Passengers Exposure to PM2.5 in Self-polluted BRT-Diesel Operated Transport System Microenvironments
BRT (Bus Rapid Transport) vehicles are a frequented microenvironment, it consists of exclusive lines for the transport of passengers in articulated buses. In many large cities of developing countries BRT vehicles are diesel operated buses emitting important amounts of PM2.5, a pollutant related with...
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| Format: | Article |
| Language: | English |
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Springer
2020-06-01
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| Series: | Asian Journal of Atmospheric Environment |
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| Online Access: | http://asianjae.org/_common/do.php?a=current&b=11&bidx=2003&aidx=24354 |
| _version_ | 1797765847303847936 |
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| author | Guevara-Luna, Fredy Alejandro Guevara-Luna, Marco Andrés Belalcázar-Cerón, Luis Carlos |
| author_facet | Guevara-Luna, Fredy Alejandro Guevara-Luna, Marco Andrés Belalcázar-Cerón, Luis Carlos |
| author_sort | Guevara-Luna, Fredy Alejandro |
| collection | DOAJ |
| description | BRT (Bus Rapid Transport) vehicles are a frequented microenvironment, it consists of exclusive lines for the transport of passengers in articulated buses. In many large cities of developing countries BRT vehicles are diesel operated buses emitting important amounts of PM2.5, a pollutant related with many health affectations. Evidence of high exposure levels have been reported onboard BRT vehicles, but detailed analysis of self-pollutions has not been developed. In this research, measurements of PM2.5 inside the BRT system of Bogota called TransMilenio were performed. Speed and location data were recorded in real-time. In-situ measurements were performed in 3 lines of the system: Av. El Dorado, Av. Caracas and Calle 80, in different seat locations inside the buses. PM2.5 concentrations above 120 μg/m3 were measured for all the cases studied. Values above the 24 h WHO (World Health Organization) recommendation were registered. Trips were determined to be between 20 to 40 minutes per passenger. A CFD (Computational Fluid Dynamics) model was implemented to simulate the exhaust emissions from the buses, 3 traffic velocities of BRT were evaluated: 20, 32 and 60 km/h. Measurements and simulation results were used to calculate the self-pollution ratios inside the vehicles. The rear of the buses was identified as the most polluted section onboard with a ratio of selfpollution about 35% average. |
| first_indexed | 2024-03-12T20:16:58Z |
| format | Article |
| id | doaj.art-e25fd7eee0e441539373f1d23e939ae3 |
| institution | Directory Open Access Journal |
| issn | 1976-6912 2287-1160 |
| language | English |
| last_indexed | 2024-03-12T20:16:58Z |
| publishDate | 2020-06-01 |
| publisher | Springer |
| record_format | Article |
| series | Asian Journal of Atmospheric Environment |
| spelling | doaj.art-e25fd7eee0e441539373f1d23e939ae32023-08-02T01:20:19ZengSpringerAsian Journal of Atmospheric Environment1976-69122287-11602020-06-0114210511810.5572/ajae.2020.14.2.105Passengers Exposure to PM2.5 in Self-polluted BRT-Diesel Operated Transport System MicroenvironmentsGuevara-Luna, Fredy Alejandro0https://orcid.org/0000-0003-2742-8982Guevara-Luna, Marco Andrés1https://orcid.org/0000-0002-1541-4332Belalcázar-Cerón, Luis Carlos2https://orcid.org/0000-0001-7377-2755Universidad Nacional de Colombia, Departamento de Ingeniería Química y Ambiental, Grupo de Investigación de Calidad del Aire (GICA), Bogotá, ColombiaUniversidad Nacional de Colombia, Departamento de Ingeniería Química y Ambiental, Grupo de Investigación de Calidad del Aire (GICA), Bogotá, ColombiaUniversidad Nacional de Colombia, Departamento de Ingeniería Química y Ambiental, Grupo de Investigación de Calidad del Aire (GICA), Bogotá, ColombiaBRT (Bus Rapid Transport) vehicles are a frequented microenvironment, it consists of exclusive lines for the transport of passengers in articulated buses. In many large cities of developing countries BRT vehicles are diesel operated buses emitting important amounts of PM2.5, a pollutant related with many health affectations. Evidence of high exposure levels have been reported onboard BRT vehicles, but detailed analysis of self-pollutions has not been developed. In this research, measurements of PM2.5 inside the BRT system of Bogota called TransMilenio were performed. Speed and location data were recorded in real-time. In-situ measurements were performed in 3 lines of the system: Av. El Dorado, Av. Caracas and Calle 80, in different seat locations inside the buses. PM2.5 concentrations above 120 μg/m3 were measured for all the cases studied. Values above the 24 h WHO (World Health Organization) recommendation were registered. Trips were determined to be between 20 to 40 minutes per passenger. A CFD (Computational Fluid Dynamics) model was implemented to simulate the exhaust emissions from the buses, 3 traffic velocities of BRT were evaluated: 20, 32 and 60 km/h. Measurements and simulation results were used to calculate the self-pollution ratios inside the vehicles. The rear of the buses was identified as the most polluted section onboard with a ratio of selfpollution about 35% average.http://asianjae.org/_common/do.php?a=current&b=11&bidx=2003&aidx=24354microscale air qualityparticulate matterpublic transportdiesel operated buspollutant dispersionurban microenvironment |
| spellingShingle | Guevara-Luna, Fredy Alejandro Guevara-Luna, Marco Andrés Belalcázar-Cerón, Luis Carlos Passengers Exposure to PM2.5 in Self-polluted BRT-Diesel Operated Transport System Microenvironments Asian Journal of Atmospheric Environment microscale air quality particulate matter public transport diesel operated bus pollutant dispersion urban microenvironment |
| title | Passengers Exposure to PM2.5 in Self-polluted BRT-Diesel Operated Transport System Microenvironments |
| title_full | Passengers Exposure to PM2.5 in Self-polluted BRT-Diesel Operated Transport System Microenvironments |
| title_fullStr | Passengers Exposure to PM2.5 in Self-polluted BRT-Diesel Operated Transport System Microenvironments |
| title_full_unstemmed | Passengers Exposure to PM2.5 in Self-polluted BRT-Diesel Operated Transport System Microenvironments |
| title_short | Passengers Exposure to PM2.5 in Self-polluted BRT-Diesel Operated Transport System Microenvironments |
| title_sort | passengers exposure to pm2 5 in self polluted brt diesel operated transport system microenvironments |
| topic | microscale air quality particulate matter public transport diesel operated bus pollutant dispersion urban microenvironment |
| url | http://asianjae.org/_common/do.php?a=current&b=11&bidx=2003&aidx=24354 |
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