通过城市道路径流、灰尘、雨水和树冠穿透水对多环芳烃进行源诊断。
Source diagnostics of polycyclic aromatic hydrocarbons in urban road runoff, dust, rain and canopy throughfall.
作者信息
Zhang Wei, Zhang Shucai, Wan Chao, Yue Dapan, Ye Youbin, Wang Xuejun
机构信息
MOE Laboratory of Earth Surface Processes, College of Environmental Sciences, Peking University, Beijing 100871, PR China.
出版信息
Environ Pollut. 2008 Jun;153(3):594-601. doi: 10.1016/j.envpol.2007.09.004. Epub 2007 Oct 18.
Diagnostic ratios and multivariate analysis were utilized to apportion polycyclic aromatic hydrocarbon (PAH) sources for road runoff, road dust, rain and canopy throughfall based on samples collected in an urban area of Beijing, China. Three sampling sites representing vehicle lane, bicycle lane and branch road were selected. For road runoff and road dust, vehicular emission and coal combustion were identified as major sources, and the source contributions varied among the sampling sites. For rain, three principal components were apportioned representing coal/oil combustion (54%), vehicular emission (34%) and coking (12%). For canopy throughfall, vehicular emission (56%), coal combustion (30%) and oil combustion (14%) were identified as major sources. Overall, the PAH's source for road runoff mainly reflected that for road dust. Despite site-specific sources, the findings at the study area provided a general picture of PAHs sources for the road runoff system in urban area of Beijing.
基于在中国北京某城区采集的样本，利用诊断比值和多变量分析来确定道路径流、道路扬尘、雨水和树冠穿透水中多环芳烃（PAH）的来源。选择了代表机动车道、自行车道和支路的三个采样点。对于道路径流和道路扬尘，机动车排放和煤炭燃烧被确定为主要来源，且各采样点的源贡献有所不同。对于雨水，确定了三个主要成分，分别代表煤炭/石油燃烧（54%）、机动车排放（34%）和炼焦（12%）。对于树冠穿透水，机动车排放（56%）、煤炭燃烧（30%）和石油燃烧（14%）被确定为主要来源。总体而言，道路径流中PAH的来源主要反映了道路扬尘的来源。尽管存在特定地点的来源，但研究区域的结果提供了北京城区道路径流系统中PAHs来源的总体情况。
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