System and method for remediating contaminated soil and groundwater in situ
DCFirst Claim
1. A method for the in-situ removal or remediation of contaminants in a soil formation containing a subsurface groundwater aquifer, the method comprising the steps of:
- injecting a first oxidant into the aquifer at a first injection point to create a first volume of influence in the aquifer;
injecting a compressed gas into the aquifer at the first injection point to increase the size of the first volume of influence;
injecting a second oxidant into the aquifer at a second injection point to create a second volume of influence in the aquifer, wherein the first oxidant and the second oxidant are different from each other; and
injecting a compressed gas into the aquifer at the second injection point to increase the size of the second volume of influence.
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Abstract
A system and method for the in-situ removal or remediation of contaminants in a soil formation containing a subsurface groundwater aquifer, the method comprising the steps of: injecting a first oxidant into the aquifer at an injection point to create a volume of influence of the first oxidant in the aquifer thereby treating the contaminants contained within the volume of influence; and injecting a compressed gas into the aquifer to increase the size of the volume of influence of the first oxidant. The injection of the compressed gas into the aquifer can also force the groundwater in the aquifer away from the injection point into a surrounding area to transport the first oxidant into the surrounding area thereby extracting contaminants from soil adjacent to the surrounding area.
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Citations
25 Claims
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1. A method for the in-situ removal or remediation of contaminants in a soil formation containing a subsurface groundwater aquifer, the method comprising the steps of:
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injecting a first oxidant into the aquifer at a first injection point to create a first volume of influence in the aquifer; injecting a compressed gas into the aquifer at the first injection point to increase the size of the first volume of influence; injecting a second oxidant into the aquifer at a second injection point to create a second volume of influence in the aquifer, wherein the first oxidant and the second oxidant are different from each other; and injecting a compressed gas into the aquifer at the second injection point to increase the size of the second volume of influence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for the in-situ removal or remediation of contaminants in a soil formation containing a subsurface groundwater aquifer, wherein the contaminants are spread out by diffusion, movement of the groundwater, and other mechanisms to form a contaminant plume, the method comprising the steps of:
sequentially injecting, in any order, a hydrogen peroxide solution, an ozone/oxygen mixture, and compressed gas into the aquifer, the hydrogen peroxide solution and the ozone/oxygen mixture being injected from first and second injection points, respectively, to treat the contaminants contained within the groundwater, wherein the injection of the compressed gas forces the groundwater away from the first and second injection points into a saturated zone or smear zone of the contaminant plume, thereby transporting the hydrogen peroxide solution and the ozone/oxygen mixture into the saturated zone or smear zone of the contaminant plume. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method for the in-situ removal or remediation of contaminants in a soil formation containing a subsurface groundwater aquifer, the method comprising the steps of:
intermittently introducing, individually and in any order, a first oxidant, a second oxidant, and compressed gas into the groundwater to treat the contaminants contained within the aquifer, wherein the introduction of each oxidant creates a volume of influence of each oxidant, wherein the introduction of the compressed gas increases the size of each volume of influence of each oxidant, and wherein the first oxidant and the second oxidant are injected at separate injection points, wherein the first oxidant is different from the second oxidant. - View Dependent Claims (21)
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22. A method for the in-situ removal or remediation of contaminants in a soil formation containing a subsurface groundwater aquifer, the method comprising the steps of:
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injecting a first oxidant into the aquifer at a first injection point to create a first volume of influence in the aquifer; injecting a compressed gas into the aquifer at the first injection point to increase the size of the first volume of influence; injecting a second oxidant into the aquifer at a second injection point to create a second volume of influence in the aquifer; and injecting a compressed gas into the aquifer at the second injection point to increase the size of the second volume of influence, wherein the second oxidant is selected from the group consisting of a hydrogen peroxide solution, an ozone/air mixture, an ozone/oxygen mixture, and combinations of an ozone/air mixture and an ozone/oxygen mixture, with the proviso that if the first oxidant is a hydrogen peroxide solution, the second oxidant must be an ozone/air mixture, an ozone/oxygen mixture, or a combination of an ozone/air mixture and an ozone/oxygen mixture; and if the first oxidant is an ozone/air mixture, an ozone/oxygen mixture, or a combination of an ozone/air mixture and an ozone/oxygen mixture, the second oxidant must be a hydrogen peroxide solution. - View Dependent Claims (23, 24, 25)
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Specification