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The redox chemistry of neptunium in γ-irradiated aqueous nitric acid in the presence of an organic phase

Creator:: Mincher, Bruce J., Precek, Martin, and Paulenova, Alena
Abstract:: The radiolytic changes in oxidation state for solutions of initially Np(V) and/or Np(VI) were investigated by gamma-irradiation in conjunction with UV/Vis spectroscopy of the aqueous phase. Samples were irradiated in varying concentrations of nitric acid, and with or without the presence of 30 % TBP in dodecane. At short irradiation...
Resource Type:: Article
Full Text:: neptunium in γ-irradiated aqueous nitric acid in the presence of an organic phase The redox chemistry of

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

Synthesis and testing of a novel soft donor organic extractant molecule for targeted soft metal extraction from aqueous phases

Creator:: Gullekson, Brian J.
Abstract:: Spent nuclear fuel (SNF) resultant from the generation of nuclear power is a chemically and radiologically diverse system which is advantageous to chemically process prior to geologic disposal. Hydrometallurgy is the primary technology for chemical processing for light water reactor spent fuels, where spent fuel is dissolved in an acid...
Resource Type:: Masters Thesis
Full Text:: S6 solution in n-dodecane. Aqueous solutions of nitric acid and n-dodecane as an organic diluent

Geochemistry of thorium in natural water systems

Creator:: Chun, Yip
Resource Type:: Masters Thesis
Full Text:: -exchange resin and nitric acid solutions. The ordinates are logarithms of the distribution coefficient in

Aqueous Complexation of Thorium(IV), Uranium(IV), Neptunium(IV), Plutonium(III/IV), and Cerium(III/IV) with DTPA

Creator:: Brown, M. Alex, Paulenova, Alena, and Gelis, Artem V.
Abstract:: Aqueous complexation of Th(IV), U(IV), Np(IV), Pu(III/IV), and Ce(III/IV) with DTPA was studied by potentiometry, absorption spectrophotometry, and cyclic voltammetry at 1 M ionic strength and 25 °C. The stability constants for the 1:1 complex of each trivalent and tetravalent metal were calculated. From the potentiometric data, we report stability...
Resource Type:: Article
Full Text:: The major extinction coefficient of Pu(IV) in nitric acid (474 nm) is significantly larger26 than that

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
Full Text:: 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
Full Text:: AHA in nitric acid, which is the typical aqueous phase medium for UNF reprocessing. The results of

Refractory metals processing waste utilization on Dayton silty clay loam soil

Creator:: Polson, Richard Lewis
Abstract:: Waste products from industry have often been disposed in landfills without regard for any beneficial uses of the product in agricultural production. This research was conducted to determine the effect of a refractory metal processing waste product on (a) soil chemical and physical properties, (b) perennial ryegrass forage quality and...
Resource Type:: Masters Thesis
Full Text:: percent of the zinc in the soil solution was associated with soluble organic ligands in four loam soils

Development and application of an analytical technique for the determination of methylmercury compounds in environmental samples based on isolation by distillation, followed by purge-and-trap sample concentration and GC/MS separation and detection, after aqueous phase ethylation with sodium tetraethylborate

Creator:: Rice, William R.
Abstract:: An analytical technique has been developed for the determination of methylmercury compounds in environmental samples. The technique is based on a two-stage procedure. In the first stage, methylmercury compounds are isolated from the sample matrix as methylmercury chloride (MeRgCl) by distillation. The distillation procedure is based on a series of...
Resource Type:: Masters Thesis
Full Text:: Master of Science in Chemistry presented on Stmtember 8. 2000. Title: Development and Application of an

Isotopic exchange reactions in acetic anhydride and anhydrous acetic acid

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

ScholarsArchive@OSU

The redox chemistry of neptunium in γ-irradiated aqueous nitric acid in the presence of an organic phase

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

Synthesis and testing of a novel soft donor organic extractant molecule for targeted soft metal extraction from aqueous phases

Geochemistry of thorium in natural water systems

Aqueous Complexation of Thorium(IV), Uranium(IV), Neptunium(IV), Plutonium(III/IV), and Cerium(III/IV) with DTPA

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

The chemistry of acetohydroxamic acid related to nuclear fuel reprocessing

Refractory metals processing waste utilization on Dayton silty clay loam soil

Isotopic exchange reactions in acetic anhydride and anhydrous acetic acid

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