Abstract
Exposure to pollutants is usually higher in cities than in the countryside. Generally, in the urban areas pollution sources as traffic, power generator and domestic heating system are more intense and spatially distributed. The pollutants can be classified as a function of long-term toxicological effects due to an exposure and inhalation. In the present work, several kinds of pollutants concentration generated in Rome during 2015 have been analyzed applying different advanced post-processing technique. In particular, statistic and cross-statistic have been computed in time and phase space domain. As main result, it is observed, as expected, that all the pollutant concentrations increase during the winter season into a couple of time ranges despite of [O3] that has high values in summer. It can be clearly concluded that Rome has a strongly unsteady behaviour in terms of a family of pollutant concentration, which fluctuate significantly. It is worth noticing that there is a strong linear dependence between [C6H6] and [NO] and a more complex interdependence of [O3] and [C6H6]. Qualitatively is provided that, to a reduction of [C6H6] under a certain threshold level corresponds an increase of [O3].
Highlights
Outdoor air pollution has myriad sources, both natural and anthropogenic. It is a mixture of mixtures, and the mix of contaminants in outdoor air varies widely in space and time, reflecting variation in its sources, weather, atmospheric transformations and other factors
Observance of air quality standards represents a great challenge in cities, especially in the ones in which traffic and other additional sources are combined with bad weather conditions
With reference to this issue, the results provided shown that the major pollutant concentrations are observed in the winter seasons during the intense traffic flow and the threshold values are often exceeded
Summary
Outdoor air pollution has myriad sources, both natural and anthropogenic. It is a mixture of mixtures, and the mix of contaminants in outdoor air varies widely in space and time, reflecting variation in its sources, weather, atmospheric transformations and other factors. The air pollutants result higher in urban area because of a combination of many elements such as industrial activities, energy production plants and domestic heating [3]. They are noticeable by the toxicological effects resulting from long-term exposure via inhalation [4]
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