“奎独乌”区域冬季大气PM2.5中多环芳烃污染特征分析

Analysis on the Pollution Characteristics of Polycyclic Aromatic Hydrocarbons in Winter Atmospheric PM2.5 in“Kuiduwu”Region

通过手工采样的方法采集了2013年冬季“奎独乌”区域大气PM2.5样品,并对其中PAHs分布及变化特征进行了分析。得出结论:由本次监测数据得到的浓度含量与同期国内其他城市相比呈现较低水平,总质量浓度2#生活区>4#工业区>3#工业区>1#生活区;由于冬季采暖期大量燃煤造成该区域4-6环PAHs所占的质量百分比最大。Ind/BghiP比值和Flu/Pyr比值法分析得出,“奎独乌”区域冬季大气颗粒物中的多环芳烃主要来自柴油和燃煤燃烧。

Atmospheric PM2.5 samples were collected from the“Kuiduwu”region in the winter of 2013 by manual sampling,and the distribution and change characteristics of PAHs were analyzed.It is concluded that the concentration obtained from this monitoring data is lower than that of other domestic cities in the same period.The total mass concentration is ranked as follow:2#>4#>3#>1#;The mass percentage of 4-6 ring PAHs in this area is the largest due to the large amount of coal burning during the winter heating period.The analysis of Ind/BghiP ratio and Flu/Pyr ratio showed that the PAHs in the atmospheric particles in the“Kuiduwu”region mainly came from the combustion of diesel and coal-fired fuel.