@article{env20221023,
author={{Seyf-Laye, Alfa-Sika Mande and Ibrahim, Tchakala and Clement, Balogoun Kolawole and Venyo, Akpataku Kossitse and Moctar, Bawa Limam and Honghan, Chen},
title={Gasoline Removal from Silt Sandy Soils via in Situ Technologies with an Emphasis on Factors Influencing Soil Vapor Extraction},
journal={American Journal of Environmental Protection},
volume={10},
number={2},
pages={67--72},
year={2022},
url={http://pubs.sciepub.com/env/10/2/3},
issn={2328-7233},
abstract={Soil vapor extraction (SVE) is a common and typically effective physical treatment process for remediation of volatile contaminants in unsaturated soils. SVE process was evaluated in this study to determine its effectiveness for gasoline removal using column tests with real soils. This paper serves five main purposes: it evaluates the influence of air injection and air extraction, continuous and intermittent air extraction, initial concentration of gasoline, soil water content and air flow rate on SVE for gasoline removal from sandy soils. Comparison of injection methods indicated that extraction was more efficient when air introduced from the top of the column rather than the bottom. The initial concentration of gasoline in the soil had a significant effect on the rate of extraction and the overall removal of TPH, with reduced removal efficiency observed when the initial gasoline concentration increased. It was found that continuous air extraction has the highest efficiency for gasoline removal from sandy soils. Higher venting velocities led to more rapid removal of gasoline from sandy soil columns. In addition, increased soil moisture content led to faster gasoline extraction rates.  It was found that SVP has the highest efficiency for gasoline removal from sandy soils and can remediate the vadose zone effectively to meet the soil guideline values for protection of groundwater.},
doi={10.12691/env-10-2-3}
publisher={Science and Education Publishing}
}