Analysis of the sensitivity of air pollution emissions of a steel factory to the prevailing wind direction

Subject Areas : Air Pollution

zahra mansurian ¹ , Farhad Nejadkoorki ²

1 - MSc. in environmental pollution, School of Natural Resources and Desert Studies, Yazd University, Yazd, Iran.
2 - Associate Professor, Department of Environmental Science, School of Natural Resources and Desert Studies , Yazd University, Yazd, Iran. *(Corresponding Author)

Received: 2022-11-26 Accepted : 2023-04-06 Published : 2023-06-22

Keywords: steel factory, Suspended particles, Wind, Air pollution, AERMOD,

Abstract :

Background and Objective: wrong locations and overloading in the steel industry have led to the creation of environmental problems by this industry. Wind direction, turbulent conditions and fluxes in the atmosphere near the earth's surface are among the most important atmospheric factors affecting the distribution pattern of air pollutants after leaving their emission sources. The purpose of this study is to model the spread of air pollution in a steel factory under prevailing wind conditions. Material and Methodology: Using meteorological data, prevailing wind conditions, annual and seasonal windrose were modeled by AERMET software. Suspended particles as the most important pollutant in the area of ​​the steel factory were sampled and then analyzed with using the AERMOD model, particle diffusion and dispersion modeling in two time periods of 24 hours and 6 days. Findings: The prevailing winds in this region are in the north, northwest, and southeast directions, and the highest amount of pollution is related to distances of 5000 to 20000 meters from the location of the chimneys and in the direction of the prevailing wind in the region. Also, the amount of air pollution caused by the factory chimney on a 24-hour time scale is lower than the clean air standard. Discussion and Conclusion: In this study, the effectiveness of the AERMOD model in the direction of better management and control of air pollutants and reduction of adverse effects on the environment is investigated, and appropriate solutions to reduce pollution are provided.

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