广东省南海市主干道气溶胶中多环芳烃(PAHs)的研究

Study on organic pollution of aerosols at main road in Nanhai City, Guangdong Province

气溶胶采样点位于广东省南海市桂江路边缘及两侧 ,采集时间为 2 4 h,连续采集三天。使用仪器为国产大体积采样器。同时在公园内设点采样 ,以作背景研究。样品经超声波抽提和层析柱分离得到正构烷烃、芳烃 (AHs)和极性组分等三种有机组分。对 PAHs进行 GC MS分析 ,气溶胶中具有较高含量的芴、菲、蒽、荧蒽、芘、苯并 [a]蒽、、苯并 [b]荧蒽、苯并 [k]荧蒽、苯并 [a]芘、茚并 [1 ,2 ,3-cd]芘、二苯并 [a,h]蒽、苯并 [g,h,i]等。通过 TSP研究认为 ,主干道的机动车排放和扬尘是气溶胶的主要来源 ,气候改变也是 TSP变化的另一重要因素。

Aerosols sampling points lay beside Guijiang Road and at its two sides in Nanhai City, Guangdong Province High Volume air samplers were used and consecutive 24h sampling were taken for three days Simultaneously, background samples were taken at park The samples were extracted using ultrasonic agitation and three groups, alkanes, aromatic hydrocarbons (AHs) and polar fraction, were separated by layer chromatographic column There were high concentrations of fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo[a]anthrancene, chrysene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, indeno[1,2,3 cd]pyrene, Dibenzo[a,h]anthracene and benzo[g,h,i]perylene in aerosols by analysis PAHs using GC MS It is suggested that aerosols mainly come from vehicle exhausts and fly dust of main road, and TSP can be changed with climate by studing TSP