 2014. The average mass concentration of non-refractory submicron PM (diameter <1 μm, NR-PM1) was 178±101 μg mĝ'3, and it was composed of 50 % organic aerosol (OA), 21 % sulfate, 12 % nitrate, 11 % ammonium, and 6 % chloride. Using the multilinear engine (ME-2) receptor model, five OA sources were identified and quantified, including hydrocarbon-like OA from vehicle emissions (HOA, 13 %), cooking OA (COA, 16 %), biomass burning OA (BBOA, 17 %), coal combustion OA (CCOA, 27 %), and oxygenated OA (OOA, 27 %). We found that secondary formation contributed substantially to PM in episodic events, whereas primary emissions were dominant (most significant) on average. The episodic events with the highest NR-PM1 mass range of 300-360 μg mĝ'3 were comprised of 55 % of secondary species. On the contrary, a campaign-average low OOA fraction (27 %) in OA indicated the importance of primary emissions, and a low sulfur oxidation degree (FSO4) of 0.18 even at RH >90 % hinted at insufficient oxidation. These results suggested that in Shijiazhuang in wintertime fine PM was mostly from primary emissions without sufficient atmospheric aging, indicating opportunities for air quality improvement by mitigating direct emissions. In addition, secondary inorganic and organic (OOA) species dominated in pollution events with high-RH conditions, most likely due to enhanced aqueous-phase chemistry, whereas primary organic aerosol (POA) dominated in pollution events with low-RH and stagnant conditions. These results also highlighted the importance of meteorological conditions for PM pollution in this highly polluted city in North China.

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Indexed BySCIE
WOS Research AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS SubjectEnvironmental Sciences ; Meteorology & Atmospheric Sciences
WOS IDWOS:000459317500003
Scopus ID2-s2.0-85062093668
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Cited Times [WOS]:51   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
Corresponding AuthorHuang, Ru Jin
Affiliation1.Key Laboratory of Aerosol Chemistry and Physics, State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China
2.CAS Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi'an, 710061, China
3.School of Physics and Centre for Climate and Air Pollution Studies, National University of Ireland Galway, Galway, Ireland
4.State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
5.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Taipa, Macao
6.Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen, 5232, Switzerland
7.Aerodyne Research Inc., Billerica, United States
Recommended Citation
GB/T 7714
Huang, Ru Jin,Wang, Yichen,Cao, Junji,et al. Primary emissions versus secondary formation of fine particulate matter in the most polluted city (Shijiazhuang) in North China[J]. Atmospheric Chemistry and Physics,2019,19(4):2283-2298.
APA Huang, Ru Jin.,Wang, Yichen.,Cao, Junji.,Lin, Chunshui.,Duan, Jing.,Chen, Qi.,Li, Yongjie.,Gu, Yifang.,Yan, Jin.,Xu, Wei.,Fröhlich, Roman.,Canonaco, Francesco.,Bozzetti, Carlo.,Ovadnevaite, Jurgita.,Ceburnis, Darius.,Canagaratna, Manjula R..,Jayne, John.,Worsnop, Douglas R..,El-Haddad, Imad.,...&O'Dowd, Colin D..(2019).Primary emissions versus secondary formation of fine particulate matter in the most polluted city (Shijiazhuang) in North China.Atmospheric Chemistry and Physics,19(4),2283-2298.
MLA Huang, Ru Jin,et al."Primary emissions versus secondary formation of fine particulate matter in the most polluted city (Shijiazhuang) in North China".Atmospheric Chemistry and Physics 19.4(2019):2283-2298.
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