Are unintentionally produced polychlorinated biphenyls the main source of polychlorinated biphenyl occurrence in soils?

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	Are unintentionally produced polychlorinated biphenyls the main source of polychlorinated biphenyl occurrence in soils?
	Wang, Chenchen; Song, Shuai; Xue, Jianfang; Lu, Yonglong; Li, Qifeng; Zhang, Hong; Cao, Xianghui
刊名	ENVIRONMENTAL POLLUTION
	2018-01-12
卷号	243 页码:492-500
关键词	Polychlorinated biphenyls Urban-to-rural spatial distribution Emission inventory Source identification Pollutant fate
ISSN号	0269-7491
文献子类	Article
英文摘要	The production of polychlorinated biphenyls (PCBs) has been banned globally for decades, but PCB concentrations in environmental media remain relatively high, especially in urban areas. Emissions estimates, studies of soil gradients between urban and rural areas, and quantitative identification of regional sources of PCBs in soils are necessary for understanding the environmental behavior of PCBs. In this study, regional PCB emissions were estimated at a resolution of 10 km x 10 km, and the spatial distribution of soil PCBs from urban to rural areas was studied along the Bohai and Yellow Sea regions. Compared with rural areas, mean PCB concentrations in urban soils (20.7 ng/g) were found to be higher, and concentrations decreased with distance from the city. Across both latitude and longitude directions, high PCB emissions in urban areas matched the distribution of total PCB concentrations in soils. The concentrations of the pollutants PCB28, PCB52, PCB101, PCB118, PCB138, PCB153, and PCB180 in soils originated from 5-year emissions, and accounted for 97%, 95%, 84%, 81%, 58%, 57%, and 27% of the total emissions, respectively. Unintentionally produced PCB (UP-PCB) emissions, which are mainly derived from cement (42%), pig iron (37%), crude steel (18%), and rolled steel (3%) industries, are the major contributors to PCBs in soils. Further identification of the sources and fates of PCBs requires a combination of field, laboratory, and modeling efforts. (C) 2018 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40465]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Wang, Chenchen,Song, Shuai,Xue, Jianfang,et al. Are unintentionally produced polychlorinated biphenyls the main source of polychlorinated biphenyl occurrence in soils?[J]. ENVIRONMENTAL POLLUTION,2018,243:492-500.
APA	Wang, Chenchen.,Song, Shuai.,Xue, Jianfang.,Lu, Yonglong.,Li, Qifeng.,...&Cao, Xianghui.(2018).Are unintentionally produced polychlorinated biphenyls the main source of polychlorinated biphenyl occurrence in soils?.ENVIRONMENTAL POLLUTION,243,492-500.
MLA	Wang, Chenchen,et al."Are unintentionally produced polychlorinated biphenyls the main source of polychlorinated biphenyl occurrence in soils?".ENVIRONMENTAL POLLUTION 243(2018):492-500.