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PM10 samples were collected during winter and summer seasons at two different sites in the area of Trieste (Italy). The content of As, Cd, Cr, Mn, Ni, Pb and V in the PM10 samples was determined by inductively coupled plasma-mass spectrometry, with the purpose of evaluating the relevance of PM10 inhalation as a route of human exposure to these elements. The results showed that the ambient air concentration of the aforementioned elements were below the limits or target values for both sites and season. Site and season-specific correlation analysis was conducted for the identification of metals with similar origin: very good correlation for the couple Ni-V was found in both sites and seasons, showing the influence of combustion of heavy oils in PM10 composition. The inter-site and seasonal variability of both PM10 and metal concentrations were examined. A stronger impact by the vehicular traffic on the PM10 and metal concentrations was found for the urban site in both seasons. Because of the great importance of the “Bora” wind on the local climate, variability of PM10 and toxic elements concentration with wind were analysed, allowing determination of the effect of wind on dilution of the pollutants for the urban site during both seasons.

Toxic elements content in PM10 samples from a coastal area of the Northern Adriatic Sea