Pattern of polycyclic aromatic hydrocarbons (PAHs) pollution in communication air of Hangzhou, China

Nine PAHs were surveyed in communication air of Hangzhou. The results indicated that the PAHs pollution is very serious and the total sum of 9 PAHs, on the average are 3.39-13.82 μg/m 3. The PAHs signatures for all streets are similar to each other. Multivariate statistical techniques were used to investigate source apportionment for PAHs. A factor analysis/multiple regression model was successfully applied to the study. The most important three PAHs sources in communication air are diesel emission, gasoline engine emission, coal burning accounting for 61.1±6.4%, 19.9±8.3%, 10.8±10.8% of total PAHs, respectively. The relationship for three source tracers and total PAHs is: [PAHs] =1.471(±0.155)[Phen] + 2.538 (±2.522)[1-Mepy]+2.254 (±0.943)[Chry]+1.022 (±1.767).