Portal de Eventos, Congreso Colombiano y Conferencia Internacional de Calidad del Aire y Salud Pública

Tamaño de la fuente: 
Bus Passengers and drivers’ exposure to Particle Matter at inter campuses university travel in Medellin, Colombia
Jenny Rocío Ríos-Martínez, Yris Olaya Morales

Última modificación: 17/06/2019

Resumen


According to the World Health Organization, on-road vehicles are one of the main sources of air pollution in urban settings and are highly related to cardiopulmonary diseases and premature death around the world. Commuters exposure to Particulate matter (PM) during peak hours is considered as one of the high-exposure periods among various daily activities, especially in high vehicle-density metropolitan areas. Medellin is the second largest city in Colombia after Bogotá with a population of 2.214.494 inhabitants in an area of 380 km2 reported in 2005. According to reports from the Metropolitan Area of the Aburrá Valley (AMVA), in Medellin 20% of PM is emitted by the industry and 80% by the road transportation sector.

 

The aim of the present study is to determine the temporally and spatially variability in PM10 and PM2.5 concentrations inside a student bus while passengers and driver travel from the National University main Campus to Mines Faculty Medellin and then returning to the main campus using the Dylos DC-1700 portable monitor. The campaign was developed between the months of April and May 2019 during weekdays in morning off-peak hours (9-10 h) and evening peak hours (17-18 h). The monitor was placed in the middle section of the bus for measuring the passenger exposure to PM while it was place in the front section of the bus for measuring the driver exposure to PM10 and to PM2.5. Variables such as temperature and relative humidity were measured inside the bus using the portable monitor HOBO Data Loger, while the global position was measured using Google Essentials APP.

 

Passengers’ mean concentration to PM2.5 was accounted of 29 μg m−3 during off-peak hours while during peak hours was 36 μg m−3. In the case of the driver, the mean concentration during off-peak hours was 39 μg m−3 while during peak hours were 48 μg m−3. Monitoring urban air pollution will advance in building an improved transportation system for the community of the National University of Colombia as well as to increase the general knowledge of particulate matter exposure while traveling between campuses.