Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 144 for “"Fenton"”.
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Lignocellulose deconstruction using glyceline and a chelator-mediated Fenton system
… biomass components, and 2) a chelator-mediated Fenton reaction (CMF) that chemically modifies the nanostructure of the cell wall through a non-enzymatic cell wall deconstruction. After pretreatment, utilizing analytical techniques such as nuclear magnetic spectroscopy, wide angle x-ray …
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Hydroxyl radical production via the photo-Fenton reaction in natural waters
… investigates the importance of photo-Fenton chemistry in natural waters. The Fenton reaction, H202 + Fe(ll) [right arrow] Fe(ll) + OH- + OH', can occur in sunlit waters because both H202 and Fe(ll) are photo-chemically produced. Photo-Fenton chemistry was investigated by irradiating …
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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 …
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Landfill leachate treatment by combination of electro - fenton and sequencing batch reactor method
… determine the effectiveness of combined electro-Fenton and sequencing batch reactor (SBR) method on the removal of SS, colour, COD and NH3-N. The experimental involved three major parts were coagulation-flocculation, electro-Fenton and SBR method. This process could be operated independently in a …
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Environmental Remediation with Fenton Reagents and Synthesis of a Novel Halide Fluorescence Sensor
Suwannee River fulvic acid (SRFA) and humic acid (SRHA) were used as dissolved organic matter (DOM) and were applied to probe the effect of DOM. Addition of DOM resulted in decreased first order rate constants for all species selected. The inhibition became more significant as the hydrophobicity of …
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Application of a Novel Heterogeneous Fenton Catalyst in the Treatment of BTEX-Contaminated Waters
… PAN-(Fe3+) system as a heterogeneous Fenton catalyst has been investigated in this work and the results show that the heterogeneous Fenton catalyst is a suitable technology for the effective oxidation of organic compounds. When the heterogeneous Fenton system was applied towards the …
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Degradation Of Selected Organic Agrochemicals In Artificial Soil Slurry Systems By Anodic Fenton Treatment
… thesis investigated the application of anodic Fenton treatment to the degradation of several probe agrochemicals in model soil slurry systems. A kinetic model, called the slurry AFT model, was developed to describe the degradation process in the slurry system. Effects of different model soil …
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A study of the Georgia State Department of Education's ban on textbooks by Edwin Fenton
… were social studies textbooks edited by Edwin Fenton, John M. Good, and others at the Carnegie-Mellon Center for Project Social Studies. These textbooks were an effort by Fenton and his associates to meet the demands for change in social studies curriculum and related instructional materials. …
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Estudo da degradação do corante amarelo ouro remazol RNL 133% através do processo foto-Fenton
… Ouro Remazol RNL 133% utilizando o processo foto-Fenton (H2O2/Fe2+/UV), incluindo a modelagem e otimização da degradação da cor e da redução do carbono orgânico total (COT). Os experimentos foram realizados em um reator fotoquímico anular encamisado de vidro com volume irradiado de 3,0 L para um …
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The effect of selected colonic metabolites of polyphenols on the copper-triggered Fenton reaction and hemolysis
… of polyphenols on the copper-triggered Fenton reaction and hemolysis Keywords: polyphenol, metabolite, copper, Fenton reaction, hemolysis, antioxidant, pro- oxidant Copper is an essential trace biogenic element that plays a pivotal role in various physiological processes within the human …
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Enhancement in Degradation of Environmental Pollutants: Fenton Degradation of 2,4,6-Trinitrotoluene and Photodegradation of Deepwater Horizon Crude Oil
… has resulted in an urgent need for remediation. Fenton reagent provides an advanced oxidation process that is capable of remediating recalcitrant explosives, such as TNT. One drawback of Fenton chemistry is that the reaction requires acidic pH to prevent precipitation of iron. Our studies have …
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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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Targeted Degradation of Trinitrotoluene Using Iron (II)-Cyclodextrin-Peroxide Systems
… concerns. A cyclodextrin (CD) mediated Fenton remediation of TNT contaminated water and sand (soil analogy) is presented. Kinetic studies were performed to elucidate the role of cyclodextrin in Fenton remediation of TNT contaminated water. The rate and extent of TNT degraded by Fe2+- …
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Complexation of Organic Guests and Coordination of Metal Ions by Cyclodextrins: Role of Cyclodextrins in Metal-Guest Interactions
… manufacture, testing, and disposal facilities. Fenton chemistry (ferrous ion catalyzed generation of hydroxyl radicals) has shown utility in the remediation of TNT in soils but it suffers from non-specificity and the need for acidic conditions to prevent loss of iron as iron hydroxides. …
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Membrane Electrochemical Treatment of Landfill Leachate: Processes, Performance and Challenges
… consumption. The second study coupled MER with Fenton oxidation through providing synergistic benefits with the low solution pH, reduced organics, and ammonia removal. This two-stage coupled system reduced the more leachate COD than the standalone Fenton process treating raw leachate. Also, the …
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Effects of different frequencies and other variables on the salicylic acid and terephthalic acid dosimeters applied to the advanced Fenton process and activated carbon cloth
Advanced Oxidative Processes (AOPs) depend on the production of hydroxyl radicals for the destruction of organic pollutants. The effectiveness of six high ultrasound frequencies (378 kHz, 583 kHz, 862 kHz, 995 kHz, 1144 kHz, and 1175 kHz) and one low ultrasound frequency (20 kHz) for the production …
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Numerical Model Studies of Enhanced Geothermal Systems
… these parameters. A benchmark problem for the Fenton Hill Phase I EGS was numerically simulated as the first task with four runs contemplating a single planar penny shape fracture in the rockmass with a given lateral extension. The first run evaluates a constant aperture fracture while the …
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The Mechanism of Oxygen and Nitric Oxide Toxicity in Escherichia Coli
… killed cells by damaging their DNA through the Fenton reaction. NO also blocked respiration, an event which previous studies have shown can stimulate oxidative DNA damage. The resultant accumulation of NADH accelerates the reduction of free flavins by flavin reductase, and these reduced flavins …
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