초록 ▼

A process for in situ treatment of a contaminated subsurface zone of the earth containing volatile liquid or semisolid organic contaminants, semivolatile liquid or semisolid organic contaminants and/or nonvolatile organic contaminants in liquid, semisolid and/or solidified form which comprises treat

A process for in situ treatment of a contaminated subsurface zone of the earth containing volatile liquid or semisolid organic contaminants, semivolatile liquid or semisolid organic contaminants and/or nonvolatile organic contaminants in liquid, semisolid and/or solidified form which comprises treating said contaminants with an oxidant such as hydrogen peroxide and conducting vacuum extraction to remove volatilized contaminants, volatilized oxidation products of contaminants and/or liquid oxidation products of contaminants. The oxidant application may be made in a contaminated subsurface vadose zone, a contaminated subsurface capillary fringe or beneath the surface of a contaminated water table. Vacuum extraction may be conducted in the contaminated zone itself or, in the vadose zone directly above the contaminated capillary fringe or the contaminated water table and may be utilized, e.g., to withdraw water containing oxidation products of contaminants. The treatment may enhance natural biodegradation of some contaminants and may be conducted in a variety of ways.

대표청구항 ▼

An in situ process for removing one or more volatile, semivolatile or nonvolatile organic contaminants present in liquid, semisolid or solid form in a contaminated subsurface zone, which process comprises the steps of: (a) introducing into said contaminated subsurface zone an oxidant having the capa

An in situ process for removing one or more volatile, semivolatile or nonvolatile organic contaminants present in liquid, semisolid or solid form in a contaminated subsurface zone, which process comprises the steps of: (a) introducing into said contaminated subsurface zone an oxidant having the capability to react exothermically with said contaminants to form oxidation products thereof; (b) allowing said oxidant to react exothermically with said contaminants to form oxidation products; (c) installing at least one vacuum extraction well into the contaminated subsurface zone or into another subsurface zone at a position proximate to the position in the contaminated zone at which oxidant was introduced; (d) applying to the top of said vacuum extraction well a vacuum that is sufficient to create a negative pressure gradient in the subsurface; and (e) removing through said vacuum extraction well to the surface oxidation products of said contaminants.