Identification of emission sources from data of PM2.5 chemical speciation measured with automatic monitors: application in a coastal site of the Mediterranean basin

摘要

High-time resolution (1 hour) measurements of 11 species (organic carbon, elemental carbon,chloride, nitrite, nitrate, sulfate, sodium, ammonium, potassium, magnesium, calcium) withinthe PM2.5 were conducted, from 3rd May to 30th June 2010, in a coastal site of Basilicata(Italy). Acquired data were analysed through Positive Matrix Factorization (PMF) method inorder to individuate potential emission sources. This source apportionment evaluation revealed5 factors separated as Vehicular traffic, Combustion of biomass, Secondary aerosol, Agedmarine, Marine fresh and Dust. For each factor were defined profile, temporal trend, 24hcycleand percentage contribution to measured PM2.5, also emphasizing the relationship betweenfactors and different wind conditions.