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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 37 for “"magnetic separation"”.
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Electrical And Magnetic Separation Of Particles
Particle separation technologies have been utilized in many industrial fields, such as pigment and filler production, mineral processing, environmental protection, the food and beverage industry, and the chemical industry, as well as in biomedical application, such as cell biology, molecular …
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Synthesis and Characterization of Novel Polyethers and Polydimethylsiloxanes for Use in Biomaterials
… were synthesized using a high shear process and magnetic separation techniques. These one-part fluids are unique in the fact that they do not require the addition of a non-functional PDMS oligomer solvent to generate a magnetic hydrophobic fluid. A series of PDMS-magnetite nanoparticle fluids …
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Municipal Solid Waste Incineration (MSWI) Ash Characterization and Physical Concentration
… and subjected to particle size distribution, wet magnetic separation, and a float-sink test. As for the chemical and mineralogical characterization, the sample was subjected to XRD, XRF, SEM-EDX, and elemental composition analysis. Additionally, sequential chemical extraction and acid-leaching …
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The effect of microwave radiation on mineral processing
… changes in the Bond Work Index, flotability and magnetic separation. It has been shown that microwave pre-treatment is most effective for coarse grained ores with consistent mineralogy consisting of good microwave absorbers in a transparent gangue (up to a 90% decrease in Bond work index for …
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Magnetically enhanced centrifugation for continuous biopharmaceutical processing
Effective separation and purification of biopharmaceutical products from the media in which they are produced continues to be a challenging task. Such processes usually involve multiple steps and the overall product loss can be significant. As an integrative technique, high gradient magnetic …
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DEVELOPMENT OF MAGNETIC NANO-SIZE SOLID ACID CATALYSTS FOR THE PRODUCTION OF BIOFUEL
… IN THIS THESIS, NOVEL ACID-FUNCTIONALIZED MAGNETIC NANOPARTICLES (MNPS) WERE SUCCESSFULLY DEVELOPED AS ACTIVE AND RECYCLABLE SOLID ACID CATALYSTS FOR THE EFFICIENT PRODUCTION OF BIOFUEL WITH GOOD DISPERSIBILITY, HIGH ACIDITY, AND SIMPLE MAGNETIC SEPARATION.
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Colloidal magnetic fluids as extractants for chemical processing applications
The feasibility of using high gradient magnetic separation (HGMS) to separate the Fe₃0₄ nanoparticles was studied in this work. We present a general model for nanoparticle capture based on calculating the limit of static nanoparticle buildup around the collection wires in an HGMS column. Model …
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Two-dimensional and three-dimensional magnetism in ultrathin epitaxial rare-earth metal films
This thesis reports the investigation of the magnetic behavior of ultrathin epitaxial films of the heavy rare-earth elements; Gd, Er, and Dy, grown with the technique of Molecular Beam Epitaxy (MBE). By employing advanced film fabrication techniques, each magnetic rare-earth element layer, between …
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Microwave Vacuum Carbothermic Reduction and Sulphidation of a Low Grade Nickeliferous Silicate Laterite Ore
… nickeliferous silicate laterite ore, followed by magnetic separation was performed. The variables investigated included: processing time, microwave power, system pressure, use of argon as an inert gas, charcoal addition, pyrite addition, sample mass, dewatering of the sample and magnetic field …
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Enhanced copper recovery from Chingola refractory ore
… Following a literature review, high-intensity magnetic separation, direct, staged flotation, and ultrasonic enhanced leaching were identified as underexplored options for the recovery of copper. These techniques are promising due to the paramagnetic properties of most Cu-bearing minerals, the …
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Inertio- and Elasto-Magnetic Fractionation of Multiple Microparticles in Newtonian and Non-Newtonian Fluid
… We have taken advantage of inertia, magnetic, drag, and elastic forces to achieve high throughput multiplexed microparticle fractionation. The technique has been tested with respect to parameters such as size of particles, flow rate, device geometry and fluid viscosity (Newtonian vs. …
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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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Evaluation of the Potential Expansion Mechanisms of Bottom Ash in Unbound Sub-base Materials
… pH testing, microscopic examination, magnetic separation analysis, Thermogravimetry, Scanning Electron Microscopy and accelerated chemical reactions.<br/>Results showed that expansion appears to be through two mechanisms, unpredictable relaxation of compacted material and more notably …
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Microfabricated magnetophoretic focusing systems for the separation of submicrometer particles
Magnetic separation is an actively researched field due to its broad applicability to the mineral, chemical, and biological industries. The objective of this work was to design, fabricate, and test systems to study magnetophoresis of particles in suspension. To achieve this goal, two system …
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Comparison of Breien and Canonball Volcanic Tuffs in Southern North Dakota
… using grain size analysis, x-ray diffraction, magnetic separation, and grain mount petrographic analysis. </p><p>The Breien and Cannonball Tuffs have few different properties when examined by the unaided eye. By the methods available for this research, insufficient evidence was found to show …
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Preparation and applications of catalytic magnetic nanoparticles
… This research focuses on developing functional magnetic particles to carry strong [alpha]--nucleophilic groups, which are able to catalyze the decomposition reaction and can be recycled and reused.The amidoxime modified magnetic particles were prepared first. The original particles were …
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Evaluation of procedures for recovering manganese from a Carroll County, Virginia, ore
… methods such as froth flotation, sink float, and magnetic separation have not been too effective in upgrading the ore from Carroll County. Chemical procedures, such as roasting, leaching, and electrodeposition, were thought to offer a better means for the recovery of manganese from the …
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Development and Validation of a Simulator based on a First-Principle Flotation Model
… flotation products can be readily determined by magnetic separation. The experimental results are in good agreement with the model predictions both in terms of grade and recovery.
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Continuous focusing and separation of microparticles with acoustic and magnetic fields
… such as electrical fields, optical fields, magnetic fields, and acoustic fields.</p><p>However, these conventional methods often involve complex designs or strongly depend on the properties of the flow medium or the interaction between the fluid and fluidic channels, so this dissertation …
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Colloidal CoFe2O4-based nanoparticles for Magnetic Fluid Hyperthermia
… targeted therapies. Since the last two decades, magnetic nanoparticles have been proposed as potentially powerful due to their unique chemical-physical properties. Magnetic nanoparticles can be applied in a wide variety of biomedical fields from the magnetic separation and Magnetic Resonance …
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