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 ...
Read More
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.
Majid Kermani; sevda fallah jokandan; Mina Aghaei; Mohsen dowlati
Abstract
Background & Objective : Air pollution is considered as one of the the most important risks of uncontrolled growth of cities, economic development and energy consumption in the last century. In large cities, such an increasing trend seriously threatens the health of residents. This study aims to ...
Read More
Background & Objective : Air pollution is considered as one of the the most important risks of uncontrolled growth of cities, economic development and energy consumption in the last century. In large cities, such an increasing trend seriously threatens the health of residents. This study aims to evaluate the health effects of PM10, PM2.5 and SO2, and estimate the mortality and morbidity rate of cardiovascular, respiratory and Chronic obstructive pulmonary, attributed to the aforementioned pollutants, using AirQ model in metropolis of Tehran in 1392. Materials & Methods: In this cross-sectional study, Data required were collected from environmental protection organization and air quality control center of Tehran. These data were analyzed by Excel, and the processed data entered AirQ model. Then relative risk, basis risk and attributable fraction were estimated. Finally, the gained results, being mortality and morbidity rate, were presented in tables and graphs. Results: The results showed that the average annual concentration of PM10, PM2.5 and SO2, were 73, 43 and 41 μg/m3, respectively, being 3.65, 4.3 and 2.05 times higher than the national standard of Iran and WHO guidelines, correspondingly. Total number of mortalities attributed to the PM10, PM2.5 and SO2, were about 2187, 2842 and 721, respectively, being 3.65%, 4.75% and 1.20% of total deaths of Tehran city (except accidents), correspondingly. Conclusion: The results showed the health effects of particulate matter and sulfur dioxide pollutants, including total mortality, cardiovascular mortality, respiratory, hospitalizations due to chronic obstructive pulmonary disease and myocardial infarction in Tehran. So, it’s obviously clear that the proportion of mentioned pollutants are being increased in Tehran’s atmosphere that requires more attention of officials and experts to control air pollution.