Title: Distribution,sources and ecological risk assessment of polycyclic aromatic hydrocarbons in agricultural soils from a typical contaminated area
Abstract: The concentrations of 16 US EPA PAHs in agricultural soils from Luqiao were analyzed by isotope dilution GC/MS,and their distribution,sources and ecological risk were investigated.Each of the 16 PAHs was detected in all of the soil samples.The total concentrations of PAHs in the soils ranged from 52.3 to 991 μg·kg-1,which correlated significantly with soil organic carbon content(p 0.01).The PAH constituents indicated that high molecular weight PAHs were dominant in Luqiao soils.The good correlation(r 0.7,p 0.01)among PAH components(except Nap,Acy and Fl)indicated that the PAHs in the sampling area may have similar origins.The isomer ratios and factor analysis revealed that the PAHs in the Luqiao agricultural soils originated mainly from coal and biomass combustion.The toxic benzo[a]pyrene equivalents(TEQBaP)of the 16 PAHs ranged from 4.61 to 164 μg·kg-1,99% of which was contributed by 7 carcinogenic PAHs.The total TEQBaP of 10 PAHs with target value in 35% of the soil samples exceeded the Dutch target reference value,suggesting that some agricultural soils in Luqiao may have potential ecological risk.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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