J. Phys. IV France 107 (2003) 259
Trace metals in the aerosol of the Logoon of VeniceG. Capodaglio1, 2, A. Gambaro11, 2, A. Varga1, G. Barbante1, 2 and P. Cescon1, 2
1 Dipartimento di Scienze Ambientali, Università Ca' Foscari di Venezia, Italy
2 Istituto per la Dinamica dei Processi Ambientali - CNR, Venezia, Italy
Measurements of metal concentrations in the aerosols were carried out to highlight the importance of this contribution to contamination of the lagoon of Venice, Aerosol samples were collected by high-volume impactors fitted with PM 10 size selective inlets. Particles with aerodynamic diameters 10 m were classified into six size intervals with cutoff aerodynamic diameters of 7.2, 3, 1.5, 0.95, 0.49 an 0.49 m. Samples were collected at four stations selecting the wind speed and the direction to characterise aerosols derived from the principal contaminant sources of the Venice Lagoon. Aerosol samples were analysed by ICP-SF-MS to determine the concentration of Li, Pb, U, Cd, Al, V, Mn, Fe, Cu, Zn and Co. The preliminary results obtained show that the elements with clear anthropogenic origin (in particular, V and Pb) had a higher concentration in the fine fraction of aerosol, while other elements such as Mn and Fe showed higher concentrations at all sites with a bimodal distribution due to the crustal origin of these elements. On the basis of granulometric distribution of metals for the four sampling sites we can hypothesize that long range transport of contaminants can significantly contribute to the pollution of the Lagoon of Venice.
© EDP Sciences 2003