韶关市大气颗粒物多环芳烃的污染特征研究

采集韶关市PM10和PM2.5样品,采用气相色谱-质谱法测定了16种PAHs的质量浓度,分析了16种PAHs在PM2.5中的时空分布特征,研究16种PAHs在PM10和PM2.5中分布的差异.结果显示:PAHs在PM2.5中的季节性分布具有冬、夏季高,春、秋季低的特点,且苯并a]蒽、苯并k]荧蒽、苯并c]芘、苯并a]芘、荧蒽等在一年四季含量均较高;在空间上的分布显示交通区>工业区>商业区>居民区>休闲区.PAHs在PM2.5中的分布明显高于在PM10中的分布,在人为活动较为频繁的季节和区域,PAHs的含量明显增加.

Pollution Characteristics of Polycyclic AromaticHydrocarbons in Atmospheric Particulates in Shaoguan City

The sample of PM10 and PM2.5 were collected in Shaoguan city.GC/MS technique was used to analysis mass concentration of 16 kinds PAHs, and spatial and temporal distribution characteristics of 16 kinds PAHs were study in PM2.5, and their distributional difference between PM10 and PM2.5.The result show that PAHs have higher content in Winter or Summer, and low content in spring or autumn, but anthracene(BaA), benzo k fluoranthene, Benzoc]pyrene and benzopyrene have higher content throughout the year.Spatial distribution characteristics for 16 kinds PAHs in PM2.5 is traffic area> Industrial district > commercial area > residential area> leisure area.The distribution of PAHs in PM2.5 is significantly higher than in the distribution of PM10, the content of PAHs increased significantly In human activities more frequent season and area.