【摘要】 对2003年广州严重灰霾期前后9d的大气样品进行了分析.结果表明,大气中颗粒物在积聚态颗粒物(0.32~1.80μm)和粗颗粒物(3.2~10.0μm)处有2个明显的峰;灰霾期积聚态颗粒物比粗颗粒物在TSP中占的比例高,而在灰霾结束后所占比例与粗颗粒物相当或略少;低环数多环芳烃在积聚态颗粒物段和粗颗粒物段各有一个峰,但主要分布在积聚态颗粒物中;高环数多环芳烃几乎完全分布在积聚态颗粒物中;从灰霾期至灰霾期后,低环数多环芳烃在积聚态颗粒物段的主峰粒径有逐渐减少的趋势,而对于高环数多环芳烃这一变化不大;比值TPAHs/TSP在灰霾期前后有较大的变化;由于比值BaP/BeP与TPAHs/TSP具有相同的变化趋势,降解作用可能是造成比值TPAHs/TSP变化的主要原因.更多还原

【Abstract】 The atmospheric samples of 9 days before and after the serious haze period in Guangzhou the year 2003 were analyzed. There were two obvious peaks in the places in the accumulation mode (0.32~1.80μm) and the coarse mode (3.2~10.0μm) atmospheric particles; during haze period, the proportion of accumulation mode particles in TSP was higher than that of coarse mode particles; but after haze the proportion occupied was about the same or lower a little; each of the low ring PAHs had a peak in these two places of particles; but distributed mainly in the accumulated mode particles; almost all of high ring PAHs distributed in the accumulated mode particles; from haze period to after haze period the particle diameter of lowing PAHs in the freak of accumulation mode tended to decrease gradually; but this change was small in high ring PAHs; the ratios of TPAHs/TSP changed more greatly before and after the haze period; the ratios of BaP/BeP had the same change trend with TPAHs/TSP degradation might be the main cause of this change.更多还原