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2 edition of kinetics of the ambient temperature dissolution of plutonium metal in sulfamic acid found in the catalog.

kinetics of the ambient temperature dissolution of plutonium metal in sulfamic acid

L. W Gray

kinetics of the ambient temperature dissolution of plutonium metal in sulfamic acid

by L. W Gray

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  • 31 Currently reading

Published by Dept. of Energy, for sale by the National Technical Information Service in [Washington], Springfield, Va .
Written in English

    Subjects:
  • Plutonium

  • Edition Notes

    Statementby L. W. Gray
    SeriesDP ; 1484
    ContributionsUnited States. Dept. of Energy
    The Physical Object
    Pagination15 p. :
    Number of Pages15
    ID Numbers
    Open LibraryOL14878706M

    The dissolution of aluminum, calcium, and iron from calcined fly ash with hydrochloric acid was investigated using a batch reactor at temperatures from to K and over the acid concentration range of – M. Calcium was preferentially released compared to aluminum though these two elements in the calcined fly ash were mainly incorporated into the same mineralogical phase of by: The dissolution rate of gibbsite as a function of temperature, acid/base, ionic strength, degree of saturation and catalysis by inorganic anions has been addressed in previous works. Bloom studied the kinetics of dissolution of two synthetic gibbsite samples in nitric acid solutions with pH values that ranged from to

    terial combines good mechanical properties of metals and bioactive properties of hydroxyapatite. Its applica-tions are in surgery and dentistry, when some load-bear-ing bone has to be replaced by implant [3–5]. This paper deals with dissolution kinetics of HAp and . kinetic studies of mineral dissolution and precipitation. Dissolution rates of aluminum oxide and hydroxide as a function of temperature, acidity, ionic strength, and degree of saturation have been addressed in previous work (see for example White and Brantley, ) and will not be reviewed here. Major aims of previous gibbsite studies were to Author: P. Benezeth, D.A. Palmer, D. Wesolowski.

    @article{osti_, title = {Oxidation kinetics of plutonium in air: Consequences for environmental dispersal}, author = {Haschke, J M and Allen, T H and Martz, J C}, abstractNote = {Kinetic studies show that plutonium corrosion in air is catalyzed by plutonium hydride on the metal surface and suggest that the process has caused storage containers to fail. The kinetics of sodium chloride dissolution under the conditions of gravity deposition in condensates of soda production gas cooling apparatus containing ammonia and ammonium carbonates was studied. The method for calculating the dissolution rate is proposed based on measuring the deposition time of dissolving salt crystals at two : Michael Tseitlin, Valentina Raiko, Aleksei Shestopalov.


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Kinetics of the ambient temperature dissolution of plutonium metal in sulfamic acid by L. W Gray Download PDF EPUB FB2

Get this from a library. The kinetics of the ambient temperature dissolution of plutonium metal in sulfamic acid. [L W Gray; United States. Department of Energy.]. The dissolution kinetics and apparent solubility of natural apatite in closed reactors at temperatures from 5 to 50 °C and pH from 1 to 6 Author links open overlay panel Najatte Harouiya a 1 Claire Chaïrat a b Stephan J.

Köhler a 2 Robert Gout a Eric H. Oelkers aCited by:   Dissolution rate under diffusion conditions is usually controlled by three parameters, D, δ, and cm. Since the dependence of D and δ values on the individual properties of metals (D ≈ 10−5 cm2/sec, δ≈ 10−3 cm) is slight,dissolution rate under diffusion conditions is determined chiefly by cm, which thus constitutes the principal criterion governing the choice of a metal compatible Cited by: 2.

It can be used to describe the surface-controlled dissolution kinetics of divalent metal carbonates and allows determination of the order of dissolution reactions with respect to rate-controlling protonated carbonate surface groups in acid solutions (>CO 3 H 0) and hydrated metal groups (>MeOH 2 +) in neutral to alkaline by: The dissolution rate of plutonium oxide powder in nitric/hydrofluoric acid mixtures is controlled by a chemical reaction at the PuO 2 surface rather than by diffusion.

The reaction is first order with respect to both the surface area (S) of PuO 2 and the concentration of free (non-complexed) hydrofluoric acid ([HF] ƒ) in the dissolution progresses, the surface area decreases and Cited by:   AbstractA theory of precipitate dissolution has recently been proposed by Aaron (Metal Sci.

J.,2, ) in which it is implied that a previous treatment by Cited by: An experiment analyzing the kinetics of dissolution of a solid with cylindrical geometry in water is presented.

The dissolution process is followed by measuring the solid mass and its size parameters (thickness and diameter) as a function of time. It is verified that the dissolution rate follows the Nernst model.

Data treatment is compared with the dissolution of a spherical solid previously. Journal of AUoys and Compounds, () JALCOM The mediated electrochemical dissolution of plutonium oxide: kinetics and mechanism* Yury Zundelevich Chemistry and Materials Science, L, Lawrence Livermore National Laboratory, Livermore, CA (USA) (Received Aug ; in final form October 1, ) Abstract The design and optimization of large-scale systems for electrochemical dissolution Cited by:   This economical and safe kinetics experiment involves the rate of dissolution of a spherical candy in water.

The 2/3 order with respect to the measured mass gives students a practical example of a non-integer order usually only encountered in textbooks in free radical processes. Insight is given to the fact that in a dissolving solid sphere, the radius recedes at constant by: 5.

Exercise 4 KINETICS OF DISSOLUTION OF SOLID SUBSTANCES Theory Dissolution of a solid substance is one of the heterogeneous processes occurring on the boundary between two phases, which is called the phase interface. Obviously one of the phases is solid, so it is the reaction on the solid surface and it can be divided into following steps:File Size: KB.

As described in a recent report, the oxidation kinetics of plutonium in air at temperatures below °C are strongly dependent on humidity and alloying, as well as on temperature. The corrosion rate is reduced by decreasing the water concentration or by alloying with by: Effective dissolution of plutonium dioxide has traditionally been accomplished by contact with strong nitric acid containing a small amount of fluoride at temperatures of {approximately} C.

In spite of these aggressive conditions, PuO{sub 2} dissolution is sometimes incomplete requiring additional contact with the solvent.

This work focused on an alternative to conventional dissolution in Cited by: 3. The aim of these dissolution experiments was to understand how the morphologies of our powders impact dissolution kinetics. The different dissolution kinetics rates were recorded by ICP-AES for ceria compounds and by alpha counting for the plutonium dioxide dissolution.

Result and discussion on CeO 2 samples Cited by: 2. Abstract. The dissolution kinetics of vanadium trioxide in sulphuric acid-oxygen medium was examined. It was determined that the concentration of sulphuric acid and stirring speed above rmin −1 did not significantly affect vanadium extraction.

The dissolution rate increased with increasing temperature and oxygen partial pressure, but decreased with increasing particle by: 7. Dissolution kinetics of zirconium dioxide (ZrO2) in nitric acid was investigated as a function of time, temperature, acid concentration, stirring speed, solid to liquid ratio, and surface area.

with the solvent, independent of temperature or the thermal history of the glass. The morphology of the dissolving surface is described and the possibility of using surface etching to image dynamic heterogeneities is explored.

Introduction. The dissolution kinetics of amorphous materials is fundamental to a number of important processes. Mechanism and Kinetics for the Dissolution of Apatitic Materials in Acid Solutions.

C.E. Calmanovici 1, B. Gilot 2 and C. Laguérie 2 1 RHODIA S.A. Research Center of Paulínia -Paulínia, Brazil. 2 Laboratoire de Génie Chimique, URA CNRS - ENSIGC, Toulouse, France.

(Received: Aug ; Accepted: February 3, ). SEM image of zeolite particles, zeolite dissolution rate-pH dependence and zeolite dissolution rate law.

) fluorite. With the aim to advance in the current knowledge of mineral dissolution kinetics we decided to investigate the dissolution mechanisms that drive fluorite dissolution at low temperature. Plutonium metal can be readily dissolved in aqueous solutions of sulfamic acid. When the plutonium sulfamate--sulfamic acid solutions are added to normal purex process streams, the sulfamate ion is oxidized by addition of sodium nitrite.

This generates sodium sulfate which must be stored as. Tracings of copper surface after dissolution in N aqueous ammonia beyond the laminar regime 59 8.

Trial runs for dissolution of 2-in. diameter copper disc in 2 1. of air-saturated solution of N aqueous ammonia. Disc cleaned with 5 N HgSOj. Solution temperature = 24°C; oxygen in solution =.

Reactions of Sodium Peroxide with Components of Legacy Plutonium Materials readily dissolves in ambient-temperature nitric acid without the use of potassium fluoride. of M.Increasing the temperature increases the rate of thermal decomposition of sulfurous acid and consequently, the rate of sulfuric acid formation, increasing the rate of ZnS kinetics.The stoichiometry and the kinetics of the ambient temperature dissolution of alpha-phase plutonium in sulfamic acid has been determined.