Importance of phase behavior on the removal of residual DNAPLs from porous media by alcohol flooding

Brandes, David; Farley, Kevin J.

doi:10.2175/wer.65.7.9

Cited by 96 publications

(53 citation statements)

References 19 publications

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“…For example, remediation techniques for groundwater and soil contaminated by nonaqueous phase liquids (NAPLs), often employ surfactants to reduce surface tension and enhance mobilization of NAPLs [Mason and Kueper, 1996;Fortin et al, 1997], or employ cosolvents and humic substances to increase the solubility of slightly soluble NAPLs [Brandes and Farley, 1993;Li et al, 1996;Tatalovich et al, 2000]. Furthermore, bioremediation techniques employ bacteria that enhance contaminant degradation [Chaudhry, 1994].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of acoustically enhanced solute transport in porous media

Vogler

Chrysikopoulos

2002

Geophysical Research Letters

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[1] The effect of acoustic waves on the transport of a conservative tracer in a water saturated column packed with glass beads was investigated. It was observed from the experimental data that the addition of acoustic waves, in the frequency range between 60 to 245 Hz, to a steady background pressure gradient, enhances solute transport compared to the base case consisting of only a background pressure gradient. Furthermore, it was found that the effective velocity of the solute is approximately inversely proportional to the frequency of the acoustic wave.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation of acoustically enhanced solute transport in porous media

Vogler

Chrysikopoulos

2002

Geophysical Research Letters

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“…A number of laboratory studies have examined the dissolution and mobilization of NAPL by cosolvents (Luthy et al, 1992;Brandes and Farley, 1993;Luthy, 1993, 1994;Milazzo, 1993;Imhoff et al, 1995;Roy et al, 1995;Kueper, 1996, 1997). These studies have shown that NAPL may be effectively removed using cosolvents such as alcohols.…”

Section: In-situ Flushing Technologymentioning

confidence: 99%

Federal Integrated Biotreatment Research Consortium (FIBRC): Flask to Field Initiative

Bajpai¹,

Felt²,

Nestler³

et al. 2002

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“…A number of laboratory studies have examined the dissolution and mobilization of NAPLs by cosolvents [Luthy et al, 1992; Brandes and Farley, 1993;Luthy, 1993, 1994;Milazzo, 1993 …”

Section: Introductionmentioning

confidence: 99%

Field test of high molecular weight alcohol flushing for subsurface nonaqueous phase liquid remediation

Falta¹,

Lee²,

Brame³

et al. 1999

Water Resources Research

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Abstract. A pilot scale field test of non-aqueous phase liquid (NAPL) removal using high molecular weight alcohols was conducted at Operable Unit 1, Hill Air Force Base, Utah. Petroleum hydrocarbons and spent solvents were disposed of in chemical disposal pits at this site, and these materials are now present in the subsurface in the form of a light nonaqueous phase liquid (LNAPL). This LNAPL is a complex mixture of aromatic and aliphatic hydrocarbons, chlorinated solvents, and other compounds. The field experiment was performed in a 5 rn by 3 rn confined test cell, formed by driving interlocking sheet pile walls through the contaminated zone into an underlying clay. The test involved the injection and extraction of about four pore volumes (1 pore volume = 7000 L) of a mixture of 80% tert-butanol and 15% n-hexanol. The contaminants were removed by a combination of NAPL mobilization and enhanced dissolution, and the results of postflood soil coring indicate better than 90% removal of the more soluble contaminants (trichloroethane, toluene, ethylbenzene, xylenes, trimethylbenzene, naphthalene) and 70-80% removal of less soluble compounds (decane and undecane). The results of preflood and postflood NAPL partitioning tracer tests show nearly 80% removal of the total NAPL content from the test cell. The field data suggest that a somewhat higher level of removal could be achieved with a longer alcohol injection. IntroductionIt is now known that relatively small nonaqueous phase liquid (NAPL) source zones are capable of producing large contaminated groundwater plumes. While methods such as pumping and treating the contaminated water or funneling the water through reactive walls have been effective for plume control, they do not effectively address the source of the plume. Given that these source zones may continue to release contaminants for many decades or centuries, a large effort is now focused on the development of source zone removal methods. Often these techniques must be applied in situ, owing to the depth of contamination or to the presence of buildings and utilities which prevent excavation. The Rao et al. [1997] field test was performed in an isolated test cell, and it consisted of injecting about nine pore volumes of a 70% ethanol, 12% n-pentanol solution. They reported a bulk NAPL removal of -81%, with a higher removal efficiency for several individual compounds.

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Importance of phase behavior on the removal of residual DNAPLs from porous media by alcohol flooding

Cited by 96 publications

References 19 publications

Experimental investigation of acoustically enhanced solute transport in porous media

Experimental investigation of acoustically enhanced solute transport in porous media

Federal Integrated Biotreatment Research Consortium (FIBRC): Flask to Field Initiative

Field test of high molecular weight alcohol flushing for subsurface nonaqueous phase liquid remediation

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