南京秋冬季非难熔性亚微米颗粒物来源解析

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Abstract In this study, Aerodyne high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) was used to monitor the chemical components (including organic matter, nitrate, sulfate, ammonium and chloride) and characteristics of non-refractory submicron aerosol (NR-PM₁) in autumn and winter in the northern suburbs of Nanjing, and PMF & ME-2 (positive matrix factorization & multilinear engine) source analysis mode was used to identify sources of complex organic compounds. During the observation period, the contributions of organic matter, nitrate, sulfate, ammonium and chloride to NR-PM₁ were 42%, 28%, 15%, 13% and 2% respectively. Six types of organic aerosols were identified:hydrocarbon like organic aerosol (HOA), cooking related organic aerosol (COA), biomass burning organic aerosol (BBOA), more oxidized organic aerosol (MO-OOA), less-oxidized oxygenated organic aerosol (LO-OOA) and aqueous-phase-processed oxygenated organic aerosol (aq-OOA), and their average concentrations accounted for 18%, 14%, 19%, 19%, 11% and 19% of the total organic aerosols, respectively. The results of comparing different pollution events show that the proportion of secondary aerosol will increase significantly during the pollution period, and the liquid phase reaction can significantly promote the formation of secondary components.

Key words： chemical composition of NR-PM₁ source analysis secondary aerosol pollution characteristics

Received: 12 January 2022

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X513

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	YE Nan
	MA yan
	JIANG You-lin
	ZHENG Jun

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YE Nan,MA yan,JIANG You-lin等. Chemical composition characteristics and source of non-refractory submicron aerosol in autumn and winter in the northern suburbs of Nanjing[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(8): 3591-3599.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I8/3591

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