title: Source diagnostics of polycyclic aromatic hydrocarbons in urban road runoff, dust, rain and canopy throughfall.
abstract: 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.
authors.affiliation: MOE Laboratory of Earth Surface Processes, College of Environmental Sciences, Peking University, Beijing 100871, PR China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Shucai
authors.initials: S
authors.lastname: Zhang
authors.forename: Chao
authors.initials: C
authors.lastname: Wan
authors.forename: Dapan
authors.initials: D
authors.lastname: Yue
authors.forename: Youbin
authors.initials: Y
authors.lastname: Ye
authors.forename: Xuejun
authors.initials: X
authors.lastname: Wang
mesh_terms: D002681:China; D002947:Cities; D003031:Coal; D004391:Dust; D004784:Environmental Monitoring / Q000379:methods*; D004785:Environmental Pollutants / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D015233:Models, Statistical; D010316:Particle Size; D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D011891:Rain; D001335:Vehicle Emissions; D014872:Water Movements
chemical_list: D003031:Coal; D004391:Dust; D004785:Environmental Pollutants; D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons; D001335:Vehicle Emissions