兰州市大气飘尘中多环芳烃分布及来源判识

Identifying the Distribution and Pollution Sources of PAH in Airborn Particulat in Lanzhou

用 GC- MS定量和半定量分析了 PAH组分 ,研究区大气飘尘中检测出 1 6种母核PAH.PAH的质量浓度随功能区和季节的变化而不同 ,冬季 PAH质量浓度高于夏季 ;PAH污染程度依次为 :化工区 >居民区 >交通区 >郊区。根据荧蒽与芘质量浓度比值判别市区内

Polycyclic aromatic hydrocarbon (PAH) fractions in airborn particulates were quantitatively and semi quantitatively analyzed by GC MS.16 kinds of parent PAH were detected in airborn particulates.Quantity of PAH is changed with function zones and the seasons,its concentrations in airborn particulates in winter were higher than in summer,and in chemical industry zone>in commercial zone>in traffic zone>in suburb zone.The ratio of fluoramthene to pyrene may indicate that PAH in the area was mainly from uncompleted combustion.