In situ water and soil remediation method and system
First Claim
Patent Images
1. A method for remediating a contaminated site comprising the steps of:
- introducing a first compound into a site containing ground water and soil having a hydrocarbon contaminant therein, the site essentially chemically untreated prior to the first compound introduction;
permitting the first compound to diffuse through the site;
introducing a second compound into the site, the second compound comprising an oxidizing agent reactable with the first compound to release a free radical;
permitting the first and the second compounds to react to release a free radical; and
permitting the free radical to act upon a site contaminant to form an environmentally neutral species.
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Abstract
The remediation treatment creates environmentally neutral species from hydrocarbon contaminants. A catalyst is injected into the site and is permitted to diffuse through the site. An oxidizing agent is then introduced into the site to release a free radical in a Fenton-type reaction. The compounds react to release a free radical, which acts upon the contaminants to form environmentally neutral species. Diffusion of both compounds is aided by turbulence induced in the groundwater. Reaction vapors are collected above ground, filtered, and vented to the atmosphere.
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Citations
35 Claims
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1. A method for remediating a contaminated site comprising the steps of:
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introducing a first compound into a site containing ground water and soil having a hydrocarbon contaminant therein, the site essentially chemically untreated prior to the first compound introduction; permitting the first compound to diffuse through the site; introducing a second compound into the site, the second compound comprising an oxidizing agent reactable with the first compound to release a free radical; permitting the first and the second compounds to react to release a free radical; and permitting the free radical to act upon a site contaminant to form an environmentally neutral species. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for remediating a contaminated site comprising the steps of:
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introducing a first compound into a site containing ground water and soil having a hydrocarbon contaminant therein; permitting the first compound to diffuse through the site; introducing a second compound into the site, the second compound comprising an oxidizing agent reactable with the first compound to release a free radical; during the first and the second compound introducing steps, causing turbulence in the ground water to facilitate dispersion of the first and the second compound throughout the site; permitting the first and the second compounds to react to release a free radical; permitting the free radical to act upon a site contaminant to form an environmentally neutral species. - View Dependent Claims (8, 9, 10)
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11. A method for controlling a Fenton-type reaction at a contaminated site comprising the steps of:
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introducing a Fenton reagent into a below-ground contaminated site; enhancing a diffusion of the Fenton reagent throughout the site; introducing an oxidizing agent into the site; enhancing a diffusion of the oxidizing agent throughout the site; permitting a Fenton reaction to occur, releasing a free radical; permitting the free radical to act upon a contaminant to form environmentally neutral species. - View Dependent Claims (12)
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13. A method for delivering a Fenton-type reaction to a contaminated below-ground site comprising the steps of:
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creating a portal into a contaminated site beneath a water table thereof, the contaminated site essentially free from prior chemical treatment; introducing a Fenton reagent into the portal; permitting the Fenton reagent to diffuse through the site; introducing an oxidizing agent into the portal; permitting a Fenton reaction to occur, releasing a free radical for acting upon contaminant bonds to create environmentally neutral species therefrom. - View Dependent Claims (14, 15)
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16. A system for remediating a contaminated site comprising:
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means for sequentially introducing a first and a second composition into a site containing ground water and soil having a hydrocarbon contaminant therein, the site essentially chemically untreated, the first and the second compositions comprising Fenton-type reactants; and means for introducing turbulence in the ground water, for facilitating a dispersion of the first and the second composition throughout the site and for enhancing a mixing thereof. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A remediation site for reducing a below-ground contaminant level, the site comprising:
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ground water and soil having been essentially chemically unpretreated; a contaminant plume having a hydrocarbon contaminant therein present in the ground water and the soil; means for sequentially introducing a first and a second composition into the contaminant plume, the first and the second compositions comprising Fenton-type reactants; and means for introducing turbulence in the ground water, for facilitating a dispersion of the first and the second composition throughout the contaminant plume and for enhancing a mixing thereof. - View Dependent Claims (35)
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Specification