Akram Ghorbani; Mohammad javad Alipoor; Mohammad Ghafoori
Abstract
Background and Purpose: Distribution of heavy metals in all types of sediments is one of the important and new topics in environmental sedimentology. This study was conducted with the aim of investigating the amount of factor pollution, concentration of cadmium and lead metals, geochemical accumulation ...
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Background and Purpose: Distribution of heavy metals in all types of sediments is one of the important and new topics in environmental sedimentology. This study was conducted with the aim of investigating the amount of factor pollution, concentration of cadmium and lead metals, geochemical accumulation index and ecological risk category in the soil downstream of Taibad Landfill.materials and methods: 15 stations were selected at a distance of 100 meters from each other and along the waterway exiting the site from a distance of 100 to 1500 meters. After sampling 5 samples and repeating 3 times from each station, the samples were taken to the laboratory for analysis.Results: In stations 2 and 6, because the pollution factors (CF) are between 1 and 3, the level of pollution in these stations is average, in station 10 it is very high, and for the rest of the stations, because the pollution factors are between 3 and 6, the level of pollution is high. For cadmium metal, the pollution factor (CF) in all stations is between 3 and 6 and the pollution is high. Based on the results, the amount of lead and cadmium metals in the risk category They are ecologically average.Conclusion: The amount of lead metal pollution in station 2 and 6 is moderate, station 3 is very high and in other stations it is high. Cadmium metal contamination was reported in all stations. Both metals are in the medium category in terms of ecological risk.The concentration mentioned metals in the soil downstream of the landfill is significantly higher than the global soil average and the earth's crust. It seems that this pollution is caused by the landfill, which was spread to the downstream lands by seasonal runoff
Akram Ghorbani; Marjan Ziaee; Shabnam Hoshdar Tehrani; Mitra Mohammadi
Abstract
Background and Purpose: 80% of air pollution in urban areas comes fromheavy vehicles. The purpose of this study is to investigate the amount of CO2,CO, HC, NOX pollutants, types of diesel cars and their relationship with the lifeof the car.Materials and Methods: In this study, out of all diesel cars ...
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Background and Purpose: 80% of air pollution in urban areas comes fromheavy vehicles. The purpose of this study is to investigate the amount of CO2,CO, HC, NOX pollutants, types of diesel cars and their relationship with the lifeof the car.Materials and Methods: In this study, out of all diesel cars in Mashhad, whichis 5861 cars, 425 cars were randomly selected and after recording the year ofcar production, using OPTIMA7 NDIR five-gas pollutant device in bright enginemode (Engine operation). Sampling was performed continuously (except forthe first to the fourth of April) in the period of December 6, 2017 to May 9,2017 at nine to twelve and fifteen to twenty o’clock and Then, using SPSSsoftware and statistical tests. The relationship between these pollutants andvehicle life was investigated.Results: According to the amount of sig (p=0/531>0/05) between the life of thecar and carbon monoxide, the amount of sig (p=0/571>0/05) between the lifeof the car and the amount of hydrocarbon, the amount of sig (p=0/153>0/05)between the life of the car and carbon dioxide output and the amount ofp=0/290>0/05 (sig) there is no significant relationship between car life andnitrogen oxides.There is an inverse correlation between the car’s year of manufacture andCO2 and NOX pollutants, So that the higher the car’s year of manufacture,the lower the amount of carbon dioxide and nitrogen oxides. And there is apositive correlation between HC and CO pollutants.Conclusion: The significant level value (sig) between car life and all pollutantsis greater than 0.05, so there is no statistically significant relationship betweencar life and all exhaust gas pollution. Therefore, the amount of air pollution bydiesel cars should be reduced by taking correct management methods.
Akram Ghorbani; Farid Gholamreza Fahimi; Ahmad Tavana; Masood Kiadaliri
Abstract
One of the complications of transportation in cities is noise pollution caused by vehicles. Today, noise in urban environments is an important issue in the field of public health. Due to the negative effects of noise pollution on human health and well-being, it is necessary to identify and understand ...
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One of the complications of transportation in cities is noise pollution caused by vehicles. Today, noise in urban environments is an important issue in the field of public health. Due to the negative effects of noise pollution on human health and well-being, it is necessary to identify and understand these effects on the health of exposed people. In this study, the type of traffic axis composition of the highway was identified and the type of traffic information required was identified by identifying the locations for the sound station along the highway axis and preparing sound data and identifying the factors affecting sound propagation. At each sampling station, the required variables in the intervals of 7: 30-9: 30, 12: 30-14: 30, 18: 30-20: 30, 23: 30-1: 30 And 3: 30-5: 30 and different seasons of the year were measured and recorded for modeling. The results show that the comparison of the average parameters of noise pollution in different stations of Shahid Kalantari Highway at a significant level of 5% showed that the highest amount of noise and sound indicators measured are related to the first station of Abadgaran with the amount of deci, respectively. Bell is 79.61 dB, the entrance road to Kuhsangi is about 80 dB and the lowest station of Hafez Square is about 58 dB. The parameters Lmax, Leq, L10, L50 and L90 are visually uniform distribution of results in the fit line range. According to the results of this study, it is announced that in all seasons of the year, the average equivalent sound level in all stations studied is higher than the recommended daily ambient sound level in the Iranian open air sound standard. While the standard sound level in residential areas is 55 decibels during the day and 45 decibels at night.