Mostafa Abyareh; Farhad Nejadkoorki; Mohammad Reza Ekhtesasi; Mohammad Akhavan Ghalibaf
Abstract
Abstract Backound and purpose: The communities have been faced the environmental challenges by dust particles as an important part of air pollution that are emitted into the atmosphere every day by chimney of factories and power plants out. The aim of this study was to determine the quality and quantity ...
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Abstract Backound and purpose: The communities have been faced the environmental challenges by dust particles as an important part of air pollution that are emitted into the atmosphere every day by chimney of factories and power plants out. The aim of this study was to determine the quality and quantity of industrial dust around the Yazd Steel Company to control and supervise the industrial dust to make the better environmental condition. Materials and Methods: In this study, according to the wind direction, the falling dust particles, were collected and weighted in two sediment stations before and after the company from 1/2/2016 to 30/4/2016. The sampling was done by MDCO. Then, the taken samples transferred to an elemental analysis laboratory, and the amounts of dust-forming elements were measured by XRF device. Results. Based on the obtained results, the maximum and minimum levels of the concentrations of falling dust particles were 32.9g/m2 on March for,0.0014 g/m2 on February for SiO2 and SrO respectively. the major elements and chemical compounds of dust included: SiO2، CaO، CO2، Al2O3، MgO، Fe2O3، K2O، Na2O، SO3، TiO2، Cl، p < sub>2O5، MnO، ZnO، Pt، Au، SrO. . Conclusions: The results of statistical tests demonstrated that there was a significant difference between the amounts of these elements before and after the company. Therefore, proper management and more accurate monitoring are necessary to protect the environment in this industry
Mahsa Moein; Soolmaz Shamsaei; Zahra Khebri
Abstract
Background and amain: The most important global environmental problem, especially in large cities, is air pollution. This is regarded as a serious threat to human, society and environment health. This paper aims to investigate the physical factors of stack affecting the concentrations of the pollutants ...
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Background and amain: The most important global environmental problem, especially in large cities, is air pollution. This is regarded as a serious threat to human, society and environment health. This paper aims to investigate the physical factors of stack affecting the concentrations of the pollutants through the AERMOD model. Materials and Methods: In this research, modeling was carried out for four factories Orchin, Khayyam, Noavaran and Meybod Tile Company during the first six months of 2015. The study area comprised 20 × 20 km2., being centered on the Khayyam factory. Meybod meteorological data were used in the form of a three-hour mean status to perform the sub-model of AERMET. A Digital Elevation Model (DEM; SRTM 50 m) was used to perform the sub-model of AERMAP. In order to conduct the statistical analyses, the SPSS software program (Version 22) was used. Results: The results of the statistical analyses showed that the abovementioned factories had significant differences in terms of dispersion of particles: The Noavaran Factory and Meybod Tile Company had the maximum and minimum concentrations respectively. Finally, the model was verified by measuring 23 points in different months with an environmental device. According to the obtained results, the correlation results, the results of the model, and the samples areas were confirmed with P-value=0.002. Conclusion: According to the results of Freidman ranking, the physical factors of the factories affecting the concentration of the particles in order of priority were the stack diameter, the exit rate of suspended particles, the exit speed of the particles, the height of the stack, the temperature of the stack, and the receiver’s height.