不同高程气溶胶中多环芳烃(PAHs)分布研究

Study on distributions of polycyclic aromatic hydrocarbons(PAHs) in aerosols at different levels

通过对在广东省南海市不同高程气溶胶及气溶胶中多环芳烃 (PAHs)的分布研究认为 ,气溶胶及气溶胶中的PAHs来源于地表主干道机动车的排放 ,优控多环芳烃总量在 3次连续采样中可能由于空气流动状态的差异产生 3种不同的组合类型 .研究中发现 ,部分PAHs的分布出现异常 ,即采样位置高的样品PAHs中轻质量、低环数的多环芳烃含量的高于采样位置低的样品的无序现象 .

By studying on distributions of PAHs in aerosols at different levels in Nanhai City,Guangdong province,it is suggested that vehicle emission in truck road is the source of aerosols and polycylic hydrocarbons (PAHs) in aerosols.The anomalous distribution or disordered phenomenon of partial PAHs was found,i.e.,the concentrations of PAHs with lighter mass and lesser rings,sampled from higher locations were greater than those from lower locations.