Behnam Pardakti; Hossein Pirkharrati; Farrokh Asad Zadeh
Abstract
Background and Purpose: In this study, heavy metals in the soil around theZanjan city, by using indicators of pollution, carcinogenic and non-carcinogenicrisk and determining the origin by using statistical methods.Materials and Methods: In this study, 30 soil samples were taken from a depthof 0-20 cm ...
Read More
Background and Purpose: In this study, heavy metals in the soil around theZanjan city, by using indicators of pollution, carcinogenic and non-carcinogenicrisk and determining the origin by using statistical methods.Materials and Methods: In this study, 30 soil samples were taken from a depthof 0-20 cm and analyzed based on the method of acid digestion by inductioncoupled plasma spectroscopy.Results: The enrichment factor for zinc and cadmium was in the extremeenrichment category with an average of 42.1 and 34.5, respectively, and theland accumulation index for cadmium was in the high pollution category withan average of 2.8. Spatial changes of the index of pollution load and modifieddegree of pollution showed that the intensity of pollution increased nearthe industrial centers and the linear regression between the ecological riskand the median coefficient of the medium effect range (R2=0.903) showedthat 76% of the samples They are in the possibility of toxicity. Cadmium hadthe highest risk in children and adults with an average non-carcinogenic riskindex of 2 and 0.5, especially exposed to skin absorption with an average of0.5. It shows the risk of more cancer diseases. The result of determining theorigin and contribution of heavy metals with the help of statistical evaluationsshowed that lead, zinc and cadmium are the result of human activities andchromium, copper and arsenic are the result of the combination of human andearth-born activities. have gathered in the areaConclusion: In order to reduce the negative environmental effects of heavymetals in the soil of the study area, measures such as reducing the entry ofpollutants into the soil and refining polluted Soil.