Assessing VOC emissions from different gas stations: impacts, variations, and modeling fluctuations of air pollutants.

Autor: Heidari EA; Master of Environmental Health Engineering, Health Center of Torbat-e Heydarieh, Torbat-e Heydarieh University of Medical Sciences, Torbat-e Heydarieh, Iran., Sarkhosh M; Department of Environmental Health Engineering, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran. Marya.sarkhosh@yahoo.com., Alidadi H; Department of Environmental Health Engineering, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran., Najafpoor AA; Department of Environmental Health Engineering, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran., Esmaily H; Department of Environmental Health Engineering, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran.; Department of Biostatistics, Research Health Center, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran., Shamsara E; Management and Social Determinants of Health Research Center, Mashhad University of Medical Sciences, Mashhad, 91778-99191, Iran.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Jul 18; Vol. 14 (1), pp. 16617. Date of Electronic Publication: 2024 Jul 18.
DOI: 10.1038/s41598-024-67542-4
Abstrakt: Gas stations distributed around densely populated areas are responsible for toxic pollutant emissions such as volatile organic compounds (VOCs). This study aims to measure VOCs emission from three different kinds of gas stations to determine the extent of pollution from the gas stations and the most frequent type of VOC compound emitted. The concentrations of ambient VOCs at three refueling stations with a different type of fuels in Mashhad were monitored. The result of this study showed that CNG fuel stations are less polluting than petrol stations. In all the studied sites, the highest concentrations were related to xylene isomers, irrespective of the fuel type. Total VOCs at the supply of both compressed natural gas (CNG) and gasoline stations was 482.36 ± 563.45 µg m -3 . At a CNG station and a gasoline station, total VOC concentrations were 1363.4 ± 1975 µg m -3 and 410.29 ± 483.37 µg m -3 , respectively. The differences in concentrations of toluene and m,p-xylene between the fuel stations can be related to the quality and type of fuel, vapor recovery technology, fuel reserves, dripless nozzles, traffic density in these stations, meteorological conditions and the location of sampling sites. The combination of a sine function and a quadratic function could model the fluctuation behavior of air pollutants like m,p-xylene. In all the sites, the highest concentrations were related to xylene isomers, irrespective of the type of fuel. The changing rate of m,p-xylene pollutant in each station was also modeled in this study.
(© 2024. The Author(s).)
Databáze: MEDLINE
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