珠江三角洲地区大气中多环芳烃的被动采样观测

研究了珠江三角洲地区大气中多环芳烃的含量与分布.利用大气被动采样装置，在包括香港在内的珠江三角洲地区共设立了21个大气被动采样点，样品采集时间为2005-08-15—10-14.结果表明，除主要存在于气相中的2～3环PAHs与部分4环PAHs外，聚氨酯泡沫材料(PUF)被动采样器也可在一定程度上采集大气颗粒物中的5～7环PAHs.珠江三角洲地区大气PAHs的含量与组成存在较大差异，珠江三角洲内地采样点PAHs的含量远远高于香港采样点，这主要是受采样点所处的地理位置、气候条件以及能源消费结构的影响.初步研究表明，PUF大气被动采样器可较好地运用于区域大气PAHs污染分布与特征对比研究. 

Monitoring of Polycyclic Aromatic Hydrocarbons in the Atmosphere of the Pearl River Delta Using PUF-Passive Air Sampler

The residues and distribution of polycyclic aromatic hydrocarbons (PAHs) in the atmosphere from the Pearl River Delta were studied. Sampling was conducted at the same time at twenty-one passive sampling sites for consecutive days from August 15, 2005 to October 14, 2005. The results show that PUF-passive air sampler (PUF-PAS) may not only absorb 2～3-ring PAHs and part of 4-ring PAHs, which mainly exist in vapor phases, but is also able to retain 5～7-ring PAHs mostly associated with atmospheric particulates. There exists big difference in the concentrations and components of PAHs in the atmosphere over different areas of the Pearl River Delta, with PAHs concentrations at sampling sites in the mainland part far higher than those in Hong Kong. This is mainly influenced by geographicallocation, climate and energy consumption patterns. The results demonstrated that PUF-PAS technique can be used in the comparative study on the distribution and characteristics of PAHs in the atmosphere at a regional scale.