Temporal Trends and Spatial Variations of Polycyclic Aromatic Hydrocarbons in Atmospheric PM10 of Jinan, China

In order to investigate the distributions and characters of sixteen (U.S. EPA) polycyclic aromatic hydrocarbons (PAHs) in PK10, samples were collected from three districts in Jinan, P.R. China during 2004-2005 and 2008-2009. The total concentrations of 16 PAHs were 33.6-627.3 ng.m(-3) in 2004-2005 and 37.4-696.0 ng.m(-3) in 2008-2009. Annual variations were slight. A small increase of PAR level presented from 2004-2005 to 2008-2009, while four and five aromatic rings accounted for 70% of all PAHs. An obvious seasonal trend of PAH abundance was observed. The highest concentrations of PAHs were measured in winter. Benzo(k)fluoranthene (BkF, 4-ring) and fluoranthene (FluA, 5-ring) were the most abundant PAHs in winter. Spatial variations of PAHs were obviously impacted by local pollution sources. In non-heating seasons, the district had more industries and traffic presented the most PAHs; in heating seasons, the district that had higher population density appeared more contamination for the domestic heating.