In-situ surfactant and chemical oxidant flushing for complete remediation of contaminants and methods of using same
AssigneeSurbec-Art Environmental, L.L.C.
InventorBor-Jier Shiau
Life of this patent
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Abstract
The present invention relates to the removal of subsurface contaminants and methods of using 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. The present invention is focused on remediation of high viscosity hydrocarbons, such as heating oils or coal tars, with a combination of pre-injection of bio-co-solvent and surfactant (and polymer) flush approach.
Claims30
A method for substantially removing subsurface contaminants, comprising the steps of:
- introducing via in-situ injection an effective amount of at least one pre-selected surfactant solution to a targeted treatment zone, wherein the effective amount of at least one pre-selected surfactant solution is a mixture of sodium diocytisulfosuccinate and linear alkyl diphenyloxide disulfonate;
- and
- introducing via in-situ injection an effective amount of at least one pre-selected biodegradable co-solvent to the targeted treatment zone, wherein the effective amount of the at least one pre-selected biodegradable co-solvent in combination with the effective amount of the at least one pre-selected surfactant solution remove subsurface contaminants to substantially undetectable or extremely low levels.
A method for substantially removing subsurface contaminants, comprising the steps of:
- introducing via in-situ injection an effective amount of at least one pre-selected surfactant solution to a targeted treatment zone, wherein the effective amount of at least one pre-selected surfactant solution is a mixture of alkylamine sodium sulfonate and sodium dihexylsulfosuccinate;
- and
- introducing via in-situ injection an effective amount of at least one pre-selected biodegradable co-solvent to the targeted treatment zone, wherein the effective amount of the at least one pre-selected biodegradable co-solvent in combination with the effective amount of the at least one pre-selected surfactant solution remove subsurface contaminants to substantially undetectable or extremely low levels.
A method for substantially expediting subsurface remediation of contaminants, comprising the steps of:
- introducing via in-situ injection an effective amount of at least one bio-degradable co-solvent first to a targeted treatment zone;
- introducing via in-situ injection and effective amount of at least one surfactant solution to a targeted treatment zone, wherein that effective amount of at least one surfactant solution is a mixture of sodium diocytlsulfosuccinate and linear alkyl diphenyloxide disulfonate, and further wherein the effective amount of at least one surfactant solution remediates at least one subsurface contaminant;
- and
- introducing via in-situ injection an effective amount of at least one pre-selected chemical oxidant to a targeted treatment zone.
A method for substantially expediting subsurface remediation of contaminants, comprising the steps of:
- introducing via in-situ injection an effective amount of at least one bio-degradable co-solvent first to a targeted treatment zone;
- introducing via in-situ injection and effective amount of at least one surfactant solution to a targeted treatment zone, wherein that effective amount of at least one surfactant solution is a mixture of alkylamine sodium sulfonate and sodium dihexylsulfosuccinate, and further wherein the effective amount of at least one surfactant solution remediates at least one subsurface contaminant;
- and
- introducing via in-situ injection an effective amount of at least one pre-selected chemical oxidant to a targeted treatment zone.
Dependencies are inferred from the claim text.