贵阳市道路灰尘中多环芳烃的分布特征及源解析

Distribution Characteristics and Source Apportionment of PAHs in Road Dust of Guiyang City

采用高效液相色谱法测定贵阳市道路地表灰尘中PAHs的含量,并对其分布特征及来源进行解析.结果表明,贵阳市道路地表灰尘中PAHs主要为化石燃料的燃烧所致,高环PAHs含量较高.工业区和重要交通干道的ΣPAHs含量最高,从园最低,在不同粒径道路地表灰尘中∑PAHs在630.3～1 870.1 μg/kg之间,∑PAHs均值为1 154.5 μg,/kg,∑PAHs浓度最大值及质量负荷率的最大值出现在粒径范围0.074～0.150mm灰尘样品中.

In this paper,16 of polycyclic aromatic hydrocarbons（PAHs） with different diameter road dust in Guiyang city were quantitatively analyzed by HPLC.Results indicate that the distribution characteristics and possible sources of PAHs in road dust from Guiyang urban area can be mainly attributed to the combustion of fossil fuel.For the distribution characteristics,higher concentration of PAHs were mainly in industrial areas and traffic arteries,while lower concentration PAHs were found in parks.Results also show that the total PAHs in dust is distributed in 630.3 to 1870.1 μg/kg range.The average of total PAHs concentration in dust was 1154.5 μg/ kg.The maximum concentrations and mass loading proportion of total PAHs are in diameter range of 0.074 ～ 0.150 mm road dust.