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Traffic and catalytic converter - related atmospheric contamination in the metropolitan region of the city of Rio de Janeiro, Brazil
Authors:da Silva Lílian Irene Dias  de Souza Sarkis Jorge Eduardo  Zotin Fátima Maria Zanon  Carneiro Manuel Castro  Neto Arnaldo Alcover  da Silva Alzira dos Santos Amaral Gomes  Cardoso Mauri José Baldini  Monteiro Maria Inês Couto
Affiliation:Coordena??o de Análises Minerais, Centro de Tecnologia Mineral - CETEM, Av. Pedro Calmon 900, Cidade Universitária, CEP 21941-908 Rio de Janeiro, R.J., Brazil.
Abstract:In this work, 24-h PM10 samples were collected in Rio de Janeiro, Brazil, and analysed for trace elements (Cd, Ce, Cu, La, Mo, Ni, Pb, Pd, Rh, Sb and Sn). The sampling was carried out at five locations (Bonsucesso; Centro, downtown city; Copacabana; Nova Igua?u and Sumaré) with different traffic densities and anthropogenic activities. An analytical method based on the EPA method for the determination of trace elements in airborne particulate matter (PM), using ultrasonic-assisted extraction and inductively coupled plasma mass spectrometry (ICP-MS) was applied. Our results suggest that vehicular traffic is the most important source of environmental pollution at the studied sites. The presence of Mo, Pd and Rh in the analysed filters reflects an additional source of pollution caused by the erosion and deterioration of automotive catalytic converters.
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