银川市湖泊、河流沉积物中PAHs污染特征及风险评价

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Abstract

To understand the pollution status and ecological risk of polycyclic aromatic hydrocarbons (PAHs) in Yinchuan, a total of 17surface sediment samples were collected from lakes and urban rivers in Yinchuan City from April to May 2018. Gas chromatography-mass spectrometry (GC-MS) was used to detect the content of PAHs. The results showed that the total content of 16PAHs in sediment of lakes and urban rivers in Yinchuan City ranged between 767.35 and 3961.53ng/g with an average of 2129.86ng/g. Compared with the pollution status of PAHs in sediments at home and abroad, the pollution status of PAHs in Yinchuan was at a high level. Source analysis showed that the main source of PAHs in sediments in Yinchuan City were incomplete combustion of petroleum and coal. The method of effects range low (ERL) and effects range median (ERM) were used to evaluate the ecological risk of PAHs in sediments. The result showed the content of Phe in surface sediments of some sampling points exceed ERM. Sediment Quality Standards (SQSs) showed the contents of Nap and Ace were between the possible effect level (PEL) and the frequent effect level (FEL), and the content of Phe was higher than FEL. Risk quotient analysis showed that the risk quotient (RQ)of Acy, Ace, Phe, and Fla were higher than 1.0. The pollution of PAHs in sample sediments may cause ecological risks.

Key words： surface sediments polycyclic aromatic hydrocarbons pollution characteristics sources ecological risk

Received: 28 September 2018

PACS:

X524

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	Articles by authors
	DANG Li-hui
	DING Run-mei
	WANG Yi-fan
	YANG Hui-fang
	ZHANG Peng-ju
	TIAN Da-nian

Cite this article:

DANG Li-hui,DING Run-mei,WANG Yi-fan等. Pollution characteristics and risk assessment of PAHs in sediments of lakes and rivers in Yinchuan city[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(5): 2202-2209.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I5/2202

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