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Molecular characteristics and impact factors of PM2.5-bound sulfur-containing organics in downtown Chongqing
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Xin-quan ZHAO1, Yang SONG2, Bo LIANG2, Hao-hui TANG1, Sen-hua WANG1, Jing CHEN1, Mi TIAN1, *
China Environmental Science | 2025, 45(6) : 2961 - 2973
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China Environmental Science | 2025, 45(6): 2961-2973
• Air Pollution Control •
Molecular characteristics and impact factors of PM2.5-bound sulfur-containing organics in downtown Chongqing
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Xin-quan ZHAO1, Yang SONG2, Bo LIANG2, Hao-hui TANG1, Sen-hua WANG1, Jing CHEN1, Mi TIAN1, *
Affiliations
  • 1.College of Environment and Ecology, Chongqing University, Chongqing 400045, China
  • 2.Chongqing Academy of Metrology and Quality Inspection, Chongqing 401123, China
Published: 2025-06-20
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The molecular compositions of organic components in winter PM2.5 samples from a typical urban area of Chongqing were analyzed by electrospray ionization coupled with ion mobility spectrometry-time of flight mass spectrometry (ESI-IMS-TOF-MS). Sulfur-containing organics (CHOS+CHNOS) were important components in organic aerosol, and their relative abundance accounted for more than 70% on average. IMS-derived collision cross section, collision-induced dissociation, and Kendrick mass defect analyses verified the presence of organosulfates (OSs). Molecular characterization results indicated that sulfur-containing organics were dominated by carbohydrate and lignin species and had higher oxidation degree in Chongqing urban area compared with other cities. Biogenic and anthropogenic precursors were important sources of sulfur-containing organics. The relationships between aerosol liquid water content, acidity and inorganic sulfate with sulfur-containing organics suggested that aqueous-phase chemistry and acid-catalyzed chemistry play important roles in the formation of sulfur-containing organics.

organic aerosols  /  ion mobility spectrometry  /  sulfur-containing organics  /  molecular characteristics  /  influencing factors
Xin-quan ZHAO, Yang SONG, Bo LIANG, Hao-hui TANG, Sen-hua WANG, Jing CHEN, Mi TIAN. Molecular characteristics and impact factors of PM2.5-bound sulfur-containing organics in downtown Chongqing[J]. China Environmental Science, 2025 , 45 (6) : 2961 -2973 .
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Year 2025 volume 45 Issue 6
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  • Receive Date：2024-11-27
  • Online Date：2026-02-27
  • Published：2025-06-20
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  • Received：2024-11-27
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Affiliations
    1.College of Environment and Ecology, Chongqing University, Chongqing 400045, China
    2.Chongqing Academy of Metrology and Quality Inspection, Chongqing 401123, 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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