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Showing 1 to 18 of 18 for “"Fenton's"”.
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Application of Fenton's reagent as an in-situ remediation technique : an analysis of Fenton's reaction kinetics as applied to contaminant plume FS-12 at the Massachusetts Military Reservation
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Treatment of oil-water emulsion from the machinery industry by Fenton's reagent
… emulsion from the machinery industry using Fenton's reagent was investigated. The optimal [H 2 O 2 ]/[Fe 2+ ] molar ratio for COD removal was 3. An orthogonal test was designed based on the optimal molar [H 2 O 2 ]/[Fe 2+ ] ratio to evaluate the significance of four parameters relevant to …
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Characteristics and Treatment of Landfill Leachate and Optimization of Leachate Oxidation with Fenton's Reagent
… and combined filtration/fentons. These processes were tested for their ability to remove BOD and TOC and also to evaluate the improvement in UV transmittance. It was found that coagulation; Ultrafiltration and Ultrafiltration combined with coagulation do not work in …
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A high-performance liquid chromatography system with Fenton's reagent for detection of gas-phase hydrogen peroxide
… to dihydroxybenzoic acid, sodium salts by using Fenton's reagent (a mixture of H2O2 and ferrous iron) under the proper conditions. Hydroxyl radicals generated from Fenton's reagent will react with sodium salicylate and generate 2,3-, 2,4-, and 2,5-dihydroxybenzoic acid (sodium salts), which can …
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A Non-isolated Half Bridge Buck-based Converter For Vrm Application And Small Signal Modeling Of A Non-conventional Two Phase Bu
… In the first part, ferrate was compared to Fenton's reagent for the purpose of removing non-biodegradable organic compounds from mature leachate. Oxidation conditions (time, pH, and dose) were optimized to yield maximum organic removal using two leachate samples from 20 and 12-year old solid …
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The removal of color and DOC from segregated dye waste streams using ozone and Fenton's reagent followed by biotreatment
… molecular ozone, base-promoted ozonation, and Fenton’s reagent (Fe²⁺ and H₂O₂). The ADMI color value of the solutions was used as the primary parameter for color comparison and dissolved organic carbon (DOC) removal was the measure of the effect of biodegradation. Three different waste streams …
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Advanced Technologies for Resource Recovery and Contaminants Removal from Landfill Leachate
… incorporation of FO, HA recovery, and Fenton's oxidation to enhance leachate treatment and to reduce Fenton's reagent requirements. This led to the investigation of harmful disinfection byproducts (DBPs) formation during Fenton's oxidation of landfill leachate. The removal of leachate …
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Continuous color removal from concentrated dye waste discharges using reducing and oxidizing chemicals: a pilot plant study
… dyeing, and to remove metals and DOC using Fenton's Reagent or the reductive chemicals, thiourea dioxide and sodium hydrosulfite. For the Fenton's Reagent studies, ferrous sulfate was premixed with the dye waste concentrate before overflowing to the first reactor. A feedback control system …
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Morphological and Mechanical Properties of Dispersion-Cast and Extruded Nafion Membranes Subjected to Thermal and Chemical Treatments
… dispersion-cast Nafion® subjected to an ex-situ, Fenton's chemical degradation test. Nafion®, a perfluorosulfonate ionomer, is considered a commercially successful semi-crystalline ionomer with primary applications in chlor-alkali cells and proton exchange membrane fuel cells. With the aid of …
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An investigation into the use of ultrasound in the synthesis of fine chemicals
… 2,2,4,4-tetramethylhexa-1,6- dioic acid) using Fenton's reagent is described. Various parameters of the reaction were investigated (gas, equivalents of reagents, temperature, and sonication) and their effect on the yield of TMAA is discussed. Separation of the reaction mixture into TMAA (dimer) …
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The iron-dependent cyanide and hydrogen peroxide co-toxicity in Escherichia coli and its catastrophic consequences for the chromosome
… highly reactive hydroxyl radicals (•OH) via Fenton’s reaction that can damage various biomolecules causing oxidative stress. Even though at concentrations higher than 20 mM H2O2 by itself can efficiently kill micro-organisms, it is metabolically impossible for eukaryotic cells to generate …
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An Investigation of the destruction of ion exchange resins
… project. Thus, a method involving the use of Fenton's Reagent (Hydrogen Peroxide/soluble Iron catalyst) to destroy the resin by wet oxidation has been developed. This process converts 95% of the solid resin to gaseous CO2, thus greatly reducing the volume of radioactive waste that has to be …
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The analysis of salt resistant surfactants used in enhanced oil recovery.
… this thesis the chemical oxidation of NPEOS used Fenton's reagent and biological oxidation of NPEOS using a microorganism (Paracoccus halodenitrificans) is reported. The intermediate products formed in the chemical oxidation have been identified and characterized by LC, LC-ES-MS and MALDI/MS …
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Photochemistry of single-walled carbon nanotubes in the aquatic environment, and their extraction from soils
… in dark samples, suggested some metal-catalyzed Fenton's reaction was occurring in the absence of light. ^ Although direct photochemical transformation of unfunctionalized SWCNTs is very slow, direct photochemical transformation of aqueous suspensions of CSWCNTs occurs. Headspace analysis on …
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Conventional and Advanced Thermal Hydrolysis in Sewage Sludge Pre-treatment
… overcome the challenges of THP. By incorporating Fenton's peroxidation, ATHP can be operated under milder conditions. This approach helps alleviate energy consumption, mitigate the impact on sludge colour, and minimise the production of refractory dissolved organic substances. In this study, a …
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Surface Catalyzed Fenton Treatment of bis(2-chlorethyl) ether (BCEE), bis(2-chloroethoxy) methane (BCEM) and 1,2-dichloroethane (1,2-DCA)
… the potential feasibility of surface catalyzed Fenton treatment to remediate soil and groundwater contaminated with bis(2-chloroethyl ether (BCEE), bis(2-chloroethoxy) methane (BCEM), and 1,2-dichloroethane (1,2-DCA) among other contaminants. Parameters that affect the contaminant loss rate such …
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Synthesis and Characterization of Linear and Crosslinked Sulfonated Poly(arylene ether sulfone)s: Hydrocarbon-based Copolymers as Ion Conductive Membranes for Electrochemical Systems
… decreased water uptake and longer durability in Fenton's reagent. A series of linear and crosslinked copolymers were investigated with respect to their potential for use as membranes for desalination of water by electrodialysis and reverse osmosis. The crosslinked membranes were prepared by …
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Membrane Distillation for Leachate Treatment with Fenton Pre-Coagulation Treatment Process
… distillation (MD) has been used along with Fenton treatment process for pre-coagulation to achieve an effective removal of contaminants. MD is a technology derived with vapor pressure difference across the hydrophobic membrane which traps the feed-wastewater vapor at the entrance of the …