阿克苏市大气颗粒物中多环芳烃的污染特征

Pollution Characteristics of Polycyclic Aromatic Hydrocarbons in Total Suspended Particles in Akesu City

利用气相色谱质谱法对阿克苏市春季和冬季大气TSP中16种多环芳烃进行分析，结果表明：阿克苏市大气TSP中不同环数PAHs春季呈现的规律为5环〉4环〉6环〉3环〉2环，冬季为4环〉5环〉6环〉3环〉2环：冬季大气TSP中苯并[a]芘的浓度是春季的7．65倍，冬季大气颗粒物中PAHs对人体健康危害风险高。通过特征比值法得出春季阿克苏市多环芳烃污染来源主要是机动车尾气，冬季阿克苏市多环芳烃污染来源主要是燃煤污染。

The composition of atmospheric 16 priority polycyclic aromatic hydrocarbons in total suspended particles （TSP） in winter and spring in Akesu City was analyzed using GC/MS technique. The results showed that the concentrations ofpolycyclic aromatic hydrocarbons （PAHs） with various rings in TSP were found in the order of 5 rings 〉 4 rings 〉 6 rings 〉 3 rings〉 2 rings in spring, and in the order of 4 rings 〉 5 rings 〉 6 rings 〉 3 rings 〉 2 rings in winter. The concentrations of PAHs in winter was 7.65 times as high as in spring and the risk of PAHs for human health was high in winter. The main source of atmospheric PAHs in TSP was vehicle emission in spring and coal burning emission in winter, according to the estimation by the ratio method.