State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
Environ Pollut. 2011 Mar;159(3):802-8. doi: 10.1016/j.envpol.2010.11.003. Epub 2010 Dec 14.
We studied the source, concentration, spatial distribution and health risk of 16 polycyclic aromatic hydrocarbons (PAHs) in urban soils of Beijing. The total mass concentration of 16 PAHs ranged from 93 to 13,141 μg kg(-1) with a mean of 1228 μg kg(-1). The contour map of soil PAH concentrations showed that the industrial zone, the historical Hutong district and the university district of Beijing have significantly higher concentrations than those in remainder of the city. The results of sources identification suggested that the primary sources of PAHs were vehicle exhaust and coal combustion and the secondary source was the atmospheric deposition of long-range transported PAHs. The incremental lifetime cancer risks (ILCRs) of exposing to PAHs in the urban soils of Beijing for adult were 1.77 × 10(-6) and 2.48 × 10(-5), respectively under normal and extreme conditions. For child, they were 8.87 × 10(-7) and 6.72 × 10(-6), respectively under normal and extreme conditions.
我们研究了北京市城市土壤中 16 种多环芳烃（PAHs）的来源、浓度、空间分布和健康风险。16 种多环芳烃的总质量浓度范围为 93 至 13,141μg/kg，平均值为 1228μg/kg。土壤多环芳烃浓度的等高线图显示，北京市的工业区、历史胡同区和大学区的浓度明显高于城市其他地区。来源识别结果表明，PAHs 的主要来源是汽车尾气和煤炭燃烧，次要来源是长距离传输 PAHs 的大气沉降。在正常和极端条件下，北京城市土壤中多环芳烃对成人的增量终生癌症风险（ILCRs）分别为 1.77×10(-6)和 2.48×10(-5)。对于儿童，分别为 8.87×10(-7)和 6.72×10(-6)。
