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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 Academic Affiliation Chemical, Biological and Environmental Engineering Remove constraint Academic Affiliation: Chemical, Biological and Environmental Engineering Degree Level Doctoral Remove constraint Degree Level: Doctoral

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  • The mobilization of heavy metals from contaminated soil using low molecular weight organic acids

    Creator:
    Kang, Sun Ki
    Abstract:
    More than 30,000 potential Superfund sites have been identified. Heavy metals are contaminants at many of these Superfund sites. The average cost of cleanup a single-typical Superfund site currently stands at $20 million, and it is expected that the cost may escalate to $50 million within the next decade. Problems...
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    Dissertation
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    effect, no immobile aqueous-phase zone, and linear desorption kinetics. An analytical solution of the

  • Metal Oxide Cluster Chemistries for Next Generation Nanomanufacturing

    Creator:
    Frederick, Ryan T.
    Abstract:
    Metal oxide clusters are promising inorganic photoresists in next generation nanomanufacturing because of their potential for high-resolution and low line-edge roughness patterning, and exceptional sensitivity to extreme ultraviolet (EUV) radiation. In EUV patterning, absorption of EUV radiation leads to electron emission that serve as a primary species for driving radiation...
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    resulting film chemistry. In the case of HafSOx, advanced studies of the changing precursor chemistry

  • Applications of Nonthermal Microplasmas in Chemical Reaction Engineering

    Creator:
    Kreider, Peter B.
    Abstract:
    Nonthermal plasmas generate high concentrations of excited species that can simultaneously exist at high energy and far from thermodynamic equilibrium, making them useful tools in chemistry and engineering. Microplasmas, roughly defined as plasmas that are generated within sub-millimeter dimensions, provide enhanced stability, improved excited species density, increased nonequilibrium properties, higher...
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    Dissertation
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    in organic fuel-like media by dissolved atmospheric oxygen and the partial 3 oxidation of

  • Physiochemical mechanisms for the transport and retention of technetium

    Creator:
    Jansik, Danielle P.
    Abstract:
    Understanding the transport and retention of radionuclides in the environment is important for protecting freshwater supplies and minimizing impact to biologic systems. Technetium-99 (Tc⁹⁹) is a radionuclide of interest due to its long half-life (2.13 x 10⁵ years) and toxicity. In the form of pertechnetate (TcO₄⁻), Tc is expected to...
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    ................................................................................................. 17 Chapter 3: Influence of Discharged Waste Chemistry on the Geochemical Retention of Tc in Vadose

  • Fundamental Investigations of Electrocatalysis: Mechanistic Implications of Catalyst Electronic Structure

    Creator:
    Carvalho, O. Quinn
    Abstract:
    Heterogeneous catalysis modulates the rate and selectivity of reaction processes by stabilizing a series of intermediate states on solid surfaces, facilitating the production of many commodity chemicals modern society relies upon. Conventional, thermal catalytic processes—conducted at elevated temperatures and pressures—source thermal, mechanical, and chemical potential energy from carbon-hydrogen bonds— combustion...
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    performance. In chapter 2, we investigate the presence of oxygen evolution reaction (oxidizing water to form

  • Examining the Environmental Behavior and Treatment Efficacy of Titanium Dioxide Nanomaterials in Complex Systems

    Creator:
    Deline, Alyssa R.
    Abstract:
    Metal oxide nanoparticles (MONPs) are manufactured at the greatest rate of any class of nanomaterial due to their wide variety of industrial, commercial, and environmental applications. The sustainable use of MONPs requires a balance of careful consideration of their potential negative environmental impacts with the effective exploitation of their unique...
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    mechanistic conclusions drawn in experiments are not affected by the presence of the label. Guidance is

  • Binding of bacterial lipopolysaccharide by the cationic amphiphilic peptide WLBU2 at interfaces

    Creator:
    Ryder, Matthew P.
    Abstract:
    Passage of blood through a sorbent device for removal of bacteria and endotoxin by specific binding with immobilized, membrane-active, bactericidal peptides holds promise for treating severe blood infections. Peptide insertion in the target membrane and stable binding is desirable, while membrane disruption and release of degradation products to the circulating...
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    showed in fact that LPS vesicles appear to undergo peptide-induced destabilization in the presence of

  • Degradation of graphite electrodes in acidic bromine electrolytes

    Creator:
    Bistrika, Alexander A.
    Abstract:
    As the world's power needs grow, the demand for power from renewable resources, such as wind or solar is increasing. One major drawback associated with these renewable resources is that the power output is dependent on environmental factors, such as cloud cover and wind speeds. This allows the possibility of...
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    nominal rate (○). The solid line represents the expected degradation in performance of an untreated

  • Transcriptional and physiological response of Nitrosomonas europaea to inhibition by chlorinated aromatics and heavy metals

    Creator:
    Sandborgh, Sean C.
    Abstract:
    This research investigates the physiological and transcriptional responses of Nitrosomonas europaea when exposed to chlorinated aromatic compounds and heavy metals under varying environmental conditions. It was found that transcriptional responses of identified sentinel genes correlate well with nitrification inhibition. Sorption of metals to biomass was also investigated and found not...
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    ), surface chemistry (Gao et al. 2008; Song et al. 2009), and the presence of organic ligands (Hajdu et al

  • Novel Approaches to Evaluate the Environmental Impacts of Nanomaterials

    Creator:
    Wu, Fan
    Abstract:
    Numerous studies have shown that some nanomaterials are highly toxic to aquatic organisms and can potentially disrupt overall community health; however, current methods to evaluate the nanomaterials environmental impacts rarely consider the environmental realism or provide sufficient detail on the impact at the community level. Here we demonstrate three approaches...
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    Dissertation
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    concentrations in the presence of oprganisms for each type of AgNP in NCM at each exposure concentration