کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7698839 | 1496634 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
PAHs in the Northern South China Sea: Horizontal transport and downward export on the continental shelf
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: PAHs in the Northern South China Sea: Horizontal transport and downward export on the continental shelf PAHs in the Northern South China Sea: Horizontal transport and downward export on the continental shelf](/preview/png/7698839.png)
چکیده انگلیسی
To investigate horizontal transport and particulate export of semivolatile pollutants on the continental shelf or marginal sea, surface and depth water samples were collected across the northern South China Sea (SCS) and analyzed for polycyclic aromatic hydrocarbons (PAHs). The total concentrations of Σ15PAH in seawater were in the range of 1.6-14â¯ngâ¯Lâ1 (mean 5.5â¯ngâ¯Lâ1), and the offshore decreasing trend of PAHs revealed intense terrigenous transport on the continental shelf, which was originated from combustion activity. Vertically, PAHs in the particulate phase followed surface-enrichment and depth-depletion pattern with a concentration maximum (2.9â¯ngâ¯Lâ1) at the biomass maximum, while the dissolved PAH concentrations showed a minimum (1.5â¯ngâ¯Lâ1) at the same depth. Particulate export fluxes of PAHs were between 24 and 195â¯ngâ¯mâ2â¯dâ1 in the northern SCS based on 238U/234Th equilibria, which is suggested appropriate to quantify their downward flux in the upper water column. Efficient oceanic biological pump drives PAHs downward export to the deep ocean in the northern SCS.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Chemistry - Volume 202, 20 May 2018, Pages 121-129
Journal: Marine Chemistry - Volume 202, 20 May 2018, Pages 121-129
نویسندگان
Minggang Cai, Mengshan Duan, Jianqing Guo, Mengyang Liu, Anxiang Qi, Yan Lin, Junhua Liang,