PHOTOCHEMICAL PROCESS FOR THE LIQUID PHASE DESTRUCTION OF POLYCHLORINATED BIPHENYL COMPOUNDS, POLYCHLORINATED DIBENZO-p-DIOXIN, AND POLYCHLORINATED DIBENZOFURAN CONTAMINATED SLUDGES AND SOILS

摘要

A method or process is provided for treating contaminated sludge or soil that includes adsorbed polychlorinated biphenyl compounds (PCB) and polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (collectively termed “dioxin-furans compounds”), the method includes pulverizing the sludge or soil and thereafter directing the sludge or soil to an extraction tank where the PCB and dioxin-furan compounds are extracted from the sludge or soil and are caused to become dissolved in a solvent. The treated sludge or soil is separated from the solvent and the solvent is subjected to an ultraviolet irradiation process that destroys the PCB and dioxin-furan compounds.

主权项

1. A method of treating contaminated sludge having adsorbed PCB and dioxin-furan compounds wherein the sludge includes contaminated sludge particles comprising:
removing water from the contaminated sludge; increasing the surface area of the contaminated sludge particles; after removing water from the contaminated sludge and increasing the surface area of the sludge particles, mixing the sludge particles with a solvent and extracting the PCB and dioxin-furan compounds from the sludge particles into the solvent to produce treated sludge particles; after extracting the PCB and dioxin-furan compounds from the contaminated sludge particles, filtering the solvent to remove the treated sludge particles; and after removing the treated sludge particles from the solvent, destroying the PCB and dioxin-furan compounds in the solvent by irradiating the solvent with ultraviolet light.