The Sao Paulo Metropolitan area (SPMA) is characterized as having one of the worst air pollution problems in Brazil, with frequent violations of air quality standards for particulate matter. This paper presents the results of a receptor model source apportionment study carried out to develop a quantitative database on which a control strategy could be developed. The study was conducted in four sites with distinct land uses. Fine, coarse (CP), and total suspended particles (TSP) samples were collected in Teflon glass filters and analyzed by x-ray fluorescence (XRF), ion chromoatography, and thermal evolution. The sources were characterized by similar methodology. Chemical mass balance (CMB) receptor modeling indicated that carbonaceous material plays an important role in the aerosol composition; that the three major source categories contributing to the fine particles are vehicles, secondary carbon, and sulfates; and that the main contributors to CP and TSP are road dust and vehicles. All sampling sites presented the same general pattern in terms of source contribution, although this contribution varied from site to site.
Sao Paulo aerosol characterization study
Journal of the Air and Waste Management Association ; 47 , 12 ; 1297-1300
1997
4 Seiten, 1 Bild, 6 Tabellen, 7 Quellen
Aufsatz (Zeitschrift)
Englisch
Stadt , Brasilien , Luftverschmutzung , Datenbank , Feinkorn , Grobkorn , Schwebstoff , Aerosol , Stoffbilanz , Kraftfahrzeug , Länderbericht
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