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<p>Hormozgan Steel Complex (HOSCO) in IRAN has 4 stacks that are installed on the electric arc furnace and cause the release of pollutants. this study aimed to model the dispersion of emitted CO, NO<sub>2</sub>, and PM<sub>10</sub> from stacks in HOSCO and identify the role of inversions in the dispersion of these pollutants. Pollutants emission rate were determined based on the collected data after measuring concentrations in the station (stacks) and across different distances from it for winter and summer. Hourly meteorological data from the on-site and Web GIS topography in the AERMOD was used to predicting of pollutants. The pollutants release pattern was simulated, and annual pollutant concentrations in average periods of 1–8&#xa0;h and 24-hr were predicted using AERMOD. The results of Wind rose plot showed that the prevailing annually wind is SE. Inversions are of the radiative in the winter that its base is at a height of 50&#xa0;m, but are of the subsidence in the summer that its base is at 500&#xa0;m. Therefore, in the winter, the ambient is very polluted compared to the summer. The max of PM<sub>10</sub>, NO<sub>2</sub>, and CO in the 24, 1, and 8-hr were 25, 86, and 35 ug/m<sup>3</sup> respectively, which accumulated on the slopes of the northwest cliffs of the site. But in winter, the core of maximum pollutants is shifted to the East. Therefore, it can be concluded that in winter, as pollutants ambient move to Bandar Abbas on the near of surface earth, and the risk of health is high.</p>

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Effect of inversion on pollutant dispersion of the steel factory

  • 期刊论文

  • 发表日期：

    2025年6月7日

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  • Alireza Adimi,
  • Ahmad Nohegar,
  • Zeinab Sazvar,
  • Mahmoud Behrouzi

摘要

Hormozgan Steel Complex (HOSCO) in IRAN has 4 stacks that are installed on the electric arc furnace and cause the release of pollutants. this study aimed to model the dispersion of emitted CO, NO2, and PM10 from stacks in HOSCO and identify the role of inversions in the dispersion of these pollutants. Pollutants emission rate were determined based on the collected data after measuring concentrations in the station (stacks) and across different distances from it for winter and summer. Hourly meteorological data from the on-site and Web GIS topography in the AERMOD was used to predicting of pollutants. The pollutants release pattern was simulated, and annual pollutant concentrations in average periods of 1–8 h and 24-hr were predicted using AERMOD. The results of Wind rose plot showed that the prevailing annually wind is SE. Inversions are of the radiative in the winter that its base is at a height of 50 m, but are of the subsidence in the summer that its base is at 500 m. Therefore, in the winter, the ambient is very polluted compared to the summer. The max of PM10, NO2, and CO in the 24, 1, and 8-hr were 25, 86, and 35 ug/m3 respectively, which accumulated on the slopes of the northwest cliffs of the site. But in winter, the core of maximum pollutants is shifted to the East. Therefore, it can be concluded that in winter, as pollutants ambient move to Bandar Abbas on the near of surface earth, and the risk of health is high.