Formaldehyde and acetaldehyde measurements in urban atmosphere impacted by the use of ethanol biofuel: Metropolitan Area of Sao Paulo (MASP), 2012-2013

FUEL

卷:134

Article

Nogueira, Thiago¹  Dominutti, Pamela Alejandra¹  Franco de Carvalho, Lilian Rothschild²  Fornaro, Adalgiza¹  Andrade, Maria de Fatima¹ 

[1] Univ Sao Paulo IAG USP, Inst Astron Geophys & Atmospher Sci, Dept Atmospher Sci, Sao Paulo, Brazil

[2] Univ Sao Paulo IQ USP, Inst Chem, Dept Fundamental Chem, Sao Paulo, Brazil

关键词: Air pollution;    Megacity;    NOx;    Vehicular emissions;   

DOI  :  10.1016/j.fuel.2014.05.091

来源: Elsevier

【 摘 要 】

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 Sao 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. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

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