A set of 15 atmospheric aerosol samples was collected in an industrial area of Lisbon, Portugal and then analyzed by instrumental
neutron activation analysis (INAA). Both fine and coarse aerosol samples were collected during November and December 2001
on polycarbonate filters with Gent samplers. The INAA methodology utilized both thermal and epithermal neutron irradiations.
Compton suppressed and normal gamma-ray spectra were acquired simultaneously for each measurement and the elemental concentrations
of 30 elements were determined. Enrichment factors, wind speed comparison and receptor modeling techniques were applied to
obtain the different source contributions of the aerosols. Crustal, marine and anthropogenic sources were identified. The
anthropogenic elements have origin mainly in the area close to the sampling site (<5 km), with the exception of Ca and V.
A direct relationship was observed between the anthropogenic atmospheric aerosol concentrations and wind speed.