Seyed Reza Karimi; Nabiollah Mansouri; Lobat Taghavi; Mazaher Moeinaddini
Abstract
Background and Aim: This study aimed to measure heavy metal concentration in the suspended particles which compare it in five different land uses in district 21 of Tehran.Materials and Methods: The procedure was performed based on the ASTM D4096 and EPA standards. The sampling was performed using a high-volume ...
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Background and Aim: This study aimed to measure heavy metal concentration in the suspended particles which compare it in five different land uses in district 21 of Tehran.Materials and Methods: The procedure was performed based on the ASTM D4096 and EPA standards. The sampling was performed using a high-volume pump for 20 minutes. The sampling was done every six days from five stations in district 21 in the spring of 2021. A total of 20 active samples of total airborne particles were collected from the residential, semi-residential, industrial, semi-industrial, and park stations. The airborne particle concentration was analyzed by the gravimetric method, and heavy metals were attached to particles using the ICP-OES. Descriptive tests of SPSS statistical software were used to analyze the data.Results: The results show that the lowest concentration of TSP is in the residential station with 42.34 µg/m3 and the highest concentration is in the industrial station with 253.30 µg/m3. In all applications except the park station, the aluminum has the highest concentration, and the lithium has the lowest concentration. The average concentration of the heavy metals in district 21 is an increasing trend of Al> Cr> Zn> Fe> Mg> Sr> Ti> W> Pb> Li, respectively.Conclusion: The heavy metals in the airborne particles of district 21 have a high concentration and diversity. The factors affecting pollution in the study area include the resources, such as the industries, airports, and light vehicles.