The Impact of Environmental Pollution on Oil-Contaminated Soil Properties and Its Improvement Using Biodiesel in the Dora Refinery Area

In this research, oil-polluted soil in the vicinity of the Dora refinery was focused on.Soil samples were collected at appropriate depths and analyzed for their physical and chemical properties to determine the degree of pollution.The analyses included pH, organic matter content, electrical conductivity, bulk density, moisture content, and soil texture measurements.GC-MS was utilized for the identification of petroleum organic compounds.Used cooking oil was utilized to produce biodiesel, which was subsequently applied to the contaminated soil at a 10% by weight.Corn seedlings (Zea mays) were subsequently sown in treated and untreated soils, and growth parameters-height, number of leaves, and dry biomass-were quantified.The results indicated significant improvements in soil quality and plant growth in treated soil compared to untreated soil, showing the efficiency of biodiesel as an environmentally friendly bioremediation process for enhancing oil-contaminated soil quality and promoting plant growth.