Atmospheric levels of formaldehyde and acetaldehyde and their relationship with the vehicular fleet composition in Salvador, Bahia, Brazil

Journal of the Brazilian Chemical Society

Andrade, Marta V.¹  Andrade, Jailson B. de¹  Pinheiro, Heloisa L.C.¹  UFBA, Salvador, Brazil¹ 

关键词: formaldehyde;    acetaldehyde;    carbonyl;    alcohol-fueled vehicles;   

DOI  :  10.1590/S0103-50531998000300004

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Aldehyde sources in the atmosphere include primary emissions from natural vegetation, industrial plants, incinerators and automobiles, as well as secondary ones via photo-oxidation of methane, isoprene, and other biogenic and anthropogenic hydrocarbons1. The two most abundant aldehydes in ambient air are formaldehyde and acetaldehyde1. They are of great significance to atmospheric chemistry due to the strong influence these species have on photochemical reactions that lead to the formation of important smog components such as nitric acid, peroxiacetylnitrate (PAN), and several others1-3. In the past decade a substantial amount of information on surface atmospheric levels of formaldehyde and acetaldehyde has been generated2-14. However, most of the knowledge about formaldehyde and, principally, of acetaldehyde in the atmosphere comes from measurements in countries where the vehicular fleet is fueled with gasoline and diesel. In this way, information of aldehyde levels, emitted in countries, as is the

【 授权许可】

Unknown