2010 | OriginalPaper | Buchkapitel
Distribution Pattern, Sources and Potential Risks of Polycyclic Aromatic Hydrocarbons in Urban Soils of Fuzhou City, China
verfasst von : Jinzhi Ni, Xiaoyan Li, Juan Guo, Jun Wang, Hongyu Yang, Ran Wei
Erschienen in: Molecular Environmental Soil Science at the Interfaces in the Earth’s Critical Zone
Verlag: Springer Berlin Heidelberg
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Polycyclic aromatic hydrocarbons (PAHs) were analyzed in 64 surface soil (0∼5 cm depth) samples collected from Fuzhou city, China. The sampling sites were randomly selected from various functional zones including parks, colleges and universities, residential areas, agricultural fields, industrial areas, and gas stations. Total PAHs (ΣPAHs) concentrations ranged from 14.0 to 5442.9 μg·kg
−1
with a mean of 578.1 μg kg
−1
. The mean concentration of ΣPAHs in soil samples from different functional zones decreased in the order of gas stations (1140.9 μg·kg
−1
) > industrial areas (1131.6 μg·kg
−1
) > agricultural fields (514.3 μg·kg
−1
) > residential areas (393.3 μg·kg
−1
) > colleges and universities (245.8 μg·kg
−1
) > parks (222.0 g·kg-1). The calculated PAH isomer ratios indicated that pyrogenic origins such as motor vehicle exhaust, industrial activities and coal burning were the dominant sources. The total carcinogenic potency for each sampling site was calculated using toxicity equivalency factors (TEFs) to convert concentration of individual PAH to an equivalent concentration of benzo[a]pyrene (BaP
eq
). Comparing with the reference total carcinogenic potency calculated as a sum of Dutch target value for unpolluted soil with appropriate BaP
eq
, above 42% soil sampling sites in this study, especially for the sampling sites of gas stations, had certain potential ecological risks to human health.