| Abstract [eng] |
This study investigated the potential of ozonation for treating petroleum-contaminated soils. Samples of Anykščiai sand and SiO2 (a by-product) were examined. The effectiveness of ozonation in treating petroleum-contaminated water was established, but it was shown that it requires a closed system or low gas flow with high ozone concentration. Ozonation of the oil-water bilayer resulted in increased hydrogen sulphide concentrationin water, indicating degradation of petroleum products. FTIR spectroscopy proved useful in studying ozonation remediation of contaminated soils. The results showed a decrease in absorption bands for alkanes and carbohydrates in the sand samples after ozonation, suggesting partial removal of contamination. SEM and BET analyses concluded that successful soil remediation through ozonation requires large soil particles (>10-15 µm) contaminated with diesel particulate matter. TG/DTG/DSC analyses of Anykščiai sand mixed with PM were conducted before and after ozonation. The results confirmed successful saturation of the sand with KD, but not of the factory sand with SD and KD. Mass reduction indicated partial clean-up of the KD after ozonation. However, thermal analysis revealed that ozonation is ineffective for removing SD pollutants from the Anykščiai sand. |
