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 353 for “"iron oxide"”.
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Heavy metal adsorption on iron oxide and iron oxide-coated silica : macroscopic, spectroscopic, and modeling studies
… minerals. Two important surfaces are iron oxide and silica, which are ubiquitous and associated with one another in the environment playing important roles in metal distribution. The objectives of this research are to develop models for predicting speciation and mobility of toxic trace …
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Heat Transfer Enhancement using Iron Oxide Nanoparticles
Two different iron oxide nanofluids were tested for heat transfer properties in industrial cooling systems. The nanofluids either had 30 nm particles with a wide size distribution to include particles greater than 1 micrometer or 15 nm particles with greater than 95% of the particles less than 33 …
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Iron Oxide Nanoparticle Surface Modification: Synthesis and Characterization
… of interest within the scientific community. Iron oxide nanoparticles, specifically those based on iron (II, III) oxide (magnetite, Fe3O4), have been prominently investigated for biomedical, theranostic applications due to their documented superparamagnetism, high biocompatibility, and other …
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Engineering Superparamagnetic Iron Oxide Nanoparticles for Environmental Applications
<p>Engineered, superparamagnetic iron oxide nanoparticles (IONPs) have drawn considerable research attention for a broad range of applications based on tunable size and shape, surface chemistries, and magnetic properties. For successful aqueous-based, environmental applications, it is necessary to …
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Iron oxide amended biosand filters for virus removal
… were performed to determine if the addition of iron oxides throughout biosand filter (BSF) media would increase virus removal due to adsorption. The proposed mechanism is electrostatic adsorption of negatively charged virion particles to positively charged iron oxides formed during the corrosion …
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Magnetic resonance thermometry with superparamagnetic iron oxide nanoparticles
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
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Electrochemically enhanced reduction of iron oxide from slag
… performed to measure the rate of reduction of iron oxide from calcia-silica-alumina slag by carbon in iron, and to determine whether the reaction rate can be increased by electrochemical means. It is shown that the reaction rate depends on both the ferric-ferrous cation ratio, and on the total …
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Polymer-coated iron oxide nanoparticles for medical imaging
… materials used in medicine are polymer-coated iron oxide nanoparticles. This dissertation describes several formulations for in vivo imaging applications. The paramagnetic polymer-coated iron oxide nanoparticle aminoSPARK is used as a fluorescence-mediated tomography (FMT) imaging agent for …
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Iron-oxide catalyzed silicon photoanode for water splitting
… for water splitting using silicon and iron-oxide. The fundamental limitations of silicon to water splitting applications were overcome by an ultrathin iron-oxide film stack and a pH-adjusted electrochemical environment. It was experimentally demonstrated that this functional photoanode …
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Arsenic mobilization through bioreduction of iron oxide nanoparticles
… sorbs strongly to the surfaces of Fe(III) (hydr)oxides. Under aerobic conditions, oxygen acts as the terminal electron acceptor in microbial respiration and Fe(III) (hydr)oxides are highly insoluble, thus arsenic remains associated with Fe(III) (hydr)oxide phases. However, under anaerobic …
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In Situe Synthesis of Iron Oxide within Polyvinylamine nanoparticles
… polyvinylamine (PVAm) nanoparticles containing iron oxide. These polymeric nanoparticles offer colloidal stability and reactive primary amines for drug conjugation or surface modification. The polymer-magnetite nanoparticles described in this thesis exhibited a maximum of 12% wt. magnetite and a …
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Design of Iron Oxide-Flavin Nanocomposite Bacterial Cellulose Hydrogels
… Cellulose is capable of coordinating to metal oxides such as magnetic iron oxide nanoparticles (IONPs). When IONPs are coupled to flavins, naturally occurring photoactive isoalloxazine compounds, a heterogenous photocatalytic system is created that can integrate into BC, thus forming nanohybrid …
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Surface modifications of iron oxide nanoparticles for biological applications
Iron oxides magnetic nanoparticles (MPs) of high crystallinity, high magnetization, and size-monodispersity were synthesized with oleic acid as their native ligands. These hydrophobic and non-functionalized MPs have magnetic properties that are suitable for various biological applications. Surface …
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Clay colloid mobilization in an iron oxide-coated sand
… Institute of Technology, Dept. of Civil and Environmental Engineering, 1992.
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Shape dependent iron oxide nanoparticles for simultaneous imaging and therapy
… is to explore the use of shape dependent iron oxide nanoparticles as magnetic resonance imaging contrast agents. In addition to biocompatibility, nanoparticles provide a foundation for implementing imaging guided drug delivery systems. We begin with the synthesis of iron oxide …
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Surface functionalized iron oxide nanoparticles for applications in biomedical sciences
This thesis focuses on the functionalization of iron oxide nanoparticles (Fe3O4) and their applications in biomedical sciences. Each chapter represents an independent research project that has been conducted within a different collaboration. For each project, magnetic Fe3O4 iron oxide nanoparticles …
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Sorption of Metals onto Natural Sediments and Engineered Iron Oxide Nanoparticles
<p>Metal contamination of subsurface environments and engineered water systems can be derived from natural processes and anthropogenic activities associated with industrial processes, past weapons production, and mining works. The toxic and carcinogenic effects of uranium and chromium pose a …
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Development of Iron Oxide Based Nanoparticles as Dual-Modality Imaging Probes
… to the core of dextran-coated superparamagnetic iron oxide nanoparticles (NUSPIONs). The synthesized nanoparticles were characterized by dynamic light scattering (DLS), transmission electron microscope (TEM), atomic force microscope (AFM), and high performance liquid chromatography (HPLC). The …
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Contaminant reduction by iron oxide nanoparticles: Environmental variables and evolving reactivity
Iron oxide nanoparticles are a promising resource for solving some of today’s most pressing global challenges in the developed and developing world, including the removal of toxins from drinking water resources, treatment of mining wastes, and remediation of groundwater contaminated by industrial …
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Magnetic iron oxide nanoparticles: synthesis, characteristics, magnetic behavior, and biomedical applications
Magnetic iron oxide nanoparticles are attracting increasing attention due to their interesting properties that can be applied in a great number of applications such as catalysis and biomedicine. This thesis focuses on the synthesis, characteristics, and biomedical applications of iron oxide …
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