黄河全流域岸边表层土壤中PAHs的分布、来源及风险评估

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Abstract

The contamination status of polycyclic aromatic hydrocarbons (PAHs) and the spatial distribution of ∑₂₅ PAHs and ∑_7carc PAHs were investigated based on 39 surface soil samples collected in May 2015 from the Yellow River Basin. The sources of PAHs were obtained by the isomer ratio method and principal component analysis method, and the health risk assessment of PAHs was evaluated by the BaP toxic equivalent and the excess lifetime risk model for cancer (ELCR). The results showed that the concentrations of mesenteric twenty-five PAHs in the surface soil ranged from 18.23 to 6805.49ng/g with an average value of 343.764ng/g; and the concentration of ∑₇ care PAHs ranged from 2.23 to 2796.34ng/g with an average value of 126.6ng/g. In general, the concentration of PAHs was higher in the middle and upper stream areas than in the downstream areas. In the majority of samples, we found that Ant/(Ant+Phe)<0.1, 0.2-6~10^-4, a level having potential health risks. While the value of ELCR in Xiangtang was higher at 10^-3, a level posting relatively high health risks.

Key words： Yellow River Basin polycyclic aromatic hydrocarbons source risk assessment

Received: 04 September 2018

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X53

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	Articles by authors
	LU Yin-tao
	WANG Xue-wen
	ZHANG Shi-chao
	PEI Jin
	XIANG Xin-xin
	XUE Hong-hui
	SUN Shao-bin
	YAO Hong

Cite this article:

LU Yin-tao,WANG Xue-wen,ZHANG Shi-chao等. Distribution, source and risk assessment of PAHs in surface soil of the Yellow River Basin[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(5): 2078-2085.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I5/2078

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