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• W2034233400 abstract "Comparisons between concentration, size effect, molecular distribution, and toxicity of polycyclic aromatic hydrocarbons (PAHs) in urban road dust of Ulsan, Korea, were carried out. The road dust was collected at eleven representative urban sites offering unique road characteristics. The road dust was separated into four size categories as follows: 850–2000 μm, 180–850 μm, 75–180 μm and less than 75 μm. PAHs in the categorized road dust were ultrasonically extracted by a mixture of dichloromethane and n-hexane (1:1) for 30 min. Sixteen PAHs were specifically identified by a high performance liquid chromatography method. Pavement type, traffic volume, vehicle speed and surrounding environment of the study roads greatly affected the overall PAH road dust concentration. The molecular distribution of PAHs was strongly affected by vehicle type, surrounding area and pavement type of road. When the road dust particle size decreased, the total concentration of PAHs increased. The existence of coarse asphalt particles due to the abrasion of new asphalt pavement at some sites could increase the total PAH concentration to a size of 180–850 μm. PAHs in road dust were also evaluated for toxicity using the reported toxicity equivalency factors. The toxicity of PAHs in road dust showed a strong correlation to the total PAH concentration (r2 = 0.955). However, the coefficients of determination (r2) for the sizes of 850–2000 μm, 180–850 μm, 75–180 μm and less than 75 μm were 0.966, 0.998, 0.707 and 0.514, respectively." @default.
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• W2034233400 date "2010-03-01" @default.
• W2034233400 modified "2023-10-16" @default.
• W2034233400 title "Effects of road characteristics on distribution and toxicity of polycyclic aromatic hydrocarbons in urban road dust of Ulsan, Korea" @default.
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• W2034233400 doi "https://doi.org/10.1016/j.jhazmat.2009.10.039" @default.
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