Evaluación multitemporal de las emisiones atmosféricas de no2 y so2 del tráfico vehicular mediante el uso de muestreadores pasivos en el terminal terrestre de Baños de Agua Santa

Abstract

The objective of this investigation was to evaluate the atmospheric emissions of nitrogen dioxide (NO2) and sulfur dioxide (SO2) in the Baños de Agua Santa bus terminal through passive sampling for six weeks; the samples were collected in tubes Located at the height of 3m at 21 points within a 250m radius, the points were selected at random and based on technical criteria. The samples were analyzed by UV-Visible spectrophotometry in the Faculty of Sciences Research laboratory. After applying standardized formulas, NO2 and SO2 concentration data were obtained from the study area. The vehicle flow was simulated in the PTV Vissim software using the vehicle count data obtained at 6 points in the area. ArcGIS and Enviver Enterprise software created maps illustrating areas with contamination levels. Finally, surveys were carried out on passers-by at the study site to determine the incidence of air quality in their daily lives. The results showed that point 11 had the highest concentration value, with 10.44 ug/m3 for NO2 and SO2; it was point 13, with a value of 13 ug/m3. Therefore, it was determined that the emissions of these pollutants do not exceed the permissible limits established in Ministerial Agreement 097A Book VI Annex 4 with a value of 200 ug/m3 per hour for NO2 and 125 ug/m3 per day for SO2. The results of the vehicle simulation and the applied surveys confirmed that the air quality in the study area is relatively good. Therefore, monitoring over a more extended period is recommended to corroborate data on concentrations.