CARACTERIZATION OF FINE AND COARSE PARTICULATE MATTER AND COMPOSITION OF THE WATER-SOLUBLE INORGANIC FRACTION IN SAO JOSE DOS CAMPOS (SP)

摘要

CARACTERIZATION OF FINE AND COARSE PARTICULATE MATTER AND COMPOSITION OF THE WATER-SOLUBLE INORGANIC FRACTION IN SAO JOSE DOS CAMPOS (SP). Air samples of fine (PM2.5) and coarse (PM2.5-10) particulate matter were collected in Sao Jose dos Campos front February 2004 to February 2005. Average PM10 mass concentrations was 31.2 +/- 14.0 mu g m(-3), half of which belonging to the PM2.5 fraction. Ammonium and SO43- were predominantly found in the fine fraction. Average (NH4)(2)SO4 concentration was estimated to be about 2.9 mu g m(-3). Chloride, Na+ and NO3- were mostly associated with PM2.5-10. Chloride deficits with respect to sea-salt CI/Na ratio were found in both size fractions.