Please use this identifier to cite or link to this item:
Title: Emission factors for a biofuel impacted fleet in south America's largest metropolitan area
Author: Pereira, Guilherme Martins
Kamigauti, Leonardo Yoshiaki
Nogueira, Thiago
Gavidia-Calderón, Mario Eduardo
Monteiro Dos Santos, Djacinto
Evtyugina, Margarita
Alves, Célia
Vasconcellos, Pérola de Castro
de Freitas, Edmilson Dias
Andrade, Maria de Fatima
Keywords: Emission factors
Vehicular fleet
Particulate matter
Issue Date: 15-May-2023
Publisher: Elsevier
Abstract: The Metropolitan Area of São Paulo (MASP) is among the largest urban areas in the Southern Hemisphere. Vehicular emissions are of great concern in metropolitan areas and MASP is unique due to the use of biofuels on a large scale (sugar-cane ethanol and biodiesel). In this work, tunnel measurements were employed to assess vehicle emissions and to calculate emission factors (EFs) for heavy-duty and light-duty vehicles (HDVs and LDVs). The EFs were determined for particulate matter (PM) and its chemical compounds. The EFs obtained for 2018 were compared with previous tunnel experiments performed in the same area. An overall trend of reduction of fine and coarse PM, organic carbon (OC), and elemental carbon (EC) EFs for both LDVs and HDVs was observed if compared to those observed in past years, suggesting the effectiveness of vehicular emissions control policies implemented in Brazil. A predominance of Fe, Cu, Al, and Ba metals emission was observed for the LDV fleet in the fine fraction. Cu presented higher emissions than two decades ago, which was associated with the increased use of ethanol fuel in the region. For HDVs, Zn and Pb were mostly emitted in the fine mode and were linked with lubricating oil emissions from diesel vehicles. A predominance in the emission of three- and four-ring polycyclic aromatic hydrocarbons (PAHs) for HDVs and five-ring PAHs for LDVs agreed with what was observed in previous studies. The use of biofuels may explain the lower PAH emissions for LDVs (including carcinogenic BaP) compared to those observed in other countries. The tendency observed was that LDVs emit higher amounts of carcinogenic species. The use of these real EFs in air quality modeling resulted in more accurate simulations of PM concentrations, showing the importance of updating data with real-world measurements.
Peer review: yes
DOI: 10.1016/j.envpol.2023.121826
ISSN: 0269-7491
Appears in Collections:CESAM - Artigos
DAO - Artigos

Files in This Item:
File Description SizeFormat 
Emission-factors-for-a-biofuel-impacted-fleet-in-south-A_2023_Environmental-.pdf1.94 MBAdobe PDFembargoedAccess

Formato BibTex MendeleyEndnote Degois 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.