Updating Real-World Profiles of Volatile Organic Compounds and Their Reactivity Estimation in Tunnels of Mexico City
The main objective of this work was to bring to date the exhaust and evaporative volatile organic compound (VOC) profiles from light-duty gasoline vehicles, carrying out a sampling and analysis campaign in two tunnels of Mexico City. The abundance of exhaust-emission VOC profiles was the same in 201...
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| Format: | Article |
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MDPI AG
2020-12-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/11/12/1339 |
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| author | Violeta Mugica-Álvarez Miguel Magaña-Reyes Adriana Martínez-Reyes Jesús Figueroa-Lara Salvador Blanco-Jiménez Valia Goytia-Leal Victor H. Páramo-Figueroa Rocío García-Martínez |
| author_facet | Violeta Mugica-Álvarez Miguel Magaña-Reyes Adriana Martínez-Reyes Jesús Figueroa-Lara Salvador Blanco-Jiménez Valia Goytia-Leal Victor H. Páramo-Figueroa Rocío García-Martínez |
| author_sort | Violeta Mugica-Álvarez |
| collection | DOAJ |
| description | The main objective of this work was to bring to date the exhaust and evaporative volatile organic compound (VOC) profiles from light-duty gasoline vehicles, carrying out a sampling and analysis campaign in two tunnels of Mexico City. The abundance of exhaust-emission VOC profiles was the same in 2018 as in 1998 (alkanes > aromatics > olefins > acetylene), albeit exhibiting large differences (67%, 17%, 12%, and 4% for 2018, and 50%, 26%, 16%, and 8% for 1998, respectively). An important reduction of 69% and 77% in VOC concentrations was registered inside and outside of the tunnel, respectively, in comparison with 1998. In the ambient air, alkanes accounted for 77%, since high concentrations of liquefied petroleum (LP) gas species are still present. Ethylene, propylene, 1-butene, and toluene from tunnel emissions contributed prominently to ozone formation, while the most reactive gasoline vapors were pentenes, pentanes, and butenes, although the ozone formation potential due to VOCs in tunnel emissions and ambient air also had a significant reduction. These results demonstrate that strategies carried out in the last 20 years were successful in achieving a better air quality, although the aromatic and olefin content in gasolines needs to be further reduced to lower the concentrations of toxic and reactive species. |
| first_indexed | 2024-03-10T14:11:58Z |
| format | Article |
| id | doaj.art-a751a6ddb3a245f2afac570136235650 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T14:11:58Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-a751a6ddb3a245f2afac5701362356502023-11-21T00:05:23ZengMDPI AGAtmosphere2073-44332020-12-011112133910.3390/atmos11121339Updating Real-World Profiles of Volatile Organic Compounds and Their Reactivity Estimation in Tunnels of Mexico CityVioleta Mugica-Álvarez0Miguel Magaña-Reyes1Adriana Martínez-Reyes2Jesús Figueroa-Lara3Salvador Blanco-Jiménez4Valia Goytia-Leal5Victor H. Páramo-Figueroa6Rocío García-Martínez7Basic Sciences, Universidad Autónoma Metropolitana-Azcapotzalco, Mexico City 02200, MexicoInstituto Nacional de Ecología y Cambio Climático, Mexico City 14210, MexicoBasic Sciences, Universidad Autónoma Metropolitana-Azcapotzalco, Mexico City 02200, MexicoBasic Sciences, Universidad Autónoma Metropolitana-Azcapotzalco, Mexico City 02200, MexicoInstituto Nacional de Ecología y Cambio Climático, Mexico City 14210, MexicoInstituto Nacional de Ecología y Cambio Climático, Mexico City 14210, MexicoComisión Ambiental de la Megalópolis, Mexico City 11320, MexicoCentro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, Mexico City 02202, MexicoThe main objective of this work was to bring to date the exhaust and evaporative volatile organic compound (VOC) profiles from light-duty gasoline vehicles, carrying out a sampling and analysis campaign in two tunnels of Mexico City. The abundance of exhaust-emission VOC profiles was the same in 2018 as in 1998 (alkanes > aromatics > olefins > acetylene), albeit exhibiting large differences (67%, 17%, 12%, and 4% for 2018, and 50%, 26%, 16%, and 8% for 1998, respectively). An important reduction of 69% and 77% in VOC concentrations was registered inside and outside of the tunnel, respectively, in comparison with 1998. In the ambient air, alkanes accounted for 77%, since high concentrations of liquefied petroleum (LP) gas species are still present. Ethylene, propylene, 1-butene, and toluene from tunnel emissions contributed prominently to ozone formation, while the most reactive gasoline vapors were pentenes, pentanes, and butenes, although the ozone formation potential due to VOCs in tunnel emissions and ambient air also had a significant reduction. These results demonstrate that strategies carried out in the last 20 years were successful in achieving a better air quality, although the aromatic and olefin content in gasolines needs to be further reduced to lower the concentrations of toxic and reactive species.https://www.mdpi.com/2073-4433/11/12/1339VOCstunnelozoneozone formation potentialgasolinesVOC profiles |
| spellingShingle | Violeta Mugica-Álvarez Miguel Magaña-Reyes Adriana Martínez-Reyes Jesús Figueroa-Lara Salvador Blanco-Jiménez Valia Goytia-Leal Victor H. Páramo-Figueroa Rocío García-Martínez Updating Real-World Profiles of Volatile Organic Compounds and Their Reactivity Estimation in Tunnels of Mexico City Atmosphere VOCs tunnel ozone ozone formation potential gasolines VOC profiles |
| title | Updating Real-World Profiles of Volatile Organic Compounds and Their Reactivity Estimation in Tunnels of Mexico City |
| title_full | Updating Real-World Profiles of Volatile Organic Compounds and Their Reactivity Estimation in Tunnels of Mexico City |
| title_fullStr | Updating Real-World Profiles of Volatile Organic Compounds and Their Reactivity Estimation in Tunnels of Mexico City |
| title_full_unstemmed | Updating Real-World Profiles of Volatile Organic Compounds and Their Reactivity Estimation in Tunnels of Mexico City |
| title_short | Updating Real-World Profiles of Volatile Organic Compounds and Their Reactivity Estimation in Tunnels of Mexico City |
| title_sort | updating real world profiles of volatile organic compounds and their reactivity estimation in tunnels of mexico city |
| topic | VOCs tunnel ozone ozone formation potential gasolines VOC profiles |
| url | https://www.mdpi.com/2073-4433/11/12/1339 |
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