Patent ID: 7326002

Claim:
A method for removal of contaminants from a formation, the method comprises: introducing into a formation at a first location, treatment materials at concentrations to effect removal of contaminant, the first location being substantially coextensive with an underlying region of fractured rock or bedding plates within which a contaminant is determined to reside the treatment materials included in coatings of fine bubbles trapping a gas, the fine bubbles having a diameter in a range of about 0.1 microns to 200 microns in diameter with a specific gravity characteristic of the fine bubbles upon injection being in a range of 1.0 to 2.0; and withdrawing fluid front a second location that is spaced from the first location, by the underlying region of fractured rock or bedding plates, with the fluid being drawn through the underlying region of fractured rock or bedding plates: and feeding withdrawn fluid back into the first location.