Environmental Monitoring and Assessment

, Volume 149, Issue 1–4, pp 241–249

Vehicular particulate matter emissions in road tunnels in Sao Paulo, Brazil

  • Odón R. Sánchez-Ccoyllo
  • Rita Y. Ynoue
  • Leila D. Martins
  • Rosana Astolfo
  • Regina M. Miranda
  • Edmilson D. Freitas
  • Alessandro S. Borges
  • Adalgiza Fornaro
  • Helber Freitas
  • Andréa Moreira
  • Maria F. Andrade
Article

DOI: 10.1007/s10661-008-0198-5

Cite this article as:
Sánchez-Ccoyllo, O.R., Ynoue, R.Y., Martins, L.D. et al. Environ Monit Assess (2009) 149: 241. doi:10.1007/s10661-008-0198-5

Abstract

In the metropolitan area of São Paulo, Brazil, ozone and particulate matter (PM) are the air pollutants that pose the greatest threat to air quality, since the PM and the ozone precursors (nitrogen oxides and volatile organic compounds) are the main source of air pollution from vehicular emissions. Vehicular emissions can be measured inside road tunnels, and those measurements can provide information about emission factors of in-use vehicles. Emission factors are used to estimate vehicular emissions and are described as the amount of species emitted per vehicle distance driven or per volume of fuel consumed. This study presents emission factor data for fine particles, coarse particles, inhalable particulate matter and black carbon, as well as size distribution data for inhalable particulate matter, as measured in March and May of 2004, respectively, in the Jânio Quadros and Maria Maluf road tunnels, both located in São Paulo. The Jânio Quadros tunnel carries mainly light-duty vehicles, whereas the Maria Maluf tunnel carries light-duty and heavy-duty vehicles. In the Jânio Quadros tunnel, the estimated light-duty vehicle emission factors for the trace elements copper and bromine were 261 and 220 μg km−1, respectively, and 16, 197, 127 and 92 mg km−1, respectively, for black carbon, inhalable particulate matter, coarse particles and fine particles. The mean contribution of heavy-duty vehicles to the emissions of black carbon, inhalable particulate matter, coarse particles and fine particles was, respectively 29, 4, 6 and 6 times higher than that of light-duty vehicles. The inhalable particulate matter emission factor for heavy-duty vehicles was 1.2 times higher than that found during dynamometer testing. In general, the particle emissions in São Paulo tunnels are higher than those found in other cities of the world.

Keywords

Emission factors Road traffic Tunnel measurements Particulate matter Megacities 

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Odón R. Sánchez-Ccoyllo
    • 1
  • Rita Y. Ynoue
    • 2
  • Leila D. Martins
    • 1
  • Rosana Astolfo
    • 1
  • Regina M. Miranda
    • 1
  • Edmilson D. Freitas
    • 1
  • Alessandro S. Borges
    • 1
  • Adalgiza Fornaro
    • 1
  • Helber Freitas
    • 1
  • Andréa Moreira
    • 3
  • Maria F. Andrade
    • 1
  1. 1.Department of Atmospheric Sciences, Institute of Astronomy, Geophysics and Atmospheric SciencesUniversity of São PauloSão PauloBrazil
  2. 2.School of Arts, Science and HumanitiesUniversity of São PauloSão PauloBrazil
  3. 3.Leopoldo A. Miguez de Mello Center for Research and DevelopmentEnvironmental Monitoring and EvaluationRio de JaneiroBrazil

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