Method of removing contaminants from a contaminated earth mass

• US 20030133755A1
• Filed: 01/15/2002
• Published: 07/17/2003
• Est. Priority Date: 01/15/2002
• Status: Abandoned Application

• Current Assignee: Choong Hee Rhee
• Original Assignee: Choong Hee Rhee
• Inventors: Rhee, Choong Hee
• Application Number:
  US10/046,050
• Publication Number:
  US 20030133755A1
• Time in Patent Office: Days
• US Class Current: 405/128.25
• CPC Class Codes: B09C 1/02 Extraction using liquids, e.g. washing, leaching , flotation
• CPC Class Codes: B09C 1/08 chemically
• CPC Class Codes: B09C 2101/00 In situ

Abstract

Toxic contaminants dispersed throughout a section of earth can be removed by a process that includes applying liquid hydrogen peroxide to the earth surface, and exerting a vacuum force on the earth at a depth where the earth is relatively uncontaminated. The vacuum force evacuates the earth pores, to augment the gravitational force on the liquid hydrogen peroxide, so that the liquid is enabled to flow through the earth to chemically react with toxic contaminants. One or more vacuum pumps are connected with underground perforated pipes bordering the treated earth section, to produce the necessary vacuum force on the liquid hydrogen peroxide.

Claims

1. A method of removing toxic contaminants from a predetermined earth mass, comprising:

(a) positioning a perforated pipe underground along the border of a contaminated earth mass;

(b) flooding the surface of the contaminated earth mass with liquid hydrogen peroxide so that the liquid gravitates into the contaminated earth for chemical reaction with toxic contaminants; and

(c) applying a vacuum to the underground perforated pipe.

2. The method of claim 1, wherein the step of applying a vacuum to the perforated pipe includes applying a first vacuum force to the perforated pipe prior to the liquid flooding step, and applying a second vacuum force to the perforated pipe after the liquid flooding step, the use of vacuum being only applicable when needed.

3. The method of claim 1, wherein the step of positioning the perforated pipe involves digging a trench in the earth surface, and laying a perforated pipe in the trench.

4. The method of claim 1, wherein the step of positioning the perforated pipe involves digging an annular trench in the earth surface around the contaminated earth mars, and laying a perforated pipe in the trench so that the pipe forms an endless channel circumscribing the contaminated earth mass.

5. The method of claim 1, wherein the step of applying a vacuum to the perforated pipe is carried out with at least one vacuum pump located above the earth surface, if needed.

6. A method of removing toxic contaminants from a predetermined earth section comprising:

(a) circumscribing a contaminated earth section with an endless barrier extending downwardly from the earth surface, so that an inner surface of the barrier faces the contaminated earth section;

(b) positioning at least one perforated pipe along the inner surface of the barrier so that the pipe perforations are in fluid communication with the contaminated earth section;

(c) flooding the surface of the contaminated earth section with liquid hydrogen peroxide so that the liquid gravitates into the contaminated earth for chemical reaction with toxic contaminates; and

(d) applying a vacuum to the perforated pipe.

7. The method of claim 6, wherein the pipe positioning step includes forming a trench in the earth, and laying the perforated pipe in the trench.

8. The method of claim 6, wherein the step of circumscribing a contaminated earth section with an endless barrier, includes forming a trench in the earth to provide a trench bottom surface, a trench inner surface, and a trench outer surface;

and coating the trench outer surface with a barrier material.

9. The method of claim 8, wherein the pipe positioning step includes laying the perforated pipe on the bottom surface of the trench.

10. The method of claim 9, wherein the step of applying a vacuum to the perforated pipe includes extending at least one riser pipe upwardly from said perforated pipe, and connecting a vacuum pump to the riser pipe.

11. The method of claim 6, wherein the step of applying a vacuum to the perforated pipe includes locating at least one vacuum pump on the earth surface, and extending a conduit from the perforated pipe to the pump.