Source Identification and Pollution Evaluation of Polycyclic Aromatic Hydrocarbons in Airborne Particulate

The pollution state and source of polycyclic aromatic hydrocarbons(PAHs) in airborne particulate were studied using constant-energy synchronous fluorescence spectrometry technique in different function regions in Longyan City in winter and spring,and the pollution evaluation of PAHs in different function regions was made.The total(ρ(PAHs)) in the airborne particulate ranged from(278.95) to(718.25)(ng/m~3) in different function regions of Longyan City,and was higher in winter than in spring.Based on some diagnostic index ratios of PAHs,the PAHs pollution of each function region mainly comes from automobile emission and coal burning pollution in winter and spring.The benzo[a]pyrene(BaP) and benzo[a]pyrene-equivalent carcinogenic concentration(BaPE) was adopted to evaluate the PAHs pollution state in the airborne particulate of 3 function regions.It was shown that the mass concentration of BaP of 3 function regions in winter was higher than the national air quality standard(10(ng/m~3)),while the PAHs of each function region in winter were basically in serious excess of standard.