1
School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran.
2
School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran
Abstract
Uncontrolled release of light non aqueous phase liquids (LNAPL) such as diesel,gasoline, fuel oils and lubricating oils from transporting vehicles, pipeline andunderground storage tanks (UST) could lead to the migration of contaminants to thesubsurface soil and ground water. There is a high interfacial tension (IFT) betweenLNAPL molecules and water molecules that makes water a non-efficient cleaningmaterial for removing LNAPL from the soil. Nowadays, surfactants (surface activeagents) can promote the enhanced removal of LNAPL from the subsurface throughmobilization and solubilization. Encouraging results were achieved from laboratoryand field results. The aim of this study is to improve the clean up efficiency ofsurfactant-flooding for two different surfactants; Triton X-100 and Sodium DodecylSulfate which are known as mobilizing and solubilizing surfactants, respectively, byadding alkaline (increasing pH) and foam producing substances. It is shown here thatadding alkaline improves the performance of Triton X-100 in removing LNAPL fromthe contaminated soil by about 8 percent, but spoils the remediating capability ofSodium Dodecyl Sulfate by about 3 percent. Also, adding a foaming agent helps thesurfactant solution in removing the LNAPLs out of the soil by more than 5 percent.
Parnian,M. and Ayatollahi,S. (2008). Surfactant Remediation of LNAPL Contaminated Soil; Effects of adding alkaline and foam producing substances. Iranian Journal of Chemical Engineering (IJChE), 5(2), 34-44.
MLA
Parnian,M. , and Ayatollahi,S. . "Surfactant Remediation of LNAPL Contaminated Soil; Effects of adding alkaline and foam producing substances", Iranian Journal of Chemical Engineering (IJChE), 5, 2, 2008, 34-44.
HARVARD
Parnian M., Ayatollahi S. (2008). 'Surfactant Remediation of LNAPL Contaminated Soil; Effects of adding alkaline and foam producing substances', Iranian Journal of Chemical Engineering (IJChE), 5(2), pp. 34-44.
CHICAGO
M. Parnian and S. Ayatollahi, "Surfactant Remediation of LNAPL Contaminated Soil; Effects of adding alkaline and foam producing substances," Iranian Journal of Chemical Engineering (IJChE), 5 2 (2008): 34-44,
VANCOUVER
Parnian M., Ayatollahi S. Surfactant Remediation of LNAPL Contaminated Soil; Effects of adding alkaline and foam producing substances. IJChE, 2008; 5(2): 34-44.
