| چکیده انگلیسی مقاله |
To investigate the enviromental geochemistry of potentially toxic elements (PTEs) in urban and agricultural soils of Islamshahr, south of Tehran, 21 top soil samples were collected and the total concentrations of PTEs were measured by an ICP-OES device. The obtained data were analyzed through the calculation of geochemical indices and the application of statistical methods. Based on the average values of the enrichment factor, geoaccumulation index, single factor index, Nemerow integrated pollution index (NIPI) and potential ecological risk index (PERI), the studied soil samples are polluted with Cd, Pb, Zn and Mn. The statistical analyses indicate that Cr, Ni, Fe, Zn, Cu, Cd and Pb originate from anthropogenic activities (e.g., industrial activities, traffic, urban and industrial waste disposal sites). Human health risk assessment shows the non-carcinogenic risk of Pb through ingestion for children in some sampling stations. The carcinogenic risk of Cr and Ni in the soils of the study area is higher than the acceptable value (1×10-4) for children through the ingestion route. The results of this study highlight the necessity of environmental management of human activities (traffic, agriculture, and industries) to reduce the negative consequences of potentially toxic elements intake by residents of the study area.
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