Artículos de revistas
Formaldehyde and acetaldehyde measurements in urban atmosphere impacted by the use of ethanol biofuel: Metropolitan Area of Sao Paulo (MASP), 2012–2013
Date
2014Registration in:
Fuel, Philadelphia, v. 134, p. 505-513, 2014
0016-2361
10.1016/j.fuel.2014.05.091
Author
Nogueira, Thiago
Dominutti, Pamela Alejandra
Carvalho, Lilian Rothschild Franco de
Fornaro, Adalgiza
Andrade, Maria de Fatima
Institutions
Abstract
There is a consensus that particulate matter and gases pollutants originating from industry and vehicle
emission processes in urban areas are important from the point of view of public health and climate
change. Local anthropogenic emissions, especially those resulting from energy generation processes from
the industrial and transport sector, are connected with those occurring at the regional and global scales. A
major concern in the Metropolitan Area of São Paulo (MASP) is the impact of the large scale use of ethanol
as a fuel and as an additive for Otto vehicles. In this study, atmospheric concentrations of ozone, nitrogen
oxides (NO and NO2), formaldehyde and acetaldehyde were measured in the MASP in Brazil, over four
seasons in 2012 and 2013. The results were compared with data collected in previous studies. Our results
demonstrate that, although there was a large increase in the number of vehicles in the MASP that use
ethanol (‘‘flex-fuel’’ vehicles), technological advances in vehicle emissions control have prevented any
significant increase in the atmospheric concentrations of aldehydes. In addition, an increase in the
formaldehyde/acetaldehyde ratio has been observed.