太原市大气颗粒物中多环芳烃的分布及污染源识别的研究

Study on Identifying the Distribution and Pollution Sources of PAHs in Airborne Particulate in Taiyuan

多环芳烃 (PAHs)具有致癌性 ,研究大气颗粒物中PAHs在不同功能区的分布、变化、来源具有重要意义。对太原市不同功能区大气颗粒物中有机物的研究表明 ,太原市大气颗粒物中含量较高的多环芳烃有 9种 ,且均不带取代基 ,平均浓度为 1 89 2ng/m3 ,Bap浓度平均为 74 7ng/m3 ,具体到各功能区浓度分布为 :一电厂化工区 >太钢工业区 >桃园三巷商业居民区 >太行仪表厂居民文化区。并利用各种指标判识来源 ,太原市的PAHs主要来源于煤等燃料的不完全燃烧。

Polycyclic Hydrocarbons(PAHs) were probably the most widely spread organic pollutant in environment and some PAHs exhibited carcinogenic effects to humans. The distribution and pollution sources of PAHs atmospheric particulate were investigated in Taiyuan. The results showed that the mean concentration of nine kinds of PAHs was 189 2 ng/ m 3,the mean concentration of BaP was 74 7 ng/ m 3. The concentration were changed with function zones, chemical industry zone>industrical zone>commercial and dwelling zone>cultural zone. The ratio could be used as identifications of sources and indicated the PAHs in the study was mainly formed the uncompleted combustion of coal and other fuel.