REMEDIASI TUMPAHAN MINYAK MENGGUNAKAN METODE SOIL WASHING DENGAN OPTIMASI KONDISI REAKSI

Abstract

The development of physicochemical process, Soil Washing, is still seldom applicated in every company especially in Indonesia. Usually they still use biological process. Leaching process is one of alternative treatment that can be applicated economically because it doesn’t need additional energy. This process used a surfactant Tween80 as Leaching Agent for TPH removal. The used reactor, leaching column based on plexyglass which had a height of 100 cm and a diameter of 6cm. Measurements were performed by varying the concentration of surfactant and Distribution Coefficient (Kd). It was known that the content of the initial TPH in soil characteristics, namely light oil (sand) 2.34%, heavy oil (loam) 1.61% and light oil (sandy loam) 4.48%. The optimum of concentrations for light oil (sand), heavy oil (loam), light oil (sandy loam) are 1.5%; 0% dan 0.5%. Based on the result of Distribution Coefficient (Kd) after Soil Washing process was known that the optimum Kd was Sand (light oil) 110,382, loam (heavy oil) 27,183 and sandy loam (light oil) 10.230. Percentage of leached Soil COD in light oil (sand), heavy oil (loam), light oil (sandy loam) were 74.8%; 63% and 45%. Then, TPH measurement result left in the soil are heavy oil (loam) 5009.2 mg/Kg, light oil (sandy loam) 24,490 mg/Kg and light oil (sand) 8704.4 mg/Kg.