Gas-particle concentration and distribution of n-alkanes and polycyclic aromatic hydrocarbons in the atmosphere of Prato (Italy)

作者：Cincinelli Alessandra^*; Del Bubba Massimo; Martellini Tania; Gambaro Andrea; Lepri Luciano

来源：Chemosphere, 2007, 68(3): 472-478.

DOI：10.1016/j.chemosphere.2006.12.089

• PAH
• n-alkanes
• urban air
• gas-particle partitioning
• source apportionment

Air samples were collected in an urban and industrialised area of Prato (Italy) during 2002, as part of a study to identify and measure aliphatic hydrocarbons and polycyclic aromatic hydrocarbons (PAHs). Total concentrations of aliphatic hydrocarbons ranged between 170 and 282 ng m(-3) in the gas phase and from 48.9 to 276 ng m(-3) in the particulate phase. The average total PAH concentrations (gas + particulate) were 59.4 +/- 26.5 ng m(-3), and both gas and particulate phase PAH concentrations decreased with increasing temperature. Source identification using diagnostic ratios and principal component analysis identified automobile traffic, in particular, the strong influence of diesel fuel burning, as the major PAH source. Gas-particle partition coefficients (K-p's) of n-alkane and PAHs were well correlated with the sub-cooled liquid vapour pressure (P-L(0)) and indicate stronger sorption of PAHs to aerosol particles compared with n-alkanes.

• 出版日期2007-6