title: Fenton-like initiation of a toluene transformation mechanism.
abstract: In Fenton-driven oxidation treatment systems, reaction intermediates derived from parent compounds can play a significant role in the overall treatment process. Fenton-like reactions in the presence of toluene or benzene, involved a transformation mechanism that was highly efficient relative to the conventional Fenton-driven mechanism. A delay in hydrogen peroxide (H2O2) reaction occurred until the complete or near-complete transformation of toluene or benzene and involved the simultaneous reaction of dissolved oxygen. This highly efficient transformation mechanism is initiated by Fenton-like reactions, and therefore dependent on conventional Fenton-like parameters. Results indicated that several potential parameters and mechanisms did not play a significant role in the transformation mechanism including electron shuttles, Fe chelates, high valent oxo-iron complexes, anionic interferences in H2O2 reaction, and H2O2 formation. The Fenton-like initiation, formation, and propagation of a reaction intermediate species capable of transforming toluene, while simultaneously inhibiting H2O2 reaction is the most viable mechanism.
authors.affiliation: U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, Robert S. Kerr Environmental Research Center, P.O. Box 1198, Ada, OK 74820, United States. huling.scott@epa.gov
authors.forename: Scott G
authors.initials: SG
authors.lastname: Huling
authors.forename: Sangchul
authors.initials: S
authors.lastname: Hwang
authors.forename: Dennis
authors.initials: D
authors.lastname: Fine
authors.forename: Saebom
authors.initials: S
authors.lastname: Ko
mesh_terms: D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D007700:Kinetics; D014050:Toluene / Q000737:chemistry*
chemical_list: D014050:Toluene; D006861:Hydrogen Peroxide; D007501:Iron