摘要
目的研究多环芳烃(PAHs)在冬季和夏季不同粒径大气颗粒物上的分布。方法用DFJ鄄1型五段分级采样器采样,用GC鄄MS法测定,分析衡阳市区冬夏两季空气中PAHs在不同粒径颗粒物中的分布。结果在大气颗粒物分级样品中,均检出PAHs。PAHs在冬夏两季空气中的浓度分别为161.42、140.72ng/m3,在粒径≤2.0μm的细小颗粒上的含量分别占总量的63.3%与52.3%。结论衡阳市大气环境中PAHs的含量冬季明显高于夏季,冬季主要富集在粒径≤2.0μm的细小颗粒上,PAHs在不同粒径大气颗粒物上的分布不一致,夏季在粗细粒子中分布较为均匀,冬季PAHs的分布明显发生变化。
Objective To study the distribution of polycyclic aromatic hydrocarbons (PAHs)on different diameter atmospheric particulates in winter and summer respectively. Methods Atmospheric particulates in the atmosphere of Hengyang urban districts were collected using DFJ-1 model five-stage classification air sampler in the winter and summer. The contents of PAHs on different diameter atmosphere particulates were detected by GC-MS. Results The PAHs were found on different diameter atmosphere particles. The PAHs contents in the atmosphere in the winter and summer were 161.42?140.72 ng/m3. 52.3% and 63.3% PAHs distributed in the fine partioulates with dicameter ≤2.0 μm in the summer and winter. Conclusion The PAHs contents in the atmosphere during winter were higher than that during summer,and the PAHs were mainly distributed in the fine particulates with diameter≤2.0 μm. The distribution characteristics of different kinds of PAHs on different diameter atmospheric particulates were not unanimous. The distribution of PAHs in winter changed significantly.
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2004年第3期153-154,共2页
Journal of Environment and Health
关键词
大气污染
多环芳烃
大气颗粒物
Air pollution
Polycyclic aromatic hydrocarbons
Atmospheric particulate matters
