In-situ surfactant and chemical oxidant flushing for complete remediation of contaminants and methods of using same

• US 6,913,419 B2
• Filed: 11/06/2002
• Issued: 07/05/2005
• Est. Priority Date: 11/06/2001
• Status: Active Grant

• Current Assignee: Tersus Environmental, Inc.
• Original Assignee: Surbec-art Environmental, LLC
• Inventors: Shiau, Bor-Jier
• Primary Examiner(s): KRECK, JOHN J
• Application Number:
  US10/290,424
• Publication Number:
  US 20030175081A1
• Time in Patent Office: 972 Days
• Field of Search: 405/128.15, 405/128.25, 405/128.45, 405/128.75, 405/128.5
• US Class Current: 405/128.25
• CPC Class Codes: B09C 1/002 involving in-situ ground water treatment
• 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

The present invention relates to removal of subsurface contaminants and methods of same. In more particular, but not by way of limitation, the present invention relates to an integrated method for remediating subsurface contaminants through the use of a low concentration surfactant solution (and methods of making and using novel surfactant solutions) followed by an abiotic polishing process to thereafter achieve a substantially reduced subsurface contaminant concentration that surfactant flushing alone cannot achieve.

Claims

1. A method for substantially removing subsurface contaminants, comprising the steps of:

introducing an effective amount of at least one preselected surfactant solution wherein the preselected surfactant solution is a mixture of sodium dioctylsulfosuccinate and linear alkyl diphenyloxide disulfonate; and

introducing an effective amount of at least one preselected chemical oxidant, wherein the effective amount of the at least one preselected surfactant in combination with the effective amount of the at least one preselected chemical oxidant are capable of substantially removing subsurface contaminants.

2. The method of claim 1, wherein the effective amount of the preselected subsurface contaminant is introduced first and the effective amount of the at least one preselected chemical oxidant is introduced second.

3. The method of claim 1, wherein the subsurface contaminant is a dense non-aqueous phase liquid.

4. The method of claim 1, wherein the subsurface contaminant is a light non-aqueous phase liquid.

5. The method of claim 1, wherein the effective amount of the at least one preselected chemical oxidant is a free radical.

6. The method of claim 5, wherein the effective amount of the at least one preselected chemical oxidant is selected from the group consisting of hydrogen peroxide, potassium permanganate, and combinations thereof.

7. The method of claim 1, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 0.05% to about 15%.

8. The method of claim 1, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 3% to about 8%.

9. The method of claim 1, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 1% to about 3%.

10. The method of claim 1, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 0.05% to about 1%.

11. A method for substantially removing subsurface contaminants, comprising the steps of:

introducing an effective amount of at least one preselected surfactant solution, including the steps of;

determining the contaminant solubilization of the surfactant system,

determining the surfactant sorption and precipitation of the surfactant system

determining the surfactant non-aqueous phase liquid behavior properties of the surfactant system to assess the potential for surfactant losses under subsurface conditions, and

performing contaminant extraction-column studies to simulate flow through conditions in the aquifer;

introducing an effective amount of at least one preselected chemical oxidant, including the steps of;

determining relative reaction rates of the reactant,

determining the life span of the reactant,

evaluating the chemical demand associated with pH adjustment, and

identifying geochemical characteristics of the site;

wherein the effective amount of the at least one preselected surfactant in combination with the effective amount of the at least one preselected chemical oxidant are capable of substantially removing subsurface contaminants.

12. The method of claim 11, wherein the effective amount of the preselected subsurface contaminant is introduced first and the effective amount of the at least one preselected chemical oxidant is introduced second.

13. A method for substantially removing subsurface contaminants, comprising the steps of:

introducing an effective amount of at least one preselected surfactant solution, wherein the preselected surfactant solution is a mixture of alkylamine sodium sulfonate and sodium dihexylsulfosuccinate; and

introducing an effective amount of at least one preselected chemical oxidant, wherein the effective amount of the at least one preselected surfactant in combination with the effective amount of the at least one preselected chemical oxidant are capable of substantially removing subsurface contaminants.

14. The method of claim 13, wherein the effective amount of the preselected subsurface contaminant is introduced first and the effective amount of the at least one preselected chemical oxidant is introduced second.

15. The method of claim 13, wherein the subsurface contaminant is a dense non-aqueous phase liquid.

16. The method of claim 13, wherein the subsurface contaminant is a light non-aqueous phase liquid.

17. The method of claim 13, wherein the effective amount of the at least one preselected chemical oxidant is a free radical.

18. The method of claim 17, wherein the effective amount of the at least one preselected chemical oxidant is selected from the group consisting of hydrogen peroxide, potassium permanganate, and combinations thereof.

19. The method of claim 13, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 0.05% to about 15%.

20. The method of claim 13, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 3% to about 8%.

21. The method of claim 13, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 1% to about 3%.

22. The method of claim 13, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 0.05% to about 1%.

23. A subsurface contaminant site substantially remediated by the process comprising the steps of:

introducing an effective amount of at least one preselected surfactant solution wherein the preselected surfactant solution is a mixture of sodium dioctylsulfosuccinate and linear alkyl diphenyloxide disulfonate; and

introducing an effective amount of at least one preselected chemical oxidant, wherein the effective amount of the at least one preselected surfactant in combination with the effective amount of the at least one preselected chemical oxidant are capable of substantially removing subsurface contaminants.

24. The substantially remediated site of claim 23, wherein the effective amount of the preselected subsurface contaminant is introduced first and the effective amount of the at least one preselected chemical oxidant is introduced second.

25. The substantially remediated site of claim 23, wherein the effective amount of the at least one preselected chemical oxidant is a free radical.

26. The substantially remediated site of claim 25, wherein the effective amount of the at least one preselected chemical oxidant is selected from the group consisting of hydrogen peroxide, potassium permanganate, and combinations thereof.

27. The substantially remediated site of claim 23, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 0.05% to about 15%.

28. The substantially remediated site of claim 23, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 3% to about 8%.

29. The substantially remediated site of claim 23, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 1% to about 3%.

30. The substantially remediated site of claim 23, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 0.05% to about 1%.

31. A subsurface contaminant site substantially remediated by the process comprising the steps of:

introducing an effective amount of at least one preselected surfactant solution wherein the preselected surfactant solution is a mixture of alkylamine sodium sulfonate and sodium dihexylsulfosuccinate; and

introducing an effective amount of at least one preselected chemical oxidant, wherein the effective amount of the at least one preselected surfactant in combination with the effective amount of the at least one preselected chemical oxidant are capable of substantially removing subsurface contaminants.

32. The substantially remediated site of claim 31, wherein the effective amount of the preselected subsurface contaminant is introduced first and the effective amount of the at least one preselected chemical oxidant is introduced second.

33. The substantially remediated site of claim 31, wherein the effective amount of the at least one preselected chemical oxidant is a free radical.

34. The substantially remediated site of claim 33, wherein the effective amount of the at least one preselected chemical oxidant is selected from the group consisting of hydrogen peroxide, potassium permanganate, and combinations thereof.

35. The substantially remediated site of claim 31, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 0.05 to about 15%.

36. The substantially remediated site of claim 31, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 3% to about 8%.

37. The substantially remediated site of claim 31, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 1% to about 3%.

38. The substantially remediated site of claim 31, wherein the weight percent of effective amount of the at least one preselected surfactant solution is in a range from about 0.05% to about 1%.