Removal of Creosote from Soil by Thermal Desorption

摘要

Performance of the thermal desorption process for removal of organiccontaminants, mostly polynuclear aromatic hydrocarbons (PAHs), from soils was evaluated. A Superfund Site Soil that was contaminated with creosote was tested. An operating temperature of 550 C and an operating residence time of 10 minutes at temperature, determined from bench studies, were used in the pilot scale desorber. Test results showed that greater than 99% of the PAHs were removed from the test soil. The concentrations of total PAHs in the soil before and after treatment averaged 4629 mg/kg and below detection limits respectively.