Study of Contamination of some Heavy Metals in Soils Around Khouzestan Oxin Steel Complex using Contamination Indices

Today, with the advencement of technology and the development of industries, the level of soil polution by heavy metals has expanded day by day.the aim of thise study was to investigate the indices of Contamination factor, enrichment and Modified Degree of Contamination elements in the around soil of Oxine steel complex in Khouzestan. for this purpose,6surface soil samples were compounded. The around as well as the distances of 100, 200, 300, 400 and 500 meters from the complex were collected. After chemical preparation and digestion of the samples, the concentration of Lead, Nickle, Chromium, Zinc and Iron in them was measured by atomic absorption spectrometer. Based on the results of this study, the mean concentration of Lead, Zinc, Iron, Chromium and Nickel elements were 87.16, 519.97, 32873.73, 1118.40, 34.44 mg/kg respectively obtained. Also, the concentration of all the studied elemnts decreased with increasing distance from the complex, so that the highest concentration of metals in the vicinity and the lowest rate were obtained at a distance of 500 meters from the complex. The interpretation of Contamination indices was Iron<Nickel<Chromium<Lead<Zinc, respectively. Zinc and Lead matals have been introduced as the most important elements of Oxin complex and soil area was known towards non-contaminated iron metal.