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

Journal of the Brazilian Chemical Society

Vasconcellos, Pérola C.¹  Ávila, Simone G.¹  Oliveira, Pedro V.¹  Sanchez-Ccoyllo, Odon¹  Rocha, Gisele O. Da¹  Instituto de Pesquisas Energéticas e Nucleares, São Paulo, Brazil¹  Reis, Eduardo A. O.¹  Universidade Federal da Bahia, Salvador, Brazil¹  Universidade de São Paulo, São Paulo, Brazil¹  Souza, Davi Z.¹ 

关键词: major ion composition;    water-soluble ions;    trace elements;    seasonal distribution of atmospheric contaminants;    airborne particulate matter;   

DOI  :  

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

This study deals with the seasonal distribution of Al, Ca, Cu, Fe, K, Mg, Na, Pb and Zn and water soluble ions (Cl-, PO43-, NO3-, SO42-, 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 SO42-, NO3-, Cl- and PO43- 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-, C2O42-, K+, Mg2+, Ca2+, Fe, Pb, Zn, Al, Ca, K and Mg), (ii) gas-to-particle conversion (SO42- and NH4+) and (iii) sea salt spray (Cl-, Na+ and Na).

【 授权许可】

Unknown