Study on selected species with date palm on decrease pollution in oil-contaminated soil by phytoremediation

High concentrations of oil pollutants in soil vast addition to the effects of regional ecosystem, the uptake of these pollutants by plants and are entering the food chain can cause different disease for humans and other organisms. This also can create pollutants in ground water and causes problems for human health and the environment. Due to the importance of subject studies towards refining oil compounds from soil is essential. Different methods for refining contaminated soils are mainly very expensive and costly, and because using low cost methods for removing contaminated soil contamination can use refinement and optimization of these lands to help. One low-cost method for refining contaminated soils using plants (Phytoremediation). Phytoremediation has lower cost, compatible with nature and require fewer facilities than other methods of refining. The Gulf war and oil wells caused pollution in the soil in Khuzestan province, In order to study possibility of using plants for refining oil contaminants infected date palm orchards we carried out an experimental statistical randomized completely block design with 2 soil (soil without pollution, soil completely contaminated), 4 plants (control, alfalfa, corn and sunflower) and 3 replications. Treatments were: 1- planting date palm in soil without pollution 2- planting date palm and corn in soil without pollution 3- date palm and corn in soil without pollution 4- planting date palm and sunflower in soil without pollution 5- planting date palm in contaminated soil 6- planting date palm and corn in contaminated soil 7- planting date palm and alfalfa in soil contaminated 8- planting date and sunflower in soil contaminated. Total weight of seedlings in different treatments and palm seedling harvested and total, shoot, root weight in different treatments was measured, concentration of TPH in the contaminated soil were analyzed. Data analysed with spss 16 software and mean comparison was done with Duncan test. The results showed that significant differences between treatments. Alfalfa larger amounts of oil more than corn and sunflower soil was removed.