Natural Stabilization of Stored Industrial Sludges
Publication: Journal of Environmental Engineering
Volume 129, Issue 3
Abstract
Current regulations governing the closure of a waste impoundment require either complete removal of the contained material or appropriate remediation of the material in the impoundment followed by application of a permitted cover to prevent exposure and off-site migration of residual chemicals. With the emergence of risk based corrective action decisions, there has been interest in other approaches that may be as protective as the more traditional impoundment closure approaches. This paper describes the extent to which natural ecological processes can result in the stabilization and sequestration of chemicals of concern, polynuclear aromatic hydrocarbons (PAHs). A field study in Texas offered the opportunity to evaluate the effectiveness of natural processes to reduce the mobility of PAH in impounded industrial sludges. Grasses, bushes, and trees had been growing on the surface of a sludge impoundment for years. Separate surface and subsurface samples were obtained from different locations in the impoundment. Analyses to determine PAH release and leachate data and relative toxicity data were used to assess the impact of natural processes. The results of these analyses indicated that the PAH in the surface samples were considerably less available than the PAH in the subsurface samples. The processes and factors associated with the natural conditions and growth of vegetation on the surface layers of this impoundment have resulted in the sequestration and stabilization of the PAH in the waste matrix. The reduced PAH availability in the surface layers indicates that the remaining PAH are likely to be a low risk to environmental receptors associated with this impoundment.
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References
ASTM. (1999). “ASTM standards on assessment and remediation of petroleum release sites.” Standard Nos. E-1599, E-1789, E-1912, and E-1943, West Conshohocken, Pa.
ASTM. (2000). “Standard guide for risk-based corrective action.” ASTM No. E2081-00.
American Public Health Association. (1995). “Standard methods for the examination of water and wastewater.” 19th Ed., Washington, D.C.
Aprill, W., and Sims, R. C.(1990). “Evaluation of the use of prairie grasses for stimulating polycyclic aromatic hydrocarbon treatment in soil.” Chemosphere, 20, 253–265.
Bates, D. M., and Watts, D. G. (1988). Nonlinear regression analysis and its applications, Wiley, New York.
Berg, M. S., Loehr, R. C., and Webster, M. T.(1998). “Release of petroleum hydrocarbons from bioremediated soils.” J. Soil Contaminat., 7, 675–695.
Chung, N., and Alexander, M.(1998). “Differences in sequestration and bioavailability of organic compounds aged in dissimilar soils.” Environ. Sci. Technol., 32, 855–860.
Cunningham, S. D., and Berti, W. R.(1993). “Remediation of contaminated soils with green plants; An overview.” In Vitro Cell Dev. Biol., 29P, 207–212.
Cunningham, S. D., Anderson, T. A., Schwab, A. P., and Hsu, F. C.(1996). “Phytoremediation of soils contaminated with organic pollutants.” Adv. Agron., 56, 55–114.
Donaldson, J. R., and Schnabel, R. B.(1987). “Computational experience with confidence regions and confidence intervals for nonlinear least squares.” Technometrics, 29, 67–82.
Ferro, A. M., Rock, S. A., Kennedy, J., Herrick, J. J., and Turner, D. L.(1999). “Phytoremediation of soils contaminated with wood preservatives: Greenhouse and field evaluations.” Int. J. Phytoremediat., 1, 289–306.
Fiorenza, S., C. L. Oubre, and C. H. Ward, eds. (2000). Phytoremediation of hydrocarbon-contaminated soil. CRC, Boca Raton, Fla.
Hutchinson, S. L., Schwab, A. P., and Banks, M. K.(2001). “Phytoremediation of aged petroleum sludge: Effect of irrigation techniques and scheduling.” J. Environ. Qual., 30, 1516–1522.
Loehr, R. C.(1999). “Environmentally protective endpoints: An important component of risk-based site remediation decisions.” Environ. Regulat. Permit., 9(2), 45–50.
Loehr, R. C., and Webster, M. T. (2000). “Decreased release of PAHs from soils as a result of field bioremediation.” Proc., ASCE Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management, July, 118–125.
Nam, K., Namhyun, C., and Alexander, M.(1998). “Relationship between organic matter content of soil and the sequestration of phenanthrene.” Environ. Sci. Technol., 32, 3785–3788.
Opdyke, D. R., and Loehr, R. C.(1999a). “Determination of chemical release rates from soils: Experimental design.” Environ. Sci. Technol., 33, 1193–1199.
Opdyke, D. R., and Loehr, R. C.(1999b). “Statistical analysis of chemical release rates from soils.” J. Soil Contaminat., 8, 541–558.
Qui, X., Leland, T. W., Shah, S. I., Sorensen, D. L., and Kendall, E. W. (1997). “Field study: Grass remediation for clay soil contaminated with polycyclic aromatic hydrocarbons.” Phytoremediation of Soil and Water Contaminants, E. L. Kruger, T. A. Anderson, and J. R. Coats, (Eds.) American Chemical Society, Symposium Series 664, 186–199.
Schnoor, J. L. (2002). “Phytoremediation of soil and groundwater, technology evaluation.” Rep. No. TE-02-01, Ground-water remediation technologies analysis center (GWRTAC), Pittsburgh.
Schwab, A. P., and Banks, M. K. (1994). “Biologically mediated dissipation of polyaromatic hydrocarbons in the root zone.” Bioremediation through rhizosphere technology, T. A. Anderson and J. R. Coats, Eds., American Chemical Society, Symposium Series 563, 132–141.
Seber, G. A. F., and Wild, C. J. (1989). Nonlinear regression, Wiley, New York.
Stroo, H. F., Jensen, R., Loehr, R. C., Nakles, D. V., Fairbrother, A., and Liban, C. B.(2000). “Environmentally acceptable endpoints for PAHs at a manufactured gas plant site.” Environ. Sci. Technol., 34, 3831–3836.
U.S. Environmental Protection Agency (1995). “Test methods for evaluating solid waste.” EPA No. SW-846, 3rd Ed. and updates, Washington, D.C.
U.S. Environmental Protection Agency (1999). “Phytoremediation resource guide. EPA No. 542-B-99-003, Solid Waste and Emergency Response, Washington, D.C.
Williamson, D. G., Loehr, R. C., and Kimura, Y.(1998). “Release of chemicals from contaminated soils.” J. Soil Contaminat., 7, 543–558.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 129 • Issue 3 • March 2003
Pages: 248 - 257
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Nov 7, 2001
Accepted: Feb 27, 2002
Published online: Feb 14, 2003
Published in print: Mar 2003
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