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| Characteristics and sources of polycyclic aromatic hydrocarbons in surface soil from industrial areas of Baise, Guangxi. |
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Abstract To expand and improve the database of polycyclic aromatic hydrocarbon (PAH) pollution signatures in different environmental samples from sites in China, surface soil samples were collected from five industrial areas of Baise, a prefecture-level city of the Guangxi Zhuang Autonomous Region. The concentration and composition of 16 PAHs listed for prior control by the US EPA were determined using high performance liquid chromatography. Selected diagnostic ratios and principal component analysis were used to identify possible sources of soil PAHs. Concentrations of ∑16 PAHs in the present study were shown to vary greatly, and ranged from 18.7 to 6347 μg/kg, depending on the sampling location. The highest concentrations of Σ16 PAHs were observed in Power plant 2 soils with a value of 1923.4 μg/kg. Compared with domestic and foreign research, PAH pollution in the five Baise industrial areas reached medium to high levels. Soil PAH concentrations showed a strong Power plant 2–Power plant 1–Refinery–Lubricants plant–Cement plant gradient. Four- and five-ring PAHs, which have strong carcinogenic mutagenicity and distortion, dominated in the industrial areas with power plants and lubricant plants, while two- and three-ring PAHs dominated the surface soil near cement plants. Among the PAHs detected in the study-area soil, benz[a]anthracene (BaA), benzo[k]fluoranthene (BkF), chrysene (Chr), and fluoranthene (Fla) were the major pollutants occurring above standard levels. The study also suggested that the major sources of soil PAHs in Baise were coal and petroleum combustion (45.0%) and petroleum leakage (18.2%), or a combination of the two (36.8%).
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Received: 15 December 2013
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ZHANG Li, ZHANG Yuan, QI Shi-Hua, LI Hui, XING Xin-Li, ZHANG Ze-Zhou, ZHENG Huang, SUN Yan, MIN Yang. Characteristics of atmospheric PM2.5 and the variation of PAHs in PM2.5 during spring in Hongshan district, Wuhan[J]. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(8): 2319-2325. |
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