Abstract
Many studies have been performed in order to characterize the sources of airborne particles in the Metropolitan Area of São Paulo (MASP), in Brazil. Those studies have been based on receptor modeling and most of the uncertainties in their results are related to the emission profile of the resuspended road dust particles. In this study, we analyzed the composition of resuspended road dust particles in different environments: local streets, paved roads inside traffic tunnels, and high traffic streets. We analyzed the samples to quantify the concentrations of trace elements and black carbon. On the basis of that analysis, we developed emission profiles of the resuspended road dust that are representative of the different types of urban pavement in the MASP. This study is important given the international efforts in improving emissions factors with local characteristics, mainly in South America and other regions for which there is a lack of related information. This work presents emission profiles derived from resuspended road dust samples that are representative of the different types of urban pavement in the Metropolitan Area of São Paulo.
Highlights
IntroductionThe particles emitted by vehicles can originate from exhaust and non-exhaust emissions
Airborne particles that originate from vehicle emissions are known to cause a variety of deleterious health effects, such as cardiorespiratory diseases and intrauterine mortality [1,2].The particles emitted by vehicles can originate from exhaust and non-exhaust emissions
It has been estimated that urban road dust resuspension is responsible for 8% of the total PM2.5 concentration in the Metropolitan Area of
Summary
The particles emitted by vehicles can originate from exhaust and non-exhaust emissions. Non-exhaust particles comprise those generated from brake and tire wear; road surface abrasion; and corrosion. The resuspended road dust identified in the source apportionment of the atmospheric aerosol is composed of particles originating from the abrasion of different pavements, including bare soil and asphalt. Road surfaces are contaminated by the deposition of pollutants from anthropogenic sources, mainly vehicle emissions. The resuspension of urban road dust affects the concentration of particulate matter (PM) smaller than 10 microns (PM10 ) and that of fine particles—those smaller than 2.5 microns (PM2.5 ). It has been estimated that urban road dust resuspension is responsible for 8% of the total PM2.5 concentration in the Metropolitan Area of
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
