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Research on the atmospheric secondary organic aerosol formation pathways based on multi-stage size-resolved observations
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Meng-xue TANG, Xiao-feng HUANG*, Dong-yi HE, Ning FENG, Ling-yan HE
China Environmental Science | 2026, 46(2) : 612 - 617
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China Environmental Science | 2026, 46(2): 612-617
• Air Pollution Control •
Research on the atmospheric secondary organic aerosol formation pathways based on multi-stage size-resolved observations
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Meng-xue TANG, Xiao-feng HUANG*, Dong-yi HE, Ning FENG, Ling-yan HE
Affiliations
  • Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
Published: 2026-02-20
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To investigate the particle size distribution and formation pathways of atmospheric secondary organic aerosols (SOA), size-resolved aerosol sampling was conducted in Chengdu. The results revealed a bimodal distribution dominated by fine particles, with mass concentration peaks observed at 0.56~1.0μm and 3.2~5.6μm. Organic matter was the most abundant component in both fine and coarse modes. SO42-, NH4+, and K+ were mainly present in the fine mode, while NO3-, Ca2+, and Mg2+ were enriched in the coarse mode, indicating a strong influence of soil dust on coarse particles. Source apportionment showed that SOA accounted for 67% of the total organic matter. Correlation analysis revealed that fine-mode SOA was significantly associated with SO42- and NH4+, while coarse-mode SOA was positively correlated with Ca2+, Mg2+, and water-soluble Fe, suggesting that the formation of coarse mode SOA was related to the heterogeneous reaction of soil dust containing transition metal element Fe. The differing correlations of pH and aerosol liquid water content with SOA across particle sizes highlight their complex and combined roles in SOA formation.

secondary organic aerosol(SOA)  /  fine particles  /  coarse particles  /  soil dust  /  water-soluble metal elements
唐梦雪, 黄晓锋, 何冬一, 冯凝, 何凌燕. 基于多级粒径段观测的大气二次有机气溶胶形成途径研究. 中国环境科学, 2026 , 46 (2) : 612 -617 .
Meng-xue TANG, Xiao-feng HUANG, Dong-yi HE, Ning FENG, Ling-yan HE. Research on the atmospheric secondary organic aerosol formation pathways based on multi-stage size-resolved observations[J]. China Environmental Science, 2026 , 46 (2) : 612 -617 .
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Year 2026 volume 46 Issue 2
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  • Receive Date：2025-07-05
  • Online Date：2026-10-08
  • Published：2026-02-20
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  • Received：2025-07-05
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    Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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