Chemical destruction of MTBE using Fenton's Reagent: effect of ferrous iron/hydrogen peroxide ratio

2003 ◽  
Vol 47 (9) ◽  
pp. 165-171 ◽  
Author(s):  
A. Burbano ◽  
D. Dionysiou ◽  
M. Suidan ◽  
T. Richardson
Keyword(s):  
Hydrogen Peroxide ◽  
Ferrous Iron ◽  
Degradation Process ◽  
Methyl Tert Butyl Ether ◽  
Molar Ratio ◽  
Limiting Factor ◽  
Fenton’S Reagent ◽  
Butyl Ether ◽  
Fenton's Reagent ◽  
Mtbe Degradation

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.

Comparison Between the Classical and the Electrochemical Fenton Systems for Atrazine Degradation in Acidic Medium

2002 ◽  
Vol 5 (1) ◽  
Author(s):  
A. Ventura ◽  
G. Jacquet ◽  
V. Camel ◽  
A. Bermond
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Compound ◽  
Ferrous Iron ◽  
Acidic Medium ◽  
Chemical Oxidation ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Refractory Compounds ◽  
Electrochemical Fenton ◽  
Fenton System

AbstractThe degradation of chemicals in water is commonly performed using chemical oxidation. In case of refractory compounds, hydroxyl radicals have to be involved for their degradation. Several systems may be used to generate OH°, such as the ferrous iron-hydrogen peroxide system (Fenton’s reagent). However, when this reagent is prepared by mixing the two constituents, the oxidation of an organic compound is difficult to control and the ferrous iron regeneration is limited. So, very recently, electrochemical systems have merged that allow the electrochemical production of ferrous iron and/or hydrogen peroxide, thereby allowing the generation of OH°. In this paper, the efficiency of a simple electro-Fenton system in degrading chemicals in acidic medium is shown. Atrazine was chosen as a model organic compound. In addition, the electrochemical system compared favorably with the classical Fenton’s reagent under similar conditions, as it allowed a more thorough oxidation of atrazine.

THE DEMETHYLATION OF SUGARS WITH HYDROGEN PEROXIDE

1961 ◽  
Vol 39 (3) ◽  
pp. 555-563 ◽  
Author(s):  
B. Fraser-Reid ◽  
J. K. N. Jones ◽  
M. B. Perry
Keyword(s):  
Hydrogen Peroxide ◽  
Ferrous Iron ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Methyl Methyl ◽  
Methyl Derivatives ◽  
Derivatives Of

Demethylation of methylated sugars can be achieved using hydrogen peroxide and ferrous iron (Fenton's reagent). The reaction is not specific and further oxidation of the sugar also occurs. The preparation of 3,4-di-O-methyl-D-mannose from the corresponding mannitol derivative is described. Mono-O-methyl derivatives of D-mannose and of D-mannitol as well as D-mannose and D-mannitol were also produced. The course of the demethylation of 2,3,4,6-tetra-O-methyl methyl α-D-glucoside by Fenton's reagent has been examined.

Coagulation of textile secondary effluents with Fenton's reagent

1997 ◽  
Vol 36 (12) ◽  
pp. 215-222 ◽  
Author(s):  
Shyh-Fang Kang ◽  
Huey-Min Chang
Keyword(s):  
Hydrogen Peroxide ◽  
Cod Removal ◽  
Color Removal ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Effluent Standards ◽  
Secondary Effluents ◽  
Removal Efficiencies

This study was designed to use both artificial and real textile secondary effluents to evaluate (1) the COD and color removal efficiencies for ferrous coagulation and Fenton's coagulation, and (2) the feasibility of using hydrogen peroxide to improve ferrous coagulation to meet more stringent effluent standards. The results indicate that the optimum pHs for both ferrous coagulation and Fenton's preoxidation processes range between 8.0–10 and 3.0–5.0, respectively. The rate for color removal is faster than that for COD removal in the Fenton's preoxidation process. The removals of COD and color are mainly accomplished during Fenton's preoxidation step. The ratio of COD removal for Fenton's coagulation versus ferrous coagulation, given the same ferrous dosage, ranges from 1.4 to 2.3, and it ranges from 1.1 to 1.9 for color removal, using two effluent samples. Therefore, using hydrogen peroxide can enhance the ferrous coagulation, and this ensures more stringent effluent standards of COD and color are met.

scholarly journals Bench-Scale Study of Aqueous MTBE Degradation by Combined Advanced Oxidation and Biological Processes

2021 ◽  
Author(s):  
Azadeh Asadi
Keyword(s):  
Biological Treatment ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Methyl Tert Butyl Ether ◽  
Molar Ratio ◽  
Second Phase ◽  
Biological Processes ◽  
Butyl Ether ◽  
Pre Treatment ◽  
Total Residence Time

The oxidation of methyl tert-butyl ether (MTBE) by advanced oxidation processes in conjunction with biological treatment in investigated. Firsst, the degradation of MTBE by UV/H2O2 and UV/TiO2 is studied. It is found that the optimum molar ratio or H2O2/MTBE is about 14 while the optimum concentration of TiO2 is 1.5 g/L. In addition, it is observed that a combined process of UV/H2O2 and UV/TiO2 does not have any advantage over each of these processes alone. In the second phase, biodegradability of MTBE by aerobic microorganisms is evaluated in three different approaches including BODu assessment, removal of MTBE by non-acclimated, and acclimated microorganisms. It is shown that the acclimatization of microorganisms enhances the rate of biodegradation of MTBE. Finally, it is observed that the rate of bioreaction is not improved after a photochemical pre-treatment. It is also found that using the integration of photochemical and biological treatment reduced the total residence time.

Effect of Contaminant Hydrophobicity in the Treatment of Contaminated Soils by Catalyzed H2O2 Propagations (Modified Fenton’s Reagent)

2008 ◽  
Vol 11 (2) ◽  
Author(s):  
Richard J. Watts ◽  
Tanya M. Haeri-McCarroll ◽  
Amy L. Teel
Keyword(s):  
Hydrogen Peroxide ◽  
Contaminated Soils ◽  
Fenton’S Reagent ◽  
Fenton's Reagent

AbstractThe effect of contaminant hydrophobicity on hydrogen peroxide dosage requirements in the treatment of contaminated soils using catalyzed H

scholarly journals Characterization of co-metabolic biodegradation of methyl tert-butyl ether by a Acinetobacter sp. strain

RSC Advances ◽  
2019 ◽  
Vol 9 (67) ◽  
pp. 38962-38972
Author(s):  
Shanshan Li ◽  
Dan Wang ◽  
Dan Du ◽  
Keke Qian ◽  
Wei Yan
Keyword(s):  
Batch Reactor ◽  
Methyl Tert Butyl Ether ◽  
Fed Batch ◽  
Butyl Ether ◽  
Tert Butyl ◽  
Acinetobacter Sp ◽  
Mtbe Degradation

Acinetobacter sp. SL3 could co-metabolically degrade MTBE when grown on n-alkanes. An extremely low TBA accumulation were achieved on n-octane. The fed-batch reactor degradation revealed continuous MTBE degradation capacity by Acinetobacter sp. SL3.

scholarly journals Biodegradation of Methyl tert-Butyl Ether by a Pure Bacterial Culture

2001 ◽  
Vol 67 (12) ◽  
pp. 5601-5607 ◽  
Author(s):  
Paul B. Hatzinger ◽  
Kevin McClay ◽  
Simon Vainberg ◽  
Marina Tugusheva ◽  
Charles W. Condee ◽  
...  
Keyword(s):  
Bacterial Culture ◽  
Butyl Alcohol ◽  
The Other ◽  
Methyl Tert Butyl Ether ◽  
Butyl Ether ◽  
Pure Bacterial Culture ◽  
Degradation Activity ◽  
Type Strains ◽  
Mtbe Degradation ◽  
Allyl Thiourea

ABSTRACT Biodegradation of methyl tert-butyl ether (MTBE) by the hydrogen-oxidizing bacterium Hydrogenophaga flavaENV735 was evaluated. ENV735 grew slowly on MTBE ortert-butyl alcohol (TBA) as sole sources of carbon and energy, but growth on these substrates was greatly enhanced by the addition of a small amount of yeast extract. The addition of H2 did not enhance or diminish MTBE degradation by the strain, and MTBE was only poorly degraded or not degraded by type strains of Hydrogenophaga or hydrogen-oxidizing enrichment cultures, respectively. MTBE degradation activity was constitutively expressed in ENV735 and was not greatly affected by formaldehyde, carbon monoxide, allyl thiourea, or acetylene. MTBE degradation was inhibited by 1-amino benzotriazole and butadiene monoepoxide. TBA degradation was inducible by TBA and was inhibited by formaldehyde at concentrations of >0.24 mM and by acetylene but not by the other inhibitors tested. These results demonstrate that separate, independently regulated genes encode MTBE and TBA metabolism in ENV735.

scholarly journals Topical and prospective processes of acetoxylation

2009 ◽  
Vol 11 (4) ◽  
pp. 46-51 ◽  
Author(s):  
Grzegorz Lewandowski ◽  
Marcin Bartkowiak ◽  
Eugeniusz Milchert
Keyword(s):  
Hydrogen Peroxide ◽  
Short Description ◽  
Methyl Tert Butyl Ether ◽  
Butyl Ether ◽  
Allyl Acetate ◽  
Tert Butyl ◽  
Oxidative Acetoxylation

Topical and prospective processes of acetoxylation The latest acetoxylation processes have been described in this work: oxidative acetoxylation of propene to allyl acetate, acetoxylation of propene to propene glycol and its acetates, acetoxylation of methyl tert-butyl ether and oxidative acetoxylation of cyclohexene by hydrogen peroxide. Acetoxylation of 1,3-butadiene, isobutene and toluene were presented together with a short description of the acetoxylation catalysts.

Sign in / Sign up

Export Citation Format

Share Document