Groundwater and subsurface remediation

A method for treating subsurface water comprises:

• promoting a recirculation of water into a well and through surrounding ground area;
• injecting through at least one microporous diffuser disposed in an injection well a first fluid of a hydroperoxide selected from the group consisting of formic peracid, hydroxymethyl hydroperoxide, 1-hydroxylethyl hydroperoxide, and chloroformic peracid or their derivatives as a coating over microbubbles of ozone and air.

A method of treating a site comprises:

• sparging the site with microbubbles containing air/ozone gas, with the microbubbles having a hydroperoxide coating, the hydroperoxide being a hydroperoxide that is a substantial byproduct of a reaction of a contaminant present in the site with the ozone in the microbubbles, and with the microbubbles further having promoters or nutrients selected from the group consisting of iron containing compounds or palladium containing compounds.

A method for treating subsurface water comprises:

• injecting through at least one microporous diffuser disposed in an injection well a first fluid of a hydroperoxide selected from the group consisting of formic peracid, hydroxymethyl hydroperoxide, 1-hydroxylethyl hydroperoxide, and chloroformic peracid or their derivatives as a coating over microbubbles of ozone and air by delivering air ozone to a central inner chamber of the microporous diffuser and delivering the selected hydroperoxides to an outer chamber of the microporous diffuser.