ارزیابی خطر اکولولوژیکی و بهداشتی برخی فلزات سنگین در خاک کنار جاده‌ای شهر اهواز

Background and Aim: Heavy metals in the surface soils of cities caused by various sources (such as traffic, industrial emissions, erosion from buildings, etc.) can be accumulated through inhalation; ingestion and dermal contact in the human body and endanger human health. The purpose of this study is to evaluate the potential of ecological risk and human health risks of some heavy metals in roadside soil at the intersections of Ahvaz (Modares, Kharchar, Zargan, Behbahani, Golestan, Abadan, Khorramshahr, Susangerd and Andimeshk). Materials and Methods: In this study, the concentration of heavy metals in road surface roadside in intersections of Ahvaz in the summer of 1396 was investigated. The sampling at each intersection was carried out at specified intervals of 1, 10 and 30 meters on the sides of the main road (each intersection of 6 samples) from the surface soil (depth 0 to 20 cm), from which 54 samples were totally collected. Samples were dried at oven at 60 ° C after being transferred to the laboratory. After digestion with acid mixture, concentrations of heavy metals Zn, Pb, Ni, Cu, Cr, Cd and As were measured by inductive coupled plasma-mass spectrometry (ICP-MS). The contamination level was estimated based on potential ecological risk and human health risk of heavy metals Results: The average values of Zn, Pb, Ni, Cu, Cr, Cd and As were 116.61 ± 49.42, 284.02 ± 166.91, 25.53 ± 4.47, 220.63 ± 87.75, 137.21 ± 84.80, 3.44 ± 3.23 and 8.65 ± 3.8 mg/kg, respectively. Isotope ratios indicate that publications from automobile traffic and industrial publications are the most important sources of lead in the studied samples. The average value of potential ecological risk (RI) in Andimeshk, Golestan and Susangerd crossroads is of low risk; in Modarres, Behbahani and Zergan intersections, the average value of RI is of medium risk; and in Chaharsir, Abadan and Khorramshahr intersections is of significant risk. The risk of carcinogenesis (CR) in children is higher than adults. In both age groups, Cr has the highest risk of cancer. Conclusion: The results showed that the source of contamination of the metals studied was anthropogenic, including road traffic and industrial activities in the studied area.