Mahdi Saghafi; Ali Hajiabdollahi Mamaghani
Abstract
Background and purpose: The objective of this study is to simulate the release of pollutant gases from the chimney of the Tabriz thermal power plant to ascertain the concentration of these pollutants in the vicinity of the power plant. Materials and Methods: The dispersion of pollutants emitted ...
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Background and purpose: The objective of this study is to simulate the release of pollutant gases from the chimney of the Tabriz thermal power plant to ascertain the concentration of these pollutants in the vicinity of the power plant. Materials and Methods: The dispersion of pollutants emitted by the Tabriz thermal power plant is modeled using AERMOD software to analyze the concentrations of sulfur dioxide and nitrogen dioxide in nearby areas and neighboring cities within a 44.85 km square. The data utilized for this modeling encompass one-year meteorological records, emission source particulars, and geographical data. This modeling calculated the distribution pattern of pollution and pollutant concentrations on the ground surface near the Tabriz thermal power plant for intervals of 1, 3, and 24 hours, as well as the annual average. Results: The calculated results reveal that the maximum concentrations of nitrogen dioxide in the studied area, for intervals of 1, 3, and 24 hours, and the annual average are 957, 510, 135, and 5.21 micrograms per cubic meter, respectively. Similarly, the maximum concentrations of sulfur dioxide, for the same intervals, are 3998, 2208, 584, and 22.6 micrograms per cubic meter, respectively. Conclusion: The findings indicate that the maximum concentrations of sulfur dioxide and nitrogen dioxide in certain densely populated residential zones exceed the permissible limits set by environmental standards for specific criteria. Consequently, the health of residents near this power plant could be at risk.
Arezoo Tavakoli
Abstract
Background and Aim: Air quality in indoor environments such as shopping places is affected by vehicles, in consequence of vicinity with streets and overcrowding. Despite the effect of air pollutants on community health, less attention has been paid to air pollution in traditional bazaars with natural ...
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Background and Aim: Air quality in indoor environments such as shopping places is affected by vehicles, in consequence of vicinity with streets and overcrowding. Despite the effect of air pollutants on community health, less attention has been paid to air pollution in traditional bazaars with natural ventilation. The aim of this study is to evaluate concentration of some air pollutants in three traditional bazaars (Sarai-e-Mokhles, Ghanadiha and Ghahvehkashiha) in Isfahan, placed at the Naqsh-e-Jahan Square. Materials and methods: The concentration of SO2, NO2, O3, Particulate Matters (PM2.5 & PM10) were determined by Aeroqual S500 using a direct assay method. The population of fungi and bacterial were determined by Flite 3 sampling pump (SKC) during a nine-month period from autumn 2018 to spring 2019. Results: Based on results, the pollutant concentrations were much higher at the end of the weeks. In all stations, O3 concentration was close to zero but the concentrations of SO2, NO2, PM2.5 and PM10 demonstrated higher concentrations than that of the standards. The air quality in Sarai-e-Mokhles and Ghanadiha are more critical than Ghahvehkashiha. The gram-positive Bacillus and Penicillium sp were the most population of bacteria and fungi, respectively. Conclusion: The lack of a ventilation system, various occupational activities, as well as the traffic of motorcycles increased the concentration of pollutants in the bazaars. Based on the long-term presence of market shopkeepers and high people density, it is necessary to pay more attention to air quality and to provide solutions to reduce air pollutant concentrations.