龙岩市区大气飘尘中多环芳烃污染现状的调查

Investigation and Analysis of Polycyclic Aromatic Hydrocarbons Pollution on Atmospheric Particles in Longyan City

采用恒能量同步荧光法研究了龙岩市区不同功能区冬、春季大气飘尘中多环芳烃(PAHs)的污染状况和污染来源,并对不同功能区的PAHs进行了污染评价。结果表明,龙岩市区各功能区大气飘尘中PAHs总量在278.95～718.13ng/m3,且冬季高于春季。根据荧蒽与芘质量浓度比值,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个功能区大气飘尘中PAHs的污染状况,冬季3个功能区苯并[a]芘浓度均超过国家标准(BaP,10ng/m3),且PAHs基本上均严重超标。

Pollution and source of polycyclic aromatic hydrocarbons （PAHs） in airbome particulate were studied using constant energy synchronous fluorescence spectrometry in different function regions in Longyan City, Fujian Province in winter and spring. Results indicated that total amount of PAHs in airborne particulate of different function regions ranged from 278.95- 718.13ng/m^3, with higher in winter than in spring. According to the ratio of fluoranthene to pyrene, PAHs pollution might be judged coming mainly from automobile emission and coal burning. Benzo[a] pyrene （BaP） and benzo[a] pyrene-equivalent carcinogenic concentration （BaPE） were used to evaluate PAHs pollution in 3 function regions, with concentration of BaP in winter higher than national air quality standard of 10ng/m^3 and PAHs beyond the standard.