【摘要】 对北京石景山地区大气中有机质浓度、各族组成及其饱和烃、多环芳烃的组成和分布特征进行了分析。大气中共检测出 40多种多环芳烃 ,其中很多属于美国国家环保局 (EPA)优先控制污染物 ,以及具有致癌和怀疑有致癌性的多环芳烃。其主要来源于煤的不完全燃烧 ,也有相当部分来源于汽车尾气的排放。其中煤比石油所造成的污染更为严重。更多还原

【Abstract】 The density of the organic matter, the composition of each group constituent, the composition and distribution characteristics of the saturated hydrocarbons and PAHs in the air-borne dusts in Beijing municipality are analyzed. There are more than 40 kinds of PAHs in the air-borne dusts, most of which are precedence-controlled pollutants set by US EPA. Many PAHs are carcinogenic or are suspected to be carcinogenic. They mainly come from the incomplete combustion of the fossil fuel, such as coal and petroleum, and the plant.The coal can cause more grave pollution than the petroleum during the incomplete combustion.更多还原