Modeling of carbon monoxide emissions and study of distribution pattern in Beyhaghi passenger terminal in Tehran

Subject Areas : Air Pollution

maryam karimi ¹ , Farzam Babaie ² , Hooman Bahman pour ³ , mohamadreza Tapesh ⁴ , ali mohammadi ⁵

1 - Ph.D. Student, Department of Environmental Management, Faculty of Natural Resources and The Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 - Department of Environmental Management, Faculty of Natural Resources and The Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran. *(Corresponding Author)
3 - Department of Environment, Faculty of Engineering, Shahrood Branch, Islamic Azad University, Shahrood, Iran.
4 - Department of Environmental Management, Faculty of Natural Resources and The Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
5 - Department of Environmental Management, Faculty of Natural Resources and The Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran.

Received: 2022-07-30 Accepted : 2022-11-19 Published : 2024-06-21

Keywords: carbon monoxide, emission pattern, Austal software, Beyhaghi terminal. ,

Abstract :

Background and Objective: The purpose of this research is to measure carbon monoxide in Tehran's Beyhaghi Terminal and modeling the release of this pollutant under various scenarios.

Material and Methodology: In the first step; 2 scenarios were imagined for this research. One of them is to examine the emission model of carbon monoxide pollutant under current conditions; and the other was to examine the emission model under management conditions and to apply emission reduction strategies. NIOSH method number 6604 was used for sampling. Measurements were made in 2021-2022 and in 3 points sampling was done once a month during the year, three days a month and 3 times a day, and the sampling was done at different times of the day, i.e. morning, noon and evening, according to the increase and decrease of vehicle traffic. And for the purpose of modeling, Austal view, version 7 software was used.

Findings: In both scenarios, the distribution of carbon monoxide pollutant (8 hours) shows that the highest concentration of the pollutant is at the origin and terminal location. The pollutant spreads in all directions and the farthest zone of pollutant penetration will be on the eastern side of the terminal at a distance of 1000 meters. Since the amount of pollutant for Beyhaghi terminal is less than domestic and foreign standards, it can be said that the status of this pollutant will not exceed the standard. Of course, the air quality under the second scenario is better than the first scenario, so that after 8 hours, the pollutant concentration does not exceed 4 ppm in any range. Of course, this range will also penetrate less than 300 meters in all directions, with the exception of the eastern direction, which extends to about 600 meters.

Discussion and Conclusion: Considering that in the first scenario, the amount of carbon monoxide pollution is within the approved standards, but due to the presence of other pollutants and the possibility of synergy between them, it is necessary to pay attention to improving the quality of the environment by using management strategies. For this reason, the second scenario indicates a further reduction of this pollutant. Reducing the stopping time of cars, not turning on the lights and using exhaust absorbent filters help to reduce the emission of carbon monoxide pollutant.

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