| Soils in many petroleum-related sites have been contaminated with petroleum products due to various activities in energy industries. In this study, electromagnetic-vibration-enhanced air stripping method was proposed, and many related factors, such as soil type and air injection pressure were systematically investigated through bench-scale experiments.; A 24 full factorial design was implemented for the experiments that involved four factors (two levels for each). The main factors that had significant effects on the toluene removal were identified. A response surface model was then formulated based on the factorial analysis results, reflecting interrelationships between the system conditions and the toluene adsorption rate.; Continuous air injection experiments were also conducted to examine the fate of benzene, toluene, ethylbenzene and (m + p)-xylene (BTEX) in different enhancement tests. The effects of soil type, soil moisture, contaminant type and adsorption duration were investigated.; The electromagnetic-vibration-enhanced air stripping experiments were conducted to compare efficiencies of different enhancement tests in improving toluene removal. The effects of soil type, contaminant concentration and air injection pressure on toluene recovery were studied. (Abstract shortened by UMI.)... |
