کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9451266 | 1307799 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A spatial temporal assessment of pollution from PCBs in China
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
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چکیده انگلیسی
This research represents an assessment of the current state of pollution from polychlorinated biphenyls (PCBs) in China. Various environmental media including sediment, water, organism and soil were analyzed and the spatial character of PCB pollution in each environmental medium was determined. On a national basis, PCB levels in all environmental media were relatively low, with little evidence of major contamination in China's main regions and rivers. However, there were some locations with high PCB concentrations. Sediments in Pearl River (83.1Â ng/g) and its estuary (58.9Â ng/g), Dalian Bay (58.1Â ng/g) and Songhua River (36.8Â ng/g) had relatively high level of PCBs. There were also some areas, which were mainly the industrial pollution sites or PCB equipment storage locations, remained seriously polluted with the highest PCB residue level of 150Â 000Â ng/g. In addition, Minjiang Estuary (985.2Â ng/g) and Taihu Lake (631Â ng/g) had high levels of water pollution, while Pearl Estuary (635.7Â ng/g) and Jiaozhou Bay (273.3Â ng/g) had relatively high PCB levels in organisms. PCB pollution in soil was limited to a few special pollution areas with the highest PCB level of 4.5448Â ÃÂ 106Â ng/g. Point source pollution was the common pattern of contamination, influenced primarily by local geographic, economic and historical factors. Analysis of PCB concentrations from the 1980s to 1990s shows an increasing trend, possibly due to the improper disposal of and leakage from PCB containers, chemical transfers, and the general rise of industrial pollution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 60, Issue 6, August 2005, Pages 731-739
Journal: Chemosphere - Volume 60, Issue 6, August 2005, Pages 731-739
نویسندگان
Ying Xing, Yonglong Lu, Richard W. Dawson, Yajuan Shi, Hong Zhang, Tieyu Wang, Wenbin Liu, Hongchang Ren,