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Aquifer bioremediation

Other factors affecting performance include the presence of toxic material, the redox potential, salinity of the groundwater, light intensity, hydraulic conductivity of the soil, and osmotic potential. The rate of biological treatment is higher for more permeable soils or aquifers. Bioremediation is not applicable to soils with very low permeability, because it would take a long time for the cleanup process unless many more wells were installed, thus raising the cost. [Pg.714]

Aquifer bioremediation, defined, 3 758t Aquifer flow, 12 842 Aquifers, 12 838-839 Aquifer sparging, defined, 3 758t AraA [9-(P-D-arabinofuranosyl)-9H-purin-6-amine], 4 713 Arabidopsis, molecular genetics of cellulose biosynthesis, 5 366 Arabinanase, 10 300 Arabinans, classification by structure, 4 723t... [Pg.67]

Site Characteristics That Control Aquifer Bioremediation... [Pg.279]

Several important parameters control aquifer bioremediation projects. These include hydraulic conductivity, soil structure and stratification, groundwater mineral content, groundwater pH, temperature, microbial presence, and bench-scale testing, as further discussed below. [Pg.279]

Stormo, K. E. Crawford, R. L. (1993). Pentachlorophenol degradation by microencapsulated Flavobacteria and their enhanced survival for in situ aquifer bioremediation. In Applied Biotechnology for Site Remediation, ed. R. Hinchee et al., pp. 422—7. Boca Raton, FL Lewis Publishers. [Pg.11]

SalanitroJP, Chou C-S, Wiesniewsky HL, Vipond TE (1998) Perspectives on MTBE biodegradation and the potential for in situ aquifer bioremediation. In Southwestern Regional Conf Natural Ground Water Association, Anaheim, California. June 3-4, 1998, pp 40-54... [Pg.156]

Chaplin BP, Delin GN, Baker RJ, Lahvis MK. (2002). Long term evolution of biodegradation and volatilization rates in a crude oil contaminated aquifer. Bioremediation Journal 6 237-255. [Pg.532]

Bioremediation is also an option when spills of such compounds contaminate groundwater. For example, bioremediation seems a feasible treatment for aquifers contaminated with alkylpyridines (72) and phenol (73). [Pg.36]

Contaminants. The type and concentration of contaminants in an aquifer dictate what type of in situ bioremediation system, aerobic, anaerobic, or combination, ate the most effective. [Pg.170]

Istok JD, JM Senko, LR Krumholz, D Watson, MA Bogle, A Peacock, Y-J Chang, DC White (2004) In situ bioremediation of technetium and uranium in a nitrate-contaminated aquifer. Environ Sci Technol 38 468-475. [Pg.158]

Bradley PM, FH Chapelle (1995) Rapid toluene mineralization by aquifer microorganisms at Adak, Alaska implications for intrinsic bioremediation in cold environments. Environ Sci Technol 29 2778-2781. [Pg.229]

Dojka MA, P Hugenholtz, SK Haack, NR Pace (1998) Microbial diversity in a hydrocarbon- and chlorinated-solvent-contaminated aquifer undergoing intrinsic bioremediation. Appl Environ Microbiol 64 3869-3877. [Pg.634]

Hutchins SR, DE Miller, A Thomas (1998) Combined laboratory/field study on the use of nitrate for in situ bioremediation of a fuel-contaminated aquifer. Environ Sci Technol 32 1832-1840. [Pg.643]

Most contaminations of aquifers are a result of material being released above the saturated zone. The contaminant pumping method is limited to the cleanup of the saturated zone. Contaminants in the unsaturated zone can still be a source of future contamination. In situ bioremediation techniques can also be designed to clean up the unsaturated zone simultaneously. [Pg.718]

Where the terminal electron acceptor is not present initially in sufficient quantity, addition of oxygen for aerobic bioremediation can be as simple as bubbling air into the aquifer addition of electron acceptors for anaerobic bioremediation is more complex and can foster concerns regarding the toxicity and fate of the added material. [Pg.1017]

Bioremediation difficult to implement in low-permeability aquifers (hydraulic conductivity <10 4 cm/s). [Pg.1023]

The key factors that determine the effectiveness of bioremediation in aquifers are ... [Pg.278]

The location, distribution, and disposition of chemical contaminants in the aquifer can strongly influence the likelihood of success for bioremediation. This technology generally works well for dissolved contaminants and contaminants adsorbed onto higher-permeability sediments. However, if the majority of the contamination is trapped in lower-permeability sediments or outside the flow path, where it is in contact with nutrients and electrons acceptors, this technology will have reduced impact, or none at all. [Pg.279]

For general purposes, for aquifers with hydraulic conductivity greater than 1CH cm/s, bioremediation can be expected to be successful. Where the sites have lower hydraulic conductivities in the range of 1CH to 10 bioremediation can proceed, but at a slower rate and more management is required. Where the hydraulic conductivity is less than 10-6 cm/s, the success of biodegradation is less likely, unless procedures such as hydrofracking are used. [Pg.279]

Once a bioremediation effort is started, the bioreactions that occur in the presence of added electron acceptors will result in significant variations of water chemistry across the three-dimensional area of the aquifer. Careful monitoring of these variations is an important indicator of the effectiveness of the remediation process. [Pg.280]

Norris, R. D. and Dowd, K. D., 1993, In-Situ Bioremediation of Petroleum Hydrocarbon-Contaminated Soil and Groundwater in a Low-Permeability Aquifer In Bioremediation Field Experience (edited by R E. Flathman and D. E. Jerger), CRC Press, Boca Raton, FL. [Pg.289]


See other pages where Aquifer bioremediation is mentioned: [Pg.25]    [Pg.205]    [Pg.25]    [Pg.25]    [Pg.369]    [Pg.25]    [Pg.205]    [Pg.25]    [Pg.25]    [Pg.369]    [Pg.25]    [Pg.29]    [Pg.32]    [Pg.34]    [Pg.170]    [Pg.170]    [Pg.210]    [Pg.599]    [Pg.621]    [Pg.647]    [Pg.542]    [Pg.1019]    [Pg.1021]    [Pg.1023]    [Pg.266]    [Pg.271]    [Pg.276]    [Pg.277]    [Pg.278]    [Pg.405]   


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