龙岩大气颗粒物中多环芳烃源识别及污染评价

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

采用恒能量同步荧光法,研究了龙岩市区不同功能区冬、春季大气颗粒物中多环芳烃（PAHs）的污染状况和污染来源,并对不同功能区的PAHs含量进行了评价.结果表明：龙岩市区各功能区大气颗粒物中ρ（PAHs）为278.95～718.25 ng/m^3,且冬季高于春季.根据PAHs中一些特征标志物的比值,可判断冬、春季市区内PAHs主要来源于汽车尾气和燃煤污染.采用苯并[a]芘（BaP）及苯并[a]芘等效致癌浓度（BaPE）来评价3个功能区大气颗粒物中PAHs的污染状况显示,冬季3个功能区苯并[a]芘含量（ρ（BaP））均超过国家标准（10 ng/m^3）,且ρ（PAHs）均严重超标.

The pollution state and source of polycyclic aromatic hydrocarbons （PAHs） in airborne particulate were studied using constantenergy 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 p（PAHs） in the airborne particulate ranged from 278.95 to 718.25 ng/ms 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.