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

• US 7,364,386 B2
• Filed: 12/13/2006
• Issued: 04/29/2008
• Est. Priority Date: 11/06/2001
• Status: Expired due to Term

• Current Assignee: Tersus Environmental, Inc.
• Original Assignee: Surbec Environmental LLC
• Inventors: Shiau, Bor-Jier
• Primary Examiner(s): KRECK, JOHN J
• Application Number:
  US11/638,628
• Publication Number:
  US 20070110520A1
• Time in Patent Office: 503 Days
• Field of Search: 405/128.1, 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).

Claims

1. A method for substantially removing subsurface contaminants, comprising the step of introducing an effective amount of a mixture of sodium dioctylsulfosuccinate, linear alkyl diphenyloxide disulfonate, and water, wherein the weight percent of the sodium dioctylsulfosuccinate and linear alkyl diphenyloxide disulfonate in the mixture is in a range from about 0.05% to about 15% by weight of the mixture.

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

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

4. A method for substantially removing subsurface contaminants, comprising the step of introducing an effective amount of a mixture of sodium dioctylsulfosuccinate, linear alkyl diphenyloxide disulfonate, and water, wherein the weight percent of the sodium dioctylsulfosuccinate and linear alkyl diphenyloxide disulfonate in the mixture is in a range from about 3% to about 8% by weight of the mixture.

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

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

7. A method for substantially removing subsurface contaminants, comprising the step of introducing an effective amount of a mixture of sodium dioctylsulfosuccinate, linear alkyl diphenyloxide disulfonate, and water, wherein the weight percent of the sodium dioctylsulfosuccinate and linear alkyl diphenyloxide disulfonate in the mixture is in a range from about 1% to about 3% by weight of the mixture.

8. The method of claim 7, wherein the subsurface contaminant is a dense non-aqueous phase liquid.

9. The method of claim 7, wherein the subsurface contaminant is a light non-aqueous phase liquid.

10. A method for substantially removing subsurface contaminants, comprising the step of introducing an effective amount of a mixture of sodium dioctylsulfosuccinate, linear alkyl diphenyloxide disulfonate, and water, wherein the weight percent of the sodium dioctylsulfosuccinate and linear alkyl diphenyloxide disulfonate in the mixture is in a range from about 0.05% to about 1% by weight of the mixture.

11. The method of claim 10, wherein the subsurface contaminant is a dense non-aqueous phase liquid.

12. The method of claim 10, wherein the subsurface contaminant is a light non-aqueous phase liquid.