کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6335834 | 1620329 | 2016 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Size distribution of particle-phase sugar and nitrophenol tracers during severe urban haze episodes in Shanghai
ترجمه فارسی عنوان
توزیع اندازه ذرات فاز ذرات و ردیابهای نیتروفنول در حوادث شدید شهری در شانگهای
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کلمات کلیدی
شکر ها، نیتروفنل ها، توزیع اندازه، تقسیم بندی منبع، مهبان شهری، شانگهای،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
چکیده انگلیسی
In this study, measurements of size-resolved sugar and nitrophenol concentrations and their distributions during Shanghai haze episodes were performed. The primary goal was to track their possible source categories and investigate the contribution of biological and biomass burning aerosols to urban haze events through regional transport. The results showed that levoglucosan had the highest concentration (40-852 ng mâ3) followed by 4-nitrophenol (151-768 ng mâ3), sucrose (38-380 ng mâ3), 4-nitrocatechol (22-154 ng mâ3), and mannitol (5-160 ng mâ3). Size distributions exhibited over 90% of levoglucosan and 4-nitrocatechol to the total accumulated in the fine-particle size fraction (<2.1 μm), particularly in heavier haze periods. The back trajectories further supported the fact that levoglucosan was linked to biomass-burning particles, with higher values of associated with air masses passing from biomass burning areas (fire spots) before reaching Shanghai. Other primary saccharide and nitrophenol species showed an unusually large peak in the coarse-mode size fraction (>2.1 μm), which can be correlated with emissions from local sources (biological emission). Principal component analysis (PCA) and positive matrix factorization (PMF) revealed four probable sources (biomass burning: 28%, airborne pollen: 25%, fungal spores: 24%, and combustion emission: 23%) responsible for urban haze events. Taken together, these findings provide useful insight into size-resolved source apportionment analysis via molecular markers for urban haze pollution events in Shanghai.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 145, November 2016, Pages 115-127
Journal: Atmospheric Environment - Volume 145, November 2016, Pages 115-127
نویسندگان
Xiang Li, Li Jiang, Le Phuoc Hoa, Yan Lyu, Tingting Xu, Xin Yang, Yoshiteru Iinuma, Jianmin Chen, Hartmut Herrmann,