Use of passive diffusion sampling method for defining NO2 concentrations gradient in São Paulo, Brazil (2006)
- Authors:
- Autor USP: CARDOSO, MARIA REGINA ALVES - FSP
- Unidade: FSP
- DOI: 10.1186/1476-069x-5-19
- Subjects: POLUIÇÃO ATMOSFÉRICA; VEÍCULOS AUTOMOTORES (EMISSÃO;ESTATÍSTICAS E DADOS NUMÉRICOS); NITROGÊNIO (ANÁLISE); MONITORAMENTO AMBIENTAL; EXPOSIÇÃO AMBIENTAL; EXPOSIÇÃO AMBIENTAL (NÍVEL)
- Language: Inglês
- Abstract: Background: Air pollution in São Paulo is constantly being measured by the State of Sao Paulo Environmental Agency, however there is no information on the variation between places with different traffic densities. This study was intended to identify a gradient of exposure to traffic-related air pollution within different areas in São Paulo to provide information for future epidemiological studies. Methods: We measured NO2 using Palmes' diffusion tubes in 36 sites on streets chosen to be representative of different road types and traffic densities in São Paulo in two one-week periods (July and August 2000). In each study period, two tubes were installed in each site, and two additional tubes were installed in 10 control sites. Results: Average NO2 concentrations were related to traffic density, observed on the spot, to number of vehicles counted, and to traffic density strata defined by the city Traffic Engineering Company (CET). Average NO2 concentrations were 63µg/m3 and 49µg/m3 in the first and second periods, respectively. Dividing the sites by the observed traffic density, we found: heavy traffic (n = 17): 64µg/m3 (95 percent CI: 59µg/m3 68µg/m3); local traffic (n = 16): 48µg/m3 (95Percent CI: 44µg/m3 52µg/m3)(p<0.001).Conclusion: The differences in NO2 levels between heavy and local traffic sites are large enough to suggest the use of a more refined classification of exposure in epidemiological studies in the city. Number of vehicles counted,traffic density observed on the spot and traffic density strata defined by the CET might be used as a proxy for traffic exposure in São Paulo when more accurate measurements are not available
- Imprenta:
- Source:
- Título do periódico: Environmental Health: a global access science source
- ISSN: 1476-069X
- Volume/Número/Paginação/Ano: v. 5, n. 1, p. 19-27, 2006
- Este periódico é de acesso aberto
- Este artigo é de acesso aberto
- URL de acesso aberto
- Cor do Acesso Aberto: gold
- Licença: cc-by
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ABNT
SILVA, Agnes Soares da et al. Use of passive diffusion sampling method for defining NO2 concentrations gradient in São Paulo, Brazil. Environmental Health: a global access science source, v. 5, n. 1, p. 19-27, 2006Tradução . . Disponível em: https://doi.org/10.1186/1476-069x-5-19. Acesso em: 04 maio 2024. -
APA
Silva, A. S. da, Cardoso, M. R. A., Meliefste, K., & Brunekreef, B. (2006). Use of passive diffusion sampling method for defining NO2 concentrations gradient in São Paulo, Brazil. Environmental Health: a global access science source, 5( 1), 19-27. doi:10.1186/1476-069x-5-19 -
NLM
Silva AS da, Cardoso MRA, Meliefste K, Brunekreef B. Use of passive diffusion sampling method for defining NO2 concentrations gradient in São Paulo, Brazil [Internet]. Environmental Health: a global access science source. 2006 ; 5( 1): 19-27.[citado 2024 maio 04 ] Available from: https://doi.org/10.1186/1476-069x-5-19 -
Vancouver
Silva AS da, Cardoso MRA, Meliefste K, Brunekreef B. Use of passive diffusion sampling method for defining NO2 concentrations gradient in São Paulo, Brazil [Internet]. Environmental Health: a global access science source. 2006 ; 5( 1): 19-27.[citado 2024 maio 04 ] Available from: https://doi.org/10.1186/1476-069x-5-19 - The role of respiratory viral infections among children hospitalized for community-acquired pneumonia in a developing country
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Informações sobre o DOI: 10.1186/1476-069x-5-19 (Fonte: oaDOI API)
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