Methods of using hydrogen peroxide for in-situ chemical oxidation treatment of soil and groundwater

• US 20150021275A1
• Filed: 07/16/2013
• Published: 01/22/2015
• Est. Priority Date: 07/16/2013
• Status: Active Grant

• Current Assignee: Gary Cronk
• Original Assignee: Gary Cronk
• Inventors: Cronk, Gary
• Granted Patent: US 9,259,771 B2
• Time in Patent Office: Days
• US Class Current: 210/741
• CPC Class Codes: B09C 1/00 Reclamation of contaminated soil
• CPC Class Codes: B09C 1/002 involving in-situ ground water treatment
• CPC Class Codes: B09C 1/08 chemically
• CPC Class Codes: C02F 1/722 Oxidation by peroxides
• CPC Class Codes: C02F 1/725 by catalytic oxidation
• CPC Class Codes: C02F 2103/06 Contaminated groundwater or leachate
• CPC Class Codes: C02F 2209/02 Temperature
• CPC Class Codes: C02F 2209/03 Pressure

Abstract

Disclosed are methods of custom stabilization of the hydrogen peroxide used in the safe in-situ treatment of soil and groundwater. In one embodiment, disclosed is a method of in-situ chemical oxidation treatment of soil and/or groundwater wherein the hydrogen peroxide has been stabilized with carboxylate salt (e.g., sodium citrate, sodium malonate, or sodium phytate). Procedurally, chemical daylighting is avoided by: (a) mixing a batch of aqueous hydrogen peroxide solution with a carboxylate salt; (b) injecting the solution into a subterranean location; (c) allowing iron to that is naturally present in the in-situ environment to mix with the solution; (d) controlling the subsurface pressure and temperature within the in-situ environment; (e) manipulating the concentration of carboxylate salt in the remainder of the hydrogen peroxide batch (as necessary), wherein the concentration of carboxylate salt defines the life-span of the hydrogen peroxide, and helps to control the subsurface reaction and minimize the possibility of chemical daylighting

Claims

1. A method of in situ chemical oxidation comprising the steps of:

mixing an aqueous hydrogen peroxide solution with a carboxylate salt;

(b) injecting a portion of the solution into a subsurface area of soil and water;

(c) allowing iron that is naturally present in the in-situ environment to catalyze the hydrogen peroxide in the solution; and

,

(d) controlling a condition in the in-situ environment via measuring the condition and manipulating the concentration of carboxylate salt in the remainder of the solution.

2. The method of claim 1 wherein the condition is temperature.

3. The method of claim 1 wherein the condition is pressure.

4. The method of claim 1 wherein the condition is chemical daylighting.

5. The method of claim 1 wherein the condition is selected from the group consisting essentially of temperature, pressure, and chemical daylighting.

6. The method of claim 2 wherein:

IF the temperature is more than one-hundred and twenty degrees Fahrenheit, THEN the concentration of carboxylate salt in the remainder of the solution is increased.

7. The method of claim 3 wherein:

IF the pressure is more than thirty psi, THEN the concentration of carboxylate salt in the remainder of the solution is increased.

8. The method of claim 4 wherein:

IF chemical daylighting exists, THEN the concentration of carboxylate salt in the remainder of the solution is increased.

9. The method of claim 1 wherein said solution is injected via direct push injection.

10. The method of claim 1 wherein said solution is injected via injection wells.

11. The method of claim 9 wherein the condition is selected from the group consisting essentially of temperature, pressure, and chemical daylighting.

12. The method of claim 10 wherein the condition is temperature.

13. The method of claim 10 wherein the condition is pressure.

14. The method of claim 10 wherein the condition is chemical daylighting.

15. The method of claim 10 wherein the condition is selected from the group consisting essentially of temperature, pressure, and chemical daylighting.

16. The method of claim 12 wherein:

IF the temperature is more than one hundred and twenty degrees Fahrenheit, THEN the concentration of carboxylate salt in the remainder of the solution is increased.

17. The method of claim 13 wherein:

IF the pressure is more than thirty psi, THEN the concentration of carboxylate salt in the remainder of the solution is increased.

18. The method of claim 14 wherein:

IF chemical daylighting exists, THEN the concentration of carboxylate salt in the remainder of the solution is increased.

21. The method of claim 9 wherein the condition is temperature.

22. The method of claim 9 wherein the condition is pressure.

23. The method of claim 9 wherein the condition is chemical daylighting.

24. The method of claim 12 wherein:

IF the temperature is more than one hundred and twenty degrees Fahrenheit, THEN the concentration of carboxylate salt in the remainder of the solution is increased.

25. The method of claim 13 wherein:

IF the pressure is more than thirty psi, THEN the concentration of carboxylate salt in the remainder of the solution is increased.

26. The method of claim 14 wherein:

IF chemical daylighting exists, THEN the concentration of carboxylate salt in the remainder of the solution is increased.

19. A method of in situ chemical oxidation comprising the steps of

(a) mixing sodium persulfate;

(b) injecting the sodium persulfate;

(c) mixing an aqueous hydrogen peroxide solution with a carboxylate salt;

(d) injecting a portion of the solution into a subsurface area of soil and water;

(e) allowing iron that is naturally present in the in-situ environment to catalyze the hydrogen peroxide in the solution; and

,

(f) controlling a condition in the in-situ environment via measuring the condition and manipulating the concentration of carboxylate salt in the remainder of the solution.

20. The method of claim 19 wherein the condition is selected from the group consisting essentially of temperature, pressure, and chemical daylighting.