کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8864000 | 1620296 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Seasonal atmospheric deposition and air-sea gas exchange of polycyclic aromatic hydrocarbons over the Yangtze River Estuary, East China Sea: Implications for source-sink processes
ترجمه فارسی عنوان
رسوب فصلی اتمسفر و مبادله گاز دریایی هوا و دریا از هیدروکربن های آروماتیک چند حلقه ای در رودخانه یانگ تسه، دریای شرق چین: پیامدهای برای فرآیندهای منبع سینک
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
چکیده انگلیسی
In this work, air samples and surface seawater samples covering four seasons from March 2014 to January 2015 were collected from a background receptor site in the YRE to explore the seasonal fluxes of air-sea gas exchange and dry and wet deposition of 15 polycyclic aromatic hydrocarbons (PAHs) and their source-sink processes at the air-sea interface. The average dry and wet deposition fluxes of 15 PAHs were estimated as 879â¯Â±â¯1393â¯ngâ¯mâ2 dâ1 and 755â¯Â±â¯545â¯ngâ¯mâ2 dâ1, respectively. Gaseous PAH release from seawater to the atmosphere averaged 3114â¯Â±â¯1999â¯ngâ¯mâ2 dâ1 in a year round. The air-sea gas exchange of PAHs was the dominant process at the air-sea interface in the YRE as the magnitude of volatilization flux of PAHs exceeded that of total dry and wet deposition. The gas PAH exchange flux was dominated by three-ring PAHs, with the highest value in summer and lowest in winter, indicating a marked seasonal variation owing to differences in Henry's law constants associated with temperature, as well as wind speed and gaseous-dissolved gradient among seasons. Based on the simplified mass balance estimation, a net 11 tons yâ1 of PAHs (mainly three-ring PAHs) were volatilized from seawater to the atmosphere in a â¼20,000â¯km2 area in the YRE. Other than the year-round Yangtze River input and ocean ship emissions, the selective release of low-molecular-weight PAHs from bottom sediments in winter due to resuspension triggered by the East Asian winter monsoon is another potential source of PAHs. This work suggests that the source-sink processes of PAHs at the air-sea interface in the YRE play a crucial role in regional cycling of PAHs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 178, April 2018, Pages 31-40
Journal: Atmospheric Environment - Volume 178, April 2018, Pages 31-40
نویسندگان
Yuqing Jiang, Tian Lin, Zilan Wu, Yuanyuan Li, Zhongxia Li, Zhigang Guo, Xiaohong Yao,