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| Concentrations and sources of soil PAHs in various functional zones of Fuzhou City |
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Abstract Polycyclic aromatic hydrocarbons (PAHs) were analyzed in 50 soil samples collected from various functional zones including gas stations, industrial areas, cultural and educational areas, parks and residential areas in Fuzhou City. Meanwhile, the PAHs pollution was evaluated and the sources of soil PAHs in various functional zones were analyzed by using factor analysis/multiple linear regression method. The results showed that the average concentration of total PAHs was 595.9 μg/kg in surface soil samples of Fuzhou City, which was a moderate level in cities at home and abroad and indicated a mild level of PAHs pollution. The major source of PAHs in surface soils was the combustion of fossil fuel, in which the proportion of coal combustion and oil combustion were 63% and 47%, respectively. The soils of all the functional zones had a certain degree of PAHs pollution and the total PAHs concentrations were in the order of gas stations > industrial areas > residential areas > cultural and educational areas > parks. Though the soil PAH sources of various functional zones were different, all of the main sources of them were the combustion of fossil fuel.
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Received: 24 August 2011
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