Distribution and Numerical Prediction of Polycyclic Aromatic Hydrocarbons (PAHs) on Atmospheric Particles in Jinan, China

摘要

16 EPA-priority PAHs on ambient airborne particles with different diameters were measured at 7 urban sites in Jinan during heating and non-heating periods to characterize their distribution and pollution levels. The concentrations of 16 paniculate PAHs were between 7.56 and 800 ng-nf3 with an average of 308 ngm-3. PAHs on atmospheric particles were dominated by 4-to 6-ring components and exhibited pronounced spatial distribution, temporal variation and size distribution. The emission strength and meteorological conditions were the most important factors affecting these trends. Furthermore, a numerical prediction model was proposed to forecast and prevent PAHs air pollution in Jinan. The coincidence between predicted and measured concentrations of PAHs demonstrated the good capability of this prediction model system.