Chemical oxidation and biological attenuation process for the treatment of contaminated media

摘要

A method for the removal of semi-volatile organic compounds in soils, sludges, groundwater, process water, and wastewater is presented. Oxidation and biological attenuation processes utilize persulfates and other oxidants with trivalent metals, such as ferrous iron or Mn3+, as activators. The resulting chemical oxidation process yields degradation compounds which facilitate further attenuation via biological processes.

主权项

1. A method for chemical oxidation followed by a biological attenuation process of an environmental medium containing one or more contaminants, the method comprising,
introducing persulfate and one or more trivalent metals into the environmental medium, wherein the one or more trivalent metals activate the persulfate in order to chemically oxidize the one or more contaminants, wherein amount of the persulfate is selected to chemically oxidize the one or more contaminants and amount of the one or more trivalent metals is between approximately 17-30% of molecular weight of the persulfate so that at conclusion of the chemical oxidation sufficient residual sulfate and sufficient residual trivalent metals remain such that: naturally occurring facultative cultures utilize the residual sulfate and the residual trivalent metal as terminal electron acceptors to promote the biological attenuation process of the one or more contaminants; and the residual sulfate and the residual trivalent metal prevent formation and accumulation of hydrogen sulfide which is a toxin to the facultative cultures.