Concentrations of atmospheric polycyclic aromatic hydrocarbons in particulate matter and the gaseous phase at roadside sites in Hanoi, Vietnam
We analyzed the concentrations of polycyclic aromatic hydrocarbons (PAHs) in both particulate matter (PM) and the gaseous phase at 10 roadside sites in Hanoi, Vietnam. The average concentrations of 47 PAHs (Σ47PAHs) were 63 ± 82 ng m-3 in PM and 480 ± 300 ng m-3 in the gaseous phase. The PAHs mainly originated from motorcycles without catalytic converters. The highest concentrations of Σ47PAHs in both PM and the gaseous phase were observed at a terminal for buses and trucks. The operation of large commercial vehicles led to increased PAH pollution at the terminal site. © 2008 Springer Science+Business Media, LLC.