Remediation apparatus and method for organic contamination in soil and groundwater
First Claim
1. A method for the in-situ treatment and remediation of a contaminated underground area that contains chemical contaminants comprising the steps of:
- determining an effective amount of a reactive solution required to treat the contaminated area;
injecting at an effective pressure and at a flow rate in excess of a sustainable yield the amount of the reactive solution into one or more injectors that are inserted into the ground, sealed and positioned so as to assure liquid flow and dispersion of the reactive solution through the contaminated area;
allowing said reactive solution to flow through the contaminated area thereby reacting chemically with the contaminants contained within the contaminated area; and
determining completion of the chemical reaction by monitoring by-products of the chemical reaction.
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Abstract
The present invention provides a method and apparatus for in-situ treatment of soil and groundwater contaminated with organic pollutants. The process involves defining the nature and extent of the contamination; determining the hydrology and geology of the contaminated area; determining the volume and concentration of a reactive solution required to effect treatment of the contaminated area; injecting the reactive solution into one or more injectors that are inserted into the ground, sealed and positioned so as to assure flow of the reactive solution through the contaminated area; allowing the reactive solution to flow through the contaminated area thereby reacting chemically with the contaminants contained within the contaminated area; and determining when the treatment is complete by monitoring by-products of the chemical reaction. Preferably, the reactive solution is an aqueous solution of hydrogen peroxide and metallic salts.
104 Citations
20 Claims
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1. A method for the in-situ treatment and remediation of a contaminated underground area that contains chemical contaminants comprising the steps of:
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determining an effective amount of a reactive solution required to treat the contaminated area; injecting at an effective pressure and at a flow rate in excess of a sustainable yield the amount of the reactive solution into one or more injectors that are inserted into the ground, sealed and positioned so as to assure liquid flow and dispersion of the reactive solution through the contaminated area; allowing said reactive solution to flow through the contaminated area thereby reacting chemically with the contaminants contained within the contaminated area; and determining completion of the chemical reaction by monitoring by-products of the chemical reaction. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for the in-situ treatment and remediation of a contaminated area of subsurface soil that contains chemical contaminants comprising the steps of:
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mixing a pH adjusted, aqueous solution stream containing metallic salts, stabilizers and surfactants with a stream containing an aqueous solution of hydrogen peroxide thereby producing a reactive solution; injecting at an effective pressure and at a flow rate in excess of a sustainable yield said reactive solution into one or more injectors which are inserted into the surface of the soil, sealed and positioned so as to assure flow of the reactive solution through the contaminated soil; monitoring a pressure in the injector to insure that a formation pressure of the soil is not exceeded; allowing said reactive solution to flow and disperse through the subsurface soil thereby reacting chemically with the contaminants contained within the soil; and determining a completion of the chemical reaction by monitoring by-products of the chemical reaction and chemically analyzing one or more samples taken from the treatment area. - View Dependent Claims (8, 9, 10, 11)
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12. A method for the in-situ treatment and remediation of a contaminated volume of groundwater that contains chemical contaminants comprising the steps of:
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mixing a pH adjusted, aqueous solution stream containing metallic salts, stabilizers and surfactants with a stream containing an aqueous solution of hydrogen peroxide thereby producing a reactive solution; injecting at an effective pressure and at a flow rate in excess of a sustainable yield said reactive solution into one or more injectors which are inserted into injector holes bored into the ground, sealed and positioned so as to assure dispersion of the reactive solution throughout the contaminated groundwater; injecting a gas into the injector to aid in the circulation and distribution of said reactive solution throughout the contaminated groundwater; circulating groundwater through the injector and aquifer via a closed loop groundwater recycling means; monitoring a pressure in the injector to insure that a pressure limitation of the soil is not exceeded; allowing said reactive solution to disperse through the groundwater thereby reacting chemically with the contaminants contained within the groundwater; and determining a completion of the chemical reaction by monitoring by-products of the chemical reaction. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification