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Concentrations of polycyclic aromatic hydrocarbons (PAHs) were determined in the sediments from the main stream and the tributary of the Changjiang River. PAHs contents in the sediments from the Changjiang River ranged from 10.31 ng/g to 1239 ng/g, which were most likely related to human activities. Meanwhile, these results were lower than that of polluted area. PAH isomer ratios showed that PAHs were derived primarily from combustion, and minor amounts of PAHs are from direct input of petroleum.

Distribution of polycyclic aromatic hydrocarbons in sediments from the Changjiang River