Formaldehyde and acetaldehyde air contamination. A two years study before the introduction of new gasoline in Italy

Abstract
Probably, the future change of gasoline quality will induce a new formaldehyde (FA) and acetaldehyde (AA) atmospheric scenario. For this reason an evaluation of FA and AA air pollution has been carried out during 24 consecutive months in the Piedmont region (Italy). Results underline the direct relationship between the intensity of this pollution and geography (industrial activities and demographic density). Furthermore, FA and AA are found in higher quantity during summer but, only in this season, during workdays. Day and night results, as well as the relationship with some meteochemical parameters, show a complex aldehydes chemism characterized by many factors involved.