MAPPING OF AEROSOLS ELEMENTAL DISTRIBUTION IN 2 ZONES IN ROMANIA BY PIXE ANALYSIS

In the summer of 1994 aerosol particles were collected from different places, using a portable stacked filter unit, with filters of 8 and 0. 4 mu m. Sampling was performed in order to obtain the spatial distribu tion of elemental concentrations of aerosols. The Van de Graaff machin e in Nagoya University was used for PIXE analysis of the samples. Resu lts were processed both in Bucharest and in Nagoya, Iso-level maps for the concentration of each of the interesting elements were drawn, Cor relation was made between the industry, vegetation, weather, local geo graphy and the concentrations above-mentioned, Major industrial pollut ion sources were put into evidence. For example, the Si distribution i n Bucharest and Dobrogea region turned to be in close link with the ve getation and surface water distribution. The ratio between coarse (8 m u m) and fine (0.4 mu m) particles is related to human activity (traff ic, mining, buildings). Sulphur, in its turn, follows the territorial distribution of thermal power plants and refineries (fine particles), while coarse particles seem to concentrate in high traffic areas (Dies el engines). Pb concentrations, too, respect the traffic density distr ibution. More than 15 elements were mapped and interesting comments co uld be done.