DISTRIBUTION AND SOURCE IDENTIFICATION OF POLYCYCLIC AROMATIC HYDROCARBON OF SURFACE SEDIMENTS FROM THE CENTER PART OF BOHAI SEA, CHINA

13 surface sediment samples were collected from the center part of Bohai Sea for isomers analysis, methyl phenanthrene and quantitative analysis of GC-MS. Discussed are the characteristics of distribution and the input source and pollution levels in polycyclic aromatic hydrocarbons from the study area sediments. The concentrations of anthropogenic PAHs (ΣEPAPAHs) are 2.1 to 374.8ng/g, on an average of 33.1 ng/g, the concentrations showing a decreasing trend from the coastal area to deep sea, suggesting medium-low level pollution of the study area except for the high content of ΣEPAPAHs in the sediment samples from BG60. The 3 to 4 ring PAHs dominate the 5 to 6 ring PAHs. The anthropogenic PAHs are mainly derived from combustion, petroleum products and petrochemical rather than coal and wood combustion.The high content of phenanthrene and the four high maturity abnormal points indicale the existense of petroleum hydrocarbons PAHs pollution.