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

  • US 7,708,496 B2
  • Filed: 10/31/2007
  • Issued: 05/04/2010
  • Est. Priority Date: 11/06/2001
  • Status: Active Grant
First Claim
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1. A method for substantially removing subsurface contaminants, comprising the steps of:

  • introducing first an effective amount of at least one pre-selected biodegradable co-solvent;

    introducing second an effective amount of at least one pre-selected surfactant solution, comprising the steps of;

    determining a contaminant solubilization of a surfactant system;

    determining a surfactant sorption and precipitation of the surfactant system;

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

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

    introducing third an effective amount of at least one pre-selected chemical oxidant, comprising 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 combination of the effective amount of at least one pre-selected biodegradable co-solvent, the at least one pre-selected surfactant solution, and the effective amount of at least one pre-selected chemical oxidant is capable of substantially removing subsurface contaminants.

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