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 14 of 14 for “"aqueous chemistry"”.
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Manipulating aqueous chemistry environments in extractive metallurgy
The Anglo Research Nickel (ArNi) process is a novel extractive metallurgical process that arose out of the need to develop a processing route for the recovery of nickel from lateritic ore deposits that is both economical and environmentally acceptable.
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Using froth flotation to mitigate acid rock drainage risks while recovering valuable coal from ultrafine colliery wastes
… Success requires integration of flotation, aqueous chemistry and mineral bioleaching expertise. The approach adopted in this exploratory study entails coal flotation in the first stage, which takes advantage of its natural hydrophobicity.
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Multinuclear NMR Studies of Gallium Complexes in Aqueous Solution.
… of gallium localization in tumor cells, the aqueous chemistry of gallium(III) was investigated by nuclear magnetic resonance (NMR) spectroscopy. Specifically, these studies include: characterization under various experimental conditions (pH, concentration, temperature etc.) of gallium citrate …
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Ultrafast structural fluctuations and rearrangements of water's hydrogen bonded network
Aqueous chemistry is strongly influenced by water's ability to form an extended network of hydrogen bonds. It is the fluctuations and rearrangements of this network that stabilize reaction products and drive the transport of excess protons through solution. Experimental observations of the dynamics …
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Implementation of Chemical Flooding Module into the General Purpose Adaptive Simulator
The objective of my research thesis was to add aqueous chemistry models to a General Purpose Adaptive Reservoir Simulator (GPAS) developed at the University of Texas. GPAS is an implicit, compositional, equation-of-state, parallel simulator that can run efficiently on a range of platforms from a …
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A geochemical investigation of the water and sediments of Barber's Pan, North West Province
… classified. Very little data is available on the aqueous chemistry of southern African saline systems, and with the exception of a few publications dealing, in part, with the soil and associated materials of pan floors and margins, soil and sediment information on pans is similarly limited. …
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A numerical study on parameters affecting boric acid transport and chemistry within fuel corrosion deposits during crud induced power shift
… crud. Previously, one-dimensional transport and chemistry models for solute in porous structure have been studied. This study aims to advance previously developed thermal hydraulics model to study boric acid transport within crud; and develop a 2-D coupled crud-chemistry and thermal hydraulics …
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Complex Fluid Dynamics: From Laminar to Geophysical Flows
… is a consequence of tight correlations between aqueous chemistry and the underlying travertine. We show how these correlations can be used to reconstruct ancient depositional environments. We also present highly successful minimal models which explain the formation of depositional facies and …
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Method for Photopolymerization 3D Printing of Recyclable Thermoplastic Polymers
… demonstrating compatibility of the proposed chemistry with off-the-shelf hardware. The capability to digitally manufacture high resolution 3D structures with IPP is demonstrated and the physical properties of the resulting composite polymer are characterized. While 3D-IPP cannot yet directly …
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Nanoscale structural/chemical characterization of manganese oxide surface layers and nanoparticles, and the associated implications for drinking water
… column tests with simulating inorganic aqueous chemistry of a typical coagulation fresh water treatment plant, where free chlorine is present across filter bed. Analytical SEM and TEM, powder and synchrotron-based XRD, XPS, and ICPMS were used for characterization of coatings, filter …
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Chemical composition and pH of marine aerosols in the summer-time marine boundary layer of the Atlantic sector of the Southern Ocean
Aerosol acidity is a fundamental parameter of aqueous chemistry that impacts the lifetime of pollutants, biogeochemical cycles, human health, and climate. However, despite this importance, the effects of aerosol pH on these processes are difficult to constrain, in part because there are no direct …
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Developing an elevated temperature Pourbaix diagram for zirconium and multi-element Pourbaix diagram of Zircaloy-4
… thermodynamic and hydrolysis properties of aqueous zirconium species have not been measured above standard conditions. This lack of information is addressed through solubility measurements and the development of elevated temperature Pourbaix (E-pH) diagrams for zirconium and Zircaloy-4. …
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Development and Evaluation of a Comprehensive Tropospheric Chemistry Model for Regional and Global Applications
… emissions must employ a tropospheric chemistry model that predicts realistic distributions of aerosols of all types. The need for a such a comprehensive yet computationally efficient tropospheric chemistry model is addressed in this research via systematic development of the various …
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Understanding the Impact of Nuclear Environment on the Hydrothermal Corrosion in SIC
… high pressure, high temperature, and aqueous chemistry. Experiments were performed under prototypical LWR conditions (Pressure, temperature, flow rate) to understand the corrosion and silica dissolution characteristics of high purity chemical vapor deposited (CVD) SiC. Sensitivity …