پديد آورندگان :
cheraghi ، mahboobe Islamic Azad University Ahvaz Branch - Department of Environmental Engineering , karbasi ، Abdolreda University of Tehran - Graduate Faculty of Environment , Monavari ، Seyed Masoud Islamic Azad University Science and Research Branch - Faculty of Environment and Energy - Department of Environmental Science , Baghvand ، Akbar University of Tehran - Faculty of Environment
چكيده فارسي :
The aim of this study is to evaluate heavy metal pollution in the soil of Ahwaz oil field which is the biggest oil field in Iran, by using chemical dissociation process and Dendrogram interpretation and pollution severity index. The 20 stations were selected on the soil surface. Parameters of nickel, vanadium, cobalt, iron, chromium, barium, arsenic and total petroleum hydrocarbons concentrations were determined. Five step process of chemical dissociation method was used to identify and determine human made and natural heavy metals concentration, and also MVSP software was used to draw the cluster analysis dendrogram. The results of chemical dissociation show that the origin of the nickel, vanadium and cobalt elements and also of iron, chromium and arsenic in new wells is higher in the human made and the natural phase, respectively. The results of pollution severity index for nickel showed that 25% of the stations in clean class, 50% in low pollution class and 25% are in middle pollution class. 40% of the stations in terms of vanadium pollution in clean class, 40% in low pollution class and 20% are in middle pollution class. In terms of cobalt pollution, 35% of the stations in the clean class, 40% in low pollution class, 20% in the middle pollution class and 5% are in the high pollution class. In terms of chromium pollution, 75% of the stations in the clean class, 25% are in low pollution class and also for iron and arsenic all the stations are in the clean class.
