Degradation of tert-Butyl Methyl Ether (MTBE) by Oxidation Processes

Abstract

Degradation of aqueous MTBE solutions by advanced oxidation processes are reviewed. The processes are based on the formation of reactive intermediates, in particular ^•OH radicals, which readily react with organic compounds. The processes discussed are the oxidation of MTBE with O₃ or O₃/H₂O₂, the Fenton reagent, potassium permanganate and potassium peroxodisulfate. Photochemical processes include UV photolysis with H₂O₂ and O₃, photocatalytic TiO₂/H₂O₂ oxidation, photo-Fenton reaction, and sonolysis. Recent studies provide additional information on the course of the above processes and factors determining their efficiency (process parameters, effects of contaminants such as aromatic and chlorinated compounds and radical scavengers). A technological and economical comparison of the O₃/H₂O₂ and H₂O₂/UV oxidations with conventional methods (air stripping and carbon adsorption) groundwater decontamination is presented and discussed.