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Chemical destruction of MTBE using Fenton's reagent: effect of ferrous iron/hydrogen peroxide ratio.
Water Sci Technol. 2003; 47(9):165-71.WS

Abstract

In previous laboratory experiments Fenton's Reagent (FR) was successfully used as the source of hydroxyl radicals (OH*) for chemical treatment of low concentrations of methyl tert-butyl ether (MTBE) in water. Although under certain conditions MTBE degradation levels as high as 99.99% were achieved, none of these experiments resulted in complete MTBE mineralization. In all cases, these experiments applied FR as an equimolar concentration of ferrous iron (Fe2+) and hydrogen peroxide (H2O2). The present study investigates the effect of H2O2/Fe2+ molar ratio on the extent of degradation of MTBE and intermediate products in water at pH = 3.0. The initial concentration of MTBE studied was 0.0227 mM (approximately 2 mg/L). Initially, the dose of Fe2+ was kept constant at a Fe2+/MTBE molar ratio of 10:1 and the dose of H2O2 was varied to achieve different H2O2/Fe2+ molar ratios. The results revealed that higher degradation efficiency was achieved when FR was used as an equimolar mixture (H2O2/Fe2+ molar ratio = 1.0). The extent of MTBE degradation decreased when the H2O2/Fe2+ molar ratio was changed to values higher or lower than 1.0. These results suggest that a stoichiometric relationship (1:1) between the FR components optimizes the degradation process for this reactant system. It is hypothesized that an excess of H2O2 enhances the effect of reactions that scavenge OH*, while a decreased amount of H2O2 would be a limiting factor for the Fenton Reaction.

Authors+Show Affiliations

Department of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

12830956

Citation

Burbano, A, et al. "Chemical Destruction of MTBE Using Fenton's Reagent: Effect of Ferrous Iron/hydrogen Peroxide Ratio." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 47, no. 9, 2003, pp. 165-71.
Burbano A, Dionysiou D, Suidan M, et al. Chemical destruction of MTBE using Fenton's reagent: effect of ferrous iron/hydrogen peroxide ratio. Water Sci Technol. 2003;47(9):165-71.
Burbano, A., Dionysiou, D., Suidan, M., & Richardson, T. (2003). Chemical destruction of MTBE using Fenton's reagent: effect of ferrous iron/hydrogen peroxide ratio. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 47(9), 165-71.
Burbano A, et al. Chemical Destruction of MTBE Using Fenton's Reagent: Effect of Ferrous Iron/hydrogen Peroxide Ratio. Water Sci Technol. 2003;47(9):165-71. PubMed PMID: 12830956.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chemical destruction of MTBE using Fenton's reagent: effect of ferrous iron/hydrogen peroxide ratio. AU - Burbano,A, AU - Dionysiou,D, AU - Suidan,M, AU - Richardson,T, PY - 2003/7/2/pubmed PY - 2003/10/8/medline PY - 2003/7/2/entrez SP - 165 EP - 71 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 47 IS - 9 N2 - In previous laboratory experiments Fenton's Reagent (FR) was successfully used as the source of hydroxyl radicals (OH*) for chemical treatment of low concentrations of methyl tert-butyl ether (MTBE) in water. Although under certain conditions MTBE degradation levels as high as 99.99% were achieved, none of these experiments resulted in complete MTBE mineralization. In all cases, these experiments applied FR as an equimolar concentration of ferrous iron (Fe2+) and hydrogen peroxide (H2O2). The present study investigates the effect of H2O2/Fe2+ molar ratio on the extent of degradation of MTBE and intermediate products in water at pH = 3.0. The initial concentration of MTBE studied was 0.0227 mM (approximately 2 mg/L). Initially, the dose of Fe2+ was kept constant at a Fe2+/MTBE molar ratio of 10:1 and the dose of H2O2 was varied to achieve different H2O2/Fe2+ molar ratios. The results revealed that higher degradation efficiency was achieved when FR was used as an equimolar mixture (H2O2/Fe2+ molar ratio = 1.0). The extent of MTBE degradation decreased when the H2O2/Fe2+ molar ratio was changed to values higher or lower than 1.0. These results suggest that a stoichiometric relationship (1:1) between the FR components optimizes the degradation process for this reactant system. It is hypothesized that an excess of H2O2 enhances the effect of reactions that scavenge OH*, while a decreased amount of H2O2 would be a limiting factor for the Fenton Reaction. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/12830956/Chemical_destruction_of_MTBE_using_Fenton's_reagent:_effect_of_ferrous_iron/hydrogen_peroxide_ratio_ L2 - https://medlineplus.gov/iron.html DB - PRIME DP - Unbound Medicine ER -