Browse > Article

Enhanced Removal of Benzene-NAPL in Soil using Concurrent Injection of Cosolvent and Air  

Song, Chung-Hyun (Department of Environmental Engineering, Kunsan National University)
Jeong, Seung-Woo (Department of Environmental Engineering, Kunsan National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.30, no.11, 2008 , pp. 1095-1101 More about this Journal
Abstract
Nonaqueous phase liquids (NAPL) are the continuous source for soil and groundwater contamination. The first objective of the study was to verify the effect of co-injection of cosolvent and air on NAPL removal from soil-column system. The second objective of the study was to investigate the effect of alcohol-partitioning property on the NAPL removal by the co-injection process of cosolvent and air. Enhanced removal of benzene-NAPL by the co-injection process of ethanol and air was also verified within the soilcolumn system. However, the co-injection process of Tert-butanol (TBA) and air showed no enhancement of benzene-NAPL removal. This study found that the viscous pressure of TBA was so higher than the capillary pressure and TBA easily displaced the benzene-NAPL and air present in soil pores. Air of the coinjection process did not work for NAPL removal but hindered NAPL mobilization. NAPL partitioning property and viscous pressure of cosovlent should be considered for application of the co-injection process of cosolvent and air.
Keywords
NAPL; Cosolvent; Viscosity; Air;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Lunn, Stuard R. D. and Kueper, Bernard H., "Removal of pooled dense, nonaqueous phase liquid from saturated porous media using upward gradient alcohol floods," Water Resour. Res., 33, 2207-2219(1997)   DOI   ScienceOn
2 Jeong, S. W., Wood, A. Lynn, and Lee, Tony R., "Enhanced contact of cosolvent and DNAPL in porous media by concurrent injection of cosolvent and air," Environ. Sci. Technol., 36, 5238-5244(2002)   DOI   ScienceOn
3 Jeong, S. W., Wood, A Lynn, and Lee, Tony R., "Enhanced removal of DNAPL trapped in porous media using simultaneous injection of cosolvent with air: influencing factors and removal mechanisms," J. Hazard. Mater., 101, 109-122(2003)   DOI   ScienceOn
4 Hofstee, C., Ziegler, C. Gutierrez, Trotschler, O., and Braun, J., "Removal of DNAPL contamination from the saturated zone by the combined effect of vertical upward flushing and density reduction," J. Contam. Hydrol., 67, 61-78(2003)   DOI   ScienceOn
5 Hayden, N. J., Diebold, J., and Noyes, G., "Phase behavior of chlorinated solvent + water + alcohol mixtures with application to alcohol flushing," J. Chem. Eng. Data., 44, 1085-1090(1999)   DOI   ScienceOn
6 Ali, S. M. Farouq and Stahl, C. D., "Application of ternary phase diagrams to miscible displacement," Prod. Mon., 17, 2-8(1963)
7 Ayirala, Subhash C. and Rao, Danina N., "Solubility, miscibility and their relation to interfacial tension in ternary liquid systems," Fluid Phase Equilibria, 249, 82-91(2006)   DOI   ScienceOn
8 Jeong, S. W. and Corapcioglu, M. Yavuz, "Force analysis visualization of NAPL removal during surfactant-related floods in a porous medium," J. Hazard. Mater., A126, 8-13(2005)
9 Jawitz, James W., Sillan, Randall K., Annable, Michael D., Rao, P. Suresh C., and Warner, Kevin, "In-situ alcohol flushing of a DNAPL source zone at a dry cleaner site," Environ. Sci. Technol., 34, 3722-3729(2000)   DOI   ScienceOn
10 Brandes, David and Farley, Kevin J., "Importance of phase behavior on the removal of residual DNAPLs from porous media by alcohol flooding," Water Environ. Res., 65, 869-878(1993)   DOI
11 송충현, 정승우, 이병진, 고성환, "Cosolvent에 의한 토양내 Benzene-NAPL 세정 연구," 지하수토양환경, 13(3), 45-51(2008)   과학기술학회마을
12 U. S. EPA, Treatment Technologies for Site Cleanup: annual status report, 11th ed., U. S. EPA, pp. 4-8(2004)
13 Imhoff, Paul T., Gleyzer, Simon N., McBride, John F., Vancho, Laura A., Okuda, Itaru, and Miller, Cass T., "Cosolvent-enhanced remediation of residual dense nonaqueous phase liquids: experimental investigation," Environ. Sci. Technol., 29, 1966-1976(1995)   DOI   ScienceOn