In the last few years, an increasing number of epidemiological
studies was carried out in order to show the correlation between
the particulate matter (PM) and its negative health effects such as
cardiovascular and breathing problems (Kreyling et al., 2006). In
particular, toxicologists have paid attention on fine (PM2.5, particulate
matter with aerodynamic diameter less than 2.5 lm) and ultra-
fine particles (UFPs, i.e. particles sized about 100 nm in diameter or
less as defined by the International Organization for Standardization
through the ISO/TC 146/SC 2/WG1 N 320) (Pope, 2000; Hauser et al.,
2001), although in the scientific community there is no consensus
about the specific particle property having the worst effects on hucharacterize the emission sources as well as the evolution of particle
size distribution in the proximity of these emission points in order
to carry out aerosol source apportionment and exposure
assessment analysis in the areas characterized by high anthropogenic
pressure.