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 195 for “"Fe(II)"”.
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Interactions of Fe(II) with the iron oxidizing bacterium Rhodopseudomonas palustris TIE-1
… source. Previous work with the purple photoferrotroph Rhodopseudomonas palustris TIE-1 showed that three genes were required for phototrophic growth with Fe(Il): PioA, a decaheme cytochrome, PioB, an outer membrane porin, and PioC, a high potential iron protein (HiPIP). These proteins …
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The study of the degradation of hexabromocyclododecane in a heterogeneous system containing Fe(II) adsorbed to the iron oxide Hematite.
… in a heterogenous mixture containing reactive Fe(II) adsorbed to the iron oxide hematite. The adsorbed Fe(II)/iron oxide system has shown to be a potent reductant in the transformation of organic contaminants with relatively water soluble organic contaminants. There currently aren’t many …
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The performance of potassium permanganate and hydrogen peroxide oxidation and/or alum coagulation in the removal of complexed FE(II) from drinking water
… the source of DOC were investigated for their effects on the removal of complexed Fe(II) by alum coagulation and/or KMn04 and H20 2 oxidation. The differentiation between particulate, colloidal, and soluble iron species was achieved through the use of 0.2 urn filters and 100K ultrafilters. …
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The performance of free chlorine and chlorine dioxide oxidation and/or alum coagulation for the removal of complexed Fe(II) from drinking water
… The 0.45 um filter was typically used to differentiate between dissolved and particulate iron. This research investigated Fe(II) oxidation by free chlorine and ClO₂ in the presence of DOC by varying the pH, DOC to Fe ratios, DOC sources, oxidant dosages, and contact time. Complexed iron …
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Production of Light-independent Reactive Oxygen Species during Microbially-mediated Fe(II)/Fe(III) redox cycling and its Application in the Degradation of Organic Contaminants
… in aquatic systems. In the presence of Fe(II), H2O2 represents a potential source of •OH via the Fenton reaction, which is commonly used in remediation for organic contaminant degradation. The degradation of various organic contaminants during aerobic oxidation of Fe(II) species without …
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Hydrogen peroxide mediated oxidation of ferrous iron and associated production of hydroxyl radicals in natural aquatic systems
The oxidation kinetics of ferrous iron, Fe(II), in natural aquatic systems is of interest due to both its importance to the biogeochemistry of iron, a critical micronutrient, and also due to the formation of reactive oxygen species (ROS) during these oxidation reactions. The most important oxidants …
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Iron Reduction in Soot
Ferrous iron (Fe(II)) has been implicated as one contributor in the generation of reactive oxygen species (ROS) from ambient particles emitted during the incomplete combustion of fossil and biomass fuels. Although ROS are known to induce unhealthy oxidative stress in cellular systems, the …
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Trace Element Cycling during Iron(II)-activated Recrystallization of Iron(III) Oxide Minerals
… secondary abiotic reactions between aqueous Fe(II) and Fe(III) oxide minerals, which results in dynamic recrystallization via simultaneous Fe(II) oxidative adsorption and Fe(III) reductive dissolution. Fe(III) oxide minerals are abundant in soils, sediments, and groundwater systems, and often …
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Physical chemistry of microbially-reduced smectites
… of bacteria to reduce smectite structural Fe and the effect microbial reduction has on clay swelling, flow behavior, and the crystal structure was studied to better understand the reduction process. Structural Fe reduction by combinations of Pseudomonas bacteria is a diffusion driven …
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Modeling Groundwater Denitrification by Ferrous Iron Using PHREEQC
… health risks. Denitrification, the only effective process to eliminate nitrate, is limited by the abundance of biologically available electron donors. Thus, understanding the natural denitrification capacity of aquifers, through the analysis of all the major electron donors, is essential. …
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Degradation of groundwater contaminants by iron containing systems.
Iron-containing systems are effective at reducing common groundwater contaminants. Zero-valent iron particles are an effective remediation technology for groundwater contaminated with halogenated organic compounds. Iron salts were used to generate iron oxide nanoparticles, which were reduced to …
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Mechanistic Study of Pollutant Degradation
… mechanism of organic pollutant degradation in Fenton reactions and sonochemical reactions. Fenton degradation uses hydroxyl radical to oxidize organic compounds. The radical is produced by catalytic decomposition of hydrogen peroxide with Fe(II). Further research has found that addition of …
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Bioavailable Iron in Equatorial Pacific Ocean Aerosol Samples
Oceanic iron (Fe) fertilization experiments performed in remote regions have established that Fe additions draw carbon into the ocean, at least over the months-long time frame of the experiments. However, the mechanisms that control Fe speciation in atmospheric aerosol particles before and after …
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In vitro selection and characterization of mono-, di-, and trivalent metal-dependent DNAzymes and their sensing applications
… including binding to a wide variety of different ligands and catalysis of many different chemical reactions. Due to the superior properties of functional nucleic acids, they have found particular interest in environmental sensing and monitoring, biomedical diagnostics and therapy. Iron is a …
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