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Filtering by: Alternative title ssim The redox chemistry of neptunium in gamma-irradiated aqueous nitric acid in the presence of an organic phase Remove constraint Alternative title ssim: The redox chemistry of neptunium in gamma-irradiated aqueous nitric acid in the presence of an organic phase Degree Level Doctoral Remove constraint Degree Level: Doctoral Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • The kinetic and radiolytic aspects of control of the redox speciation of neptunium in solutions of nitric acid

    Creator:
    Precek, Martin
    Abstract:
    Neptunium, with its rich redox chemistry, has a special position in the chemistry of actinides. With a decades-long history of development of aqueous separation methods for used nuclear fuel (UNF), management of neptunium remains an unresolved issue because of its not clearly defined redox speciation. Neptunium is present in two,...
    Resource Type:
    Dissertation
    Full Text:
    Redox Speciation of Neptunium in Solutions of Nitric Acid AN ABSTRACT OF THE DISSERTATION OF

  • Aqueous complexation of citric acid and DTPA with selected trivalent and tetravalent f-elements

    Creator:
    Brown, M. Alex
    Abstract:
    Carboxylic acids have played an important role in the field of actinide (An) and lanthanide (Ln) separations and the reprocessing of irradiated nuclear fuel. Recent bench-scale experiments have demonstrated that 3-carboxy-3-hydroxypentanedioic acid (citric acid) is a promising aqueous complexant that can effectively aid in the separation of transition metals from...
    Resource Type:
    Dissertation
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    An and Ln into the organic phase followed be selective stripping of An(III) into the aqueous

  • The chemistry of acetohydroxamic acid related to nuclear fuel reprocessing

    Creator:
    Matteson, Brent Searle
    Abstract:
    Used Nuclear Fuel (UNF) contains transuranic (TRU) elements and numerous fission products as a result of the uranium fission process and neutron activation that occur in commercial light water power reactors. Recent environmental and nuclear proliferation concerns have spawned the development of advanced reprocessing techniques to close the nuclear fuel...
    Resource Type:
    Dissertation
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    AHA in nitric acid, which is the typical aqueous phase medium for UNF reprocessing. The results of

  • Isotopic exchange reactions in acetic anhydride and anhydrous acetic acid

    Creator:
    Evans, Ersel Arthur
    Resource Type:
    Dissertation
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    such as methane and were carried to an extreme. The interest in a wide variety of non-aqueous

  • Organic Phase Inter-Ligand and Metal-Ligand Speciation in TALSPEAK and ALSEP Solvent Extraction Systems

    Creator:
    Gullekson, Brian J.
    Abstract:
    Partitioning of trivalent actinides (in particular, americium and curium) from the fission produced light lanthanides is a major concern of used nuclear fuel reprocessing for the purposes of waste disposal. Several solvent extraction processes have been developed to address these chemically difficult separations. The historically employed TALSPEAK Process utilizes di-2-ethylhexyl...
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    Dissertation
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    species x in the organic phase, and “cx,aq” is the concentration of species x in the aqueous phase

  • Novel Charge Carriers for Aqueous Electrochemical Energy Storage

    Creator:
    Sandstrom, Sean K.
    Abstract:
    The continued long-term use of fossil fuels as a primary energy source has resulted in dramatic increases in greenhouse gas emissions and the associated concerns of climate change and environmental pollution. A key strategy to circumvent these issues is a global shift away from fossil fuels toward renewable energy sources....
    Resource Type:
    Dissertation
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    ] –). This study demonstrates how the redox of halide anions can be utilized in aqueous batteries and opens

  • Pushing the limits of graphite : the potential beyond conventional applications in aqueous dual-ion batteries

    Creator:
    Kim, Keun-il
    Abstract:
    The increase in the demand for energy is estimated to be 28 TW by a year of 2050, which is twice of the energy produced in 2010, in response to the unprecedented growth of the global population. Current energy market is heavily relying on the fossil fuel, which brings the...
    Resource Type:
    Dissertation
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    different SOC in the 1st cycle at a current rate of 50 mAh g-1, with concentrated nitric acid as a

  • Photochemistry of some bromoarenes

    Creator:
    Jang, Jung-suk
    Abstract:
    The photodebromination of selected bromoarenes has been studied at 300 nm to determine the the possible mechanistic pathways leading to product. Irradiation of 4-bromobiphenyl (BpBr) at this wavelength leads to the product biphenyl. The quantum yield of intersystem crossing (0.98) and quenching studies with cis-1 ,3-pentadiene suggest that the reaction...
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    Dissertation
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    Jang for the degree of Doctor of Philosophy in Chemistry presented on September 21, 1990 Title

  • Transition Metal Oxides for Aqueous Electrochemical Energy Storage

    Creator:
    Jiang, Heng
    Abstract:
    In the 21st century, environmental deterioration is now an indisputable fact. Reliable and economically viable electricity systems based on renewable sources are urgently needed to replace the environmentally detrimental fossil fuels. The feasibility of incorporating renewable-but-intermittent solar and wind energy heavily depends on the development of cost-effective and safe technologies,...
    Resource Type:
    Dissertation
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    carriers in the aqueous system ........................ 26 1.5 Anion-insertion redox chemistry

  • Aqueous niobium chemistry at low pH : new precursors for oxide thin films

    Creator:
    Park, Deok-Hie
    Abstract:
    Phosphate and peroxide stabilize new oxo-hydroxo niobium clusters in water at low pH. The clusters open a new chapter in aqueous niobium chemistry under acidic conditions. The clusters also produce atomically smooth, amorphous niobium oxide phosphate (NbPOx) thin films. Reaction pathways from cluster solutions to amorphous niobium oxide phosphate solids...
    Resource Type:
    Dissertation
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    for the degree of Doctor of Philosophy in Chemistry presented on June 14, 2017. Title: Aqueous