芜湖市交通区表层土壤多环芳烃与黑碳研究

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Abstract Concentrations of 26 polycyclic aromatic hydrocarbons(PAHs) including EPA 16 priority PAHs were determined in forty surface soils from traffic areas and control green spaces in Wuhu, China. Black carbon (BC) was also quantified by both methods of chemical oxidation (dichromate, BC_Cr) and chemo-thermal oxidation (CTO-375, BC_CTO). The distribution characteristics, affected areas of, and relationship between PAHs and BC were discussed. Besides, the sources of PAHs in the soil were analyzed by using the compositional analysis positional analysis, methyl phenanthrene index, and positive matrix factorization (PMF) model. The results showed that concentrations of PAHs, BC_Cr and BC_CTOranged from 0.075 to 28.76μg/g, 3.78 to 27.13g/kg, and 1.07 to 10.36g/kg, respectively. Concentrations of PAHs and BCs in the soil decreased with the distance from the road. There existed a clear trend in concentrations of PAHs and BCs:important traffic nodes≈intersections > main roads≈feeder roads > greenbelts. The traffic flow was not the dominated factor for the concentrations in the traffic areas, while the running state of the vehicle was the key factor. 4~6 rings PAHs, as expected, dominated in surface soil of traffic areas. Concentrations of PAHs in the surface soil of traffic area were significantly correlated with BC_Cr and BC_CTO rather than TOC, and those in the surface soil of greenbelts had no significant correlation with TOC, BC_Cr and BC_CTO. It was showed that BC had an important influence on the accumulation of PAHs in the soil, but was interfered by other factors. In addition, the PAHs in the soil samples mainly originated from the transportation source.

Key words： Wuhu traffic area surface soil PAHs black carbon source apportionment

Received: 23 November 2017

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Corresponding Authors: 汪青,副教授,ahnuwq@mail.ahnu.edu.cn E-mail: ahnuwq@mail.ahnu.edu.cn

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	HUA De-wu
	WANG Qing
	XU Hong
	DONG Xiao-ning
	SU Chen

Cite this article:

HUA De-wu,WANG Qing,XU Hong等. Polycyclic aromatic hydrocarbons and black carbon in surface soil from traffic areas in Wuhu, China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2253-2263.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I6/2253

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