Decreased Release of PAHs from Soils as a Result of Field Bioremediation
Publication: Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management
Volume 4, Issue 3
Abstract
In this study, the relationship between the release characteristics of contaminants from soil and the biodegradability of the contaminants was evaluated. The soils used were from a large-scale field site. A batch rate of release procedure was used to quantify the release of polynuclear aromatic hydrocarbons (PAHs) from manufactured gas plant site soils before and during bioremediation in a field land treatment unit (LTU). This evaluation assessed the performance of the field-scale LTU with respect to changes in the soil PAH concentrations and to changes in chemical release parameters. The practical implications of the evaluation are discussed. During 147 days of LTU operations, the concentrations of specific PAHs were reduced 39–93%. ROR studies were conducted on LTU soil samples obtained at Days 0, 58, 72, and 147 of treatment. As a result of 147 days of treatment in the LTU, the fraction of a PAH released rapidly (F) had decreased for 8 of 10 PAHs, and the value of k2 (the first-order rate constant describing slow release) had decreased for 5 of 10 PAHs. There were no increases in F or k2 for any of the PAHs as a result of treatment in the field LTU. The results indicated that (1) only a fraction of the total concentration of the individual PAHs in the LTU samples was readily available to be released from the soil; (2) the remainder was released at a much slower rate; and (3) the mass of PAH released from the LTU soils to the aqueous phase decreased considerably. In addition, the fraction of the chemical released rapidly (F) for the Day 0 soil sample provided a reasonable prediction of the extent of PAH loss during 147 days of biological treatment in the field LTU.
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References
1.
Berg, M. S., Loehr, R. C., and Webster, M. T. (1998). “Release of petroleum hydrocarbons from bioremediated soils.” J. Soil Contam., 7(6), 675–695.
2.
Berthouex, P. M., and Brown, L. C. (1994). Statistics for environmental engineers, Lewis, Boca Raton, Fla.
3.
Cornelissen, G., Rigterink, H., Ferdinandy, M. M. A., and Van Noort, P. C. M. (1998). “Rapidly desorbing fractions of PAHs in contaminated sediments as a predictor of the extent of bioremediation.” Envir. Sci. and Technol., 32(7), 966–970.
4.
Kelly, R. L., et al. (1997). “MGP-REM process in full-scale land farming application: Integrating low cost, innovative technology with risk-based cleanup.” Proc., Gas, Oil and Envir. Biotechnology Symp., Institute of Gas Technology, Lake Buena Vista, Fla.
5.
Linz, D. G., and Nakles, D. V., eds. (1997). Environmentally acceptable endpoints in soil: Risk-based approach to contaminated site management based on availability of chemicals in soil, American Academy of Environmental Engineers, Annapolis, Md.
6.
Loehr, R. C., and Webster, M. T. ( 1997a). “Effect of treatment on contaminant availability, mobility, and toxicity.” Chapter 2, Environmentally acceptable endpoints in soil: Risk-based approach to contaminated site management based on availability of chemicals in soil. D. G. Linz and D. V. Nakles, eds., American Academy of Environmental Engineers, Annapolis, Md.
7.
Loehr, R. C., and Webster, M. T. (1997b). “Changes in toxicity and mobility resulting from bioremediation processes.” Bioremediation J., 1(2), 149–163.
8.
Opdyke, D. R., and Loehr, R. C. (1999). “Statistical analysis of chemical release rates from soils.” J. Soil Contam., 8(5), 541–558.
9.
Williamson, D. G., Loehr, R. C., and Kimura, Y. (1998). “Release of chemicals from contaminated soils.” J. Soil Contam., 7(5), 543–558.
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Published In
Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management
Volume 4 • Issue 3 • July 2000
Pages: 118 - 125
History
Received: Mar 16, 2000
Published online: Jul 1, 2000
Published in print: Jul 2000
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