Emissions of gas- and particle-phase polycyclic aromatic hydrocarbons (PAHs) in the Shing Mun Tunnel, Hong Kong
作者： KF Ho , Steven Sai Hang Ho , SC Lee , Yan Cheng , Judith C Chow
DOI: 10.1016/J.ATMOSENV.2009.09.025
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摘要: Abstract Real-world vehicle emission factors for seventeen gas and particulate polycyclic aromatic hydrocarbons (PAHs) were quantified in the Shing Mun Tunnel, Hong Kong during summer winter 2003. Naphthalene, acenaphthylene, acenaphthene most abundant PAHs while fluoranthene pyrene particle phase. Most (98%) of consisted two- three-aromatic rings whereas particle-phase four- (∼60%) five-ring (∼17%) fresh exhaust emissions. Average gas- 950–2564 μg veh−1 km−1 22–354 μg veh−1 km−1, respectively. Good correlations found between diesel markers (fluoranthene pyrene; 0.85) gasoline (benzo[ghi]perylene indeno[1,2,3-cd]pyrene; 0.96). Higher PAH emission associated with a higher fraction diesel-fueled vehicles (DV) passing through tunnel. Separate determined from non-diesel by regression intercept method. The average PAH factor (i.e., sum phases) DV (3085 ± 1058 μg veh−1 km−1) was ∼5 times than that non-diesel-fueled (NDV, 566 ± 428 μg veh−1 km−1). Ratios to NDV high (>24); low (
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