ENHANCED BIODEGRADATION OF NON-AQUEOUS PHASE LIQUIDS USING SURFACTANT ENHANCED IN-SITU CHEMICAL OXIDATION
First Claim
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1. A method for reducing the concentration of a contaminant in a subsurface to a predetermined level, comprising:
- introducing a primary oxidant and a surfactant and/or a cosolvent into the subsurface;
the surfactant solubilizing or desorbing the contaminant;
the primary oxidant oxidizing the solubilized contaminant in the subsurface to a biodegradable compound; and
a microorganism in the subsurface biodegrading the biodegradable compound, so that the concentration of the contaminant in the subsurface is reduced to the predetermined level.
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Abstract
A method for in-situ reduction of contaminants in soil that uses chemical oxidation and biodegradation.
130 Citations
59 Claims
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1. A method for reducing the concentration of a contaminant in a subsurface to a predetermined level, comprising:
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introducing a primary oxidant and a surfactant and/or a cosolvent into the subsurface; the surfactant solubilizing or desorbing the contaminant; the primary oxidant oxidizing the solubilized contaminant in the subsurface to a biodegradable compound; and a microorganism in the subsurface biodegrading the biodegradable compound, so that the concentration of the contaminant in the subsurface is reduced to the predetermined level. - View Dependent Claims (3, 4, 5, 7, 9, 12, 14, 17, 19, 22, 23, 26, 27, 28, 30, 31, 33, 36, 38, 40, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55)
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2. (canceled)
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6. (canceled)
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10-11. -11. (canceled)
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13. (canceled)
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15-16. -16. (canceled)
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20-21. -21. (canceled)
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24-25. -25. (canceled)
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29. (canceled)
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32. (canceled)
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34-35. -35. (canceled)
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37. (canceled)
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39. (canceled)
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41-42. -42. (canceled)
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50. (canceled)
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56. A method of designing a procedure for reducing the concentration of a contaminant at a site in a subsurface, comprising:
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obtaining a sample representative of the contaminated site of interest; testing the sample with various concentrations of primary oxidant, surfactant, and/or cosolvent under various conditions of temperature, pressure, and/or flow rate; determining the rate of mobilization of the contaminant under the various concentrations and conditions; determining the rate of biodegradation of the contaminant under the various concentrations and conditions; and identifying an optimum set of concentrations and conditions for reducing the concentration of the contaminant at the site in the subsurface, wherein the representative sample is selected from the group consisting of a core sample taken from the subsurface of the site and a simulated sample comprising soil similar to that of the subsurface of the site spiked with contaminant.
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57. (canceled)
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58. A system for reducing the concentration of a contaminant at a site in a subsurface, comprising:
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an injection well; an injection fluid injection system fluidly connected to the injection well; an injection fluid comprising a primary oxidant and a surfactant and/or a cosolvent, the system being operable to promote biodegradation of the contaminant. - View Dependent Claims (59)
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Specification