کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6314726 | 1619155 | 2016 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evolution of secondary inorganic and organic aerosols during transport: A case study at a regional receptor site
ترجمه فارسی عنوان
تکامل آئروسل های غیر آلی و آلی در طول حمل و نقل: مطالعه موردی در یک سایت گیرنده منطقه ای
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کلمات کلیدی
انتشار شهری، حمل و نقل آلاینده، شکل گیری ثانویه، تکامل آئروسلهای جوی،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
Understanding the evolution of aerosols in the atmosphere is of great importance for improving air quality and reducing aerosol-related uncertainties in global climate simulations. Here, a unique haze episode at a regional receptor site near the East China Sea was examined as a case study of the aging process of atmospheric aerosols during transport. An increase in photochemical age from 5Â h to more than 25Â h and a progressive increase in the fitted mean particle diameter from 70Â nm to approximately 300Â nm were observed. According to the pollution features and meteorology conditions involved, pollution accumulation (PA), sea breeze (SB), and land breeze (LB) periods were identified. Concentrations of black carbon (BC), hydrocarbon-like organic aerosols (HOA), semi-volatile oxidized organic aerosols (SV-OOA), and nitrate increased by 7-fold up to 39-fold when the air masses passed through Taizhou, a nearby city. In addition, nitrate and SV-OOA dominated the aerosol composition in the urban outflow plumes (52% and 18%, respectively), yet they gradually decreased in concentration during transport. In contrast, sulfate and the low-volatile oxidized organic aerosols (LV-OOA) exhibited more regional footprints and potentially have similar formation mechanisms. The atomic oxygen-to-carbon (O/C) ratio also increased from 0.45 to 0.9, thereby suggesting that rapid formation of highly oxidized secondary organic aerosols (SOA) occurred during transport. Overall, these results provide valuable insight into the evolution of the chemical and physical features of aerosol pollution during transport and also highlight the need for regulatory controls of nitrogen oxides, sulfur dioxide, and VOCs to improve air quality on different scales.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 218, November 2016, Pages 794-803
Journal: Environmental Pollution - Volume 218, November 2016, Pages 794-803
نویسندگان
Jianfei Peng, Min Hu, Zhaoheng Gong, Xudong Tian, Ming Wang, Jing Zheng, Qingfeng Guo, Wei Cao, Wei Lv, Weiwei Hu, Zhijun Wu, Song Guo,