Seasonal distribution of airborne trace elements and water-soluble ions in São Paulo Megacity, Brazil

Autor(es)

Da Rocha, Gisele O. ^[1] ; Vasconcellos, Perola C. ^[2] ; Avila, Simone G. ^[2] ; Souza, Davi Z. ^[2] ; Reis, Eduardo A. O. ^[2] ; Oliveira, Pedro V. ^[2] ; Sanchez-Ccoyllo, Odon ^[3]

Afiliação do(s) autor(es)

^[1] Univ Fed Bahia, Inst Quim, BR-40170115 Salvador, BA - Brazil

^[2] Univ Sao Paulo, Inst Quim, BR-05508900 Sao Paulo - Brazil

^[3] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 23, n. 10, p. 1915-1924, OCT 2012.
• Citações Web of Science: 5

Resumo

This study deals with the seasonal distribution of Al, Ca, Cu, Fe, K, Mg, Na, Pb and Zn and water soluble ions (Cl-, PO4(3-), NO3-, SO4(2-), HCOO-, CH3COO-, oxalate, succinate, Na+, NH4+, K+, Mg2+ and Ca2+) found in PM10 samples (particulate matter less than 10 mm in diameter) São Paulo City, Brazil, (April 2003-May 2004). Higher atmospheric levels were found for SO4(2-), NO3-, Cl- and PO4(3-) while the main organic anions were oxalate and formate. Atmospheric levels for elements were: Fe > Al > Ca > K > Na > Mg > Zn > Cu > Pb. Some sources were predominant for some species: (i) fuel burning and/or biomass burning (NO3-, HCOO-, C2O4(2-), K+, Mg2+, Ca2+, Fe, Pb, Zn, Al, Ca, K and Mg), (ii) gas-to-particle conversion (SO4(2-) and NH4+) and (iii) sea salt spray (Cl-, Na+ and Na). (AU)

• Processo FAPESP: 01/01763-0 - Determinacao dos hidrocarbonetos policiclicos aromaticos da atmosfera de sao paulo.
• Beneficiário: Pérola de Castro Vasconcellos
• Modalidade de apoio: Auxílio à Pesquisa - Regular