南京市大气可吸入颗粒物中多环芳烃的分布状况

Investigation of Polycyclic Aromatic Hydrocarbons' Distribution in Atmospheric PM10 in Nanjing City

采集南京市大厂和山西路两地区四季度大气PM10样品,用索氏提取-高效液相色谱技术分析其多环芳烃组成及含量,结果表明,两地区多环芳烃总量在42.561ng/m3～121.890ng/m3之间,大厂区浓度明显高于山西路地区,是山西路地区的1.169～2.628倍。大厂地区PAHs总量受季节影响不大,山西路地区浓度与季节呈一定的相关性,即春季>冬季>夏季>秋季,两地区PAHs中蒽、荧蒽、苯并[b]荧蒽、苯并[g,h,i]苝含量相对都较高,表明燃煤和交通是南京市的主要污染源,大厂区燃煤污染更为明显。

This investigation involved 4-seasonal sampling of air-borne PM10 in downtown area and industrial area respectively,and analysis of polycyclic aromatic hydrocarbons (PAHs) concentration in PM10 using Soxhlet extraction-HPLC techniques. The investigation reveals that air pollutants from both coal combustion and traffic vehicles constitutes the predominant source of PAHs.