Feasibility of Amending Slurry Walls with Zero-Valent Iron
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 125, Issue 4
Abstract
Rapid degradation of aqueous trichloroethylene (TCE) was observed in batch experiments conducted with soil/bentonite slurry wall materials amended with the addition of zero-valent iron. The first-order TCE decay constants for soil/bentonite/iron mixtures, when normalized to the available iron surface area, were approximately 1–2 orders of magnitude higher than observed in batch experiments with pure iron systems. Permeability tests indicated an increase in SB hydraulic conductivity roughly proportional to the amount of iron added. Based on the observed reaction rates and the assumption of sustained long-term performance, significantly less than one percent added iron would be required to reduce the diffusive flux of TCE across an installed slurry wall by over 10 orders of magnitude. However, the release of hydrogen gas was noted as a potential problem for low permeability systems containing zero-valent iron.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Gillham, R. G., and O'Hannesin, S. F. ( 1994). “Enhanced degradation of halogenated aliphatics by zero-valent iron.” Ground Water, 32(6), 958–967.
2.
Johnson, T. L., Fish, W., Gorby, Y. A., and Tratnyek, P. G. ( 1998). “Degradation of carbon tetrachloride by iron metal: Complexation effects on the oxide surface.” J. Contaminant Hydro., 29(4), 377–396.
3.
Johnson, T. L., Sherer, M. M., and Tratnyek, P. G. ( 1996). “Kinetics of halogenated organic compound degradation by iron metal.” Envir. Sci. & Technol., 30(8), 2634–2640.
4.
Matheson, L. J., and Tratnyek, P. G. ( 1994). “Reductive dehalogenation of chlorinated methanes by iron metal.” Envir. Sci. & Technol., 28(12), 2045–2053.
5.
Mott, H. V., and Weber Jr., W. J. ( 1991). “Diffusion of organic contaminants through soil-bentonite cut-off barriers.” Res. J. Water Pollution Control Fedn., 63(2), 166–176.
6.
Orth, W. S., and Gillham, R. W. ( 1995). “Dechlorination of trichloroethene in aqueous solution using FE0.” Envir. Sci. & Technol., 30(1), 66–71.
7.
Powell, M. P., Puls, R. W., Hightower, S. K., and Sabatini, D. A. ( 1995). “Coupled corrosion and chromate reduction: Mechanisms for subsurface remediation.” Envir. Sci. & Technol., 29(8), 1913–1922.
8.
Rabideau, A. J., and Khandelwal, A.“Boundary conditions for modeling transport in vertical barriers.”J. Envir. Engrg., ASCE, 124(11), 1135– 1139.
9.
Shen, P. ( 1996). “Enhanced degradation of trichloroethylene in the presence of metallic iron and soil/smectites,” MS thesis, State University of New York at Buffalo, Buffalo, N.Y.
10.
Sivavec, T. M., Mackenzie, P. D., Horney, D. P., and Baghel, S. S. ( 1997). “Redox-active media for permeable reactive barriers.” Proc., 1997 Int. Containment Conf. and Exhibition, Florida State University, Tallahassee, Fla., 753–759.
11.
van Olphen, H., and Fripiat, J. J., eds. ( 1979). Data handbook for clay materials and other non-metallic minerals . Pergamon, Oxford, U.K.
Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 125 • Issue 4 • April 1999
Pages: 330 - 333
History
Published online: Apr 1, 1999
Published in print: Apr 1999
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.