Patent ID: 6521810
Filing Date: 2003-02-18
Classification: B09C

Abstract:
A method for in situ decontamination by reductive dehalogenation of contaminated media including ground water, soil, and mixtures of soil and ground water contaminated by halogenated hydrocarbons, the method comprising:introducing remediating ions consisting essentially of ferrous ions, and being peroxide-free, into the contaminated media; applying a potential difference across the contaminated media to cause the remediating iron ions to migrate into contact with halogenated hydrocarbon contaminants in the contaminated media; chemically degrading the contaminants by reductive dehalogenation in the contaminated media by contact with the remediating iron ions; monitoring the contaminated media for halide degradation products of the halogenated hydrocarbon contaminants; and controlling the potential difference across the contaminated media in response to the step of monitoring halide degradation products.