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US 8,206,062 B2Granted
Soil remediation method and composition
AssigneeVeruTEK Technologies, Inc.
InventorsGeorge E. Hoag, John Collins
Life of this patent
Estimating the term…
Abstract
A method for in-situ reduction of contaminants in soil.
Claims22
A method for determining a subsurface contaminant remediation protocol, comprising:
- collecting a soil sample from the subsurface;
- identifying at least one target contaminant for concentration reduction;
- choosing a surfactant and optionally choosing a cosolvent for injection into the subsurface to solubilize and/or desorb the at least one target contaminant;
- choosing an oxidant and optionally choosing an activator for the oxidant for injection into the subsurface to oxidize the target contaminant;
- and
- choosing the quantity of surfactant for injection into the subsurface to form a Winsor I system or a submicellar surfactant solution or a microemulsion;
- injecting the surfactant and the oxidant into the soil sample;
- and
- measuring an initial surfactant concentration in the soil sample and a final surfactant concentration in the soil sample after a period of time,
- wherein the surfactant resists oxidation by the oxidant, and the surfactant increases oxidation of the at least one target contaminant in the soil sample,
- wherein the contaminant comprises a nonaqueous phase liquid (NAPL), and
- wherein at least 40% of the initial mass of the contaminant is destroyed in situ in the sample.
9 more elements
A method for determining a subsurface contaminant remediation protocol, comprising:
- collecting a soil sample from the subsurface;
- identifying at least one target contaminant for concentration reduction;
- choosing a surfactant or surfactants and optionally choosing a solvent for injection into the subsurface to desorb and solubilize the at least one target contaminant;
- choosing an oxidant and optionally choosing an activator for injection into the subsurface to oxidize the target contaminant;
- choosing the quantity of surfactant for injection into the subsurface to form a Winsor I system or a microemulsion;
- determining the spatial concentration distribution of the target contaminant;
- determining a hydrogeological property of the subsurface;
- and
- using the determined spatial concentration distribution of the target contaminant and the hydrogeological property to determine the target depth for the surfactant and oxidant and optionally for the solvent and activator,
- injecting the surfactant and the oxidant into the soil sample;
- and
- measuring an initial surfactant concentration in the soil sample and a final surfactant concentration in the soil sample after a period of time,
- wherein the surfactant resists oxidation by the oxidant, and the surfactant increases oxidation of the at least one target contaminant in the soil sample,
- wherein the contaminant comprises a nonaqueous phase liquid (NAPL), and
- wherein at least 40% of the initial mass of the contaminant is destroyed in situ in the sample.
12 more elements
Dependencies are inferred from the claim text.