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篇目详细内容

【篇名】 Characterization of submicron aerosols in the urban outflow of the central Pearl River Delta region of China
【刊名】 Frontiers of Environmental Science and Engineering
【刊名缩写】 Front.Environ.Sci.Eng.
【ISSN】 2095-2201
【EISSN】 2095-221X
【DOI】 10.1007/s11783-012-0441-8
【出版社】 Higher Education Press and Springer-Verlag Berlin Heidelberg
【出版年】 2012
【卷期】 6 卷5期
【页码】 725-733 页,共 9 页
【作者】 Zhaoheng GONG; Zijuan LAN; Lian XUE; Liwu ZENG; Lingyan HE; Xiaofeng HUANG;
【关键词】 organic aerosol; high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS); positive matrix factorization

【摘要】
Submicron aerosol particles (with aerodynamic diameters less than 1?μm, PM1) were sampled and measured in Heshan, an urban outflow site of Guangzhou megacity in Pearl River Delta in South China, using an Aerodyne High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) in November 2010 during 2010 Guangzhou Asian Games. The mean PM1 mass concentration measured was 47.9±17.0?μg·m?3 during the campaign, with organic aerosol (OA) and sulfate being the two dominant species, accounting for 36.3% and 20.9% of the total mass, respectively, followed by black carbon (17.1%, measured by an aethalometer), nitrate (12.9%), ammonium (9.6%) and chloride (3.1%). The average size distributions of the species (except black carbon) were dominated by an accumulation mode peaking at ~550?nm. Calculations based on high-resolution organic mass spectrum showed that, C, H, O and N on average contributed 58.1%, 7.3%, 30.7%, and 3.9% to the total organic mass, respectively. The average ratio of organic mass over organic carbon mass (OM/OC) was 1.73±0.08. Four components of OA were identified by the Positive Matrix Factorization (PMF) analysis, including a hydrocarbon-like (HOA), a biomass burning (BBOA) and two oxygenated (SV-OOA and LV-OOA) organic aerosol components, which on average accounted for 18.0%, 14.3%, 28.8% and 38.9% of the total organic mass, respectively.
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