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  • 1
    Electronic Resource
    Electronic Resource
    Sorption of trace quantities of cadmium by soils with different chemical and mineralogical composition (1978)
    Springer
    Water, air & soil pollution 9 (1978), S. 289-299 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Cadmium sorption experiments were performed using four soil separates of different chemical and mineralogical composition, adding Cd solutions with initial concentrations ranging from 15 to 150 μg l−1. At the soils pHs, the sorption isotherms were a mixture of a constant partition isotherm with a high affinity one. Also, more than 90% of the initially added Cd was sorbed by all four soils. These results indicate a high affinity of these soils for trace amounts of Cd. The effect of pH was, in general, to decrease the amount of sorbed Cd as the pH decreased. The sorption isotherms were linear at all pH's. Also, the data fitted the Freundlich's sorption isotherm in all cases, but not Langmuir's. Freundlich's k values were found to be a good index of the relative Cd sorption affinities of the four soils at all the pH's used. It was found that the structural and chemical nature of the soils sorbent complex was a more important parameter than the CEC when studying the sorption of these trace amounts of Cd by soils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00280677
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The practice of leaching boron and soluble salts from fly ash-amended soils (1979)
    Springer
    Water, air & soil pollution 12 (1979), S. 247-254 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The leachability of B and salts from two fly ash-amended soils was conducted in a column leaching experiment. Fly ash was applied to the surface 3 cm of a Baywood (acid) sand and an Arizo (calcareous) sandy, loam at 5% by weight; the columns were continously leached with Colorado River water at two different pH's. Boron from fly ash was solubilized more readily in the Baywood than in the Arizo soil. Addition of fly ash increased B levels in the leachates from 0.25 to 2.35 μg ml−1 (Baywood) and 0.93 μg ml−1 (Arizo). Acidified leaching water had no significant effect on B leaching patterns but resulted in leaching higher soluble salts. Approximately 348 and 161 cm of water for the Arizo and the Baywood soils respectively, would be required to reduce the B concentration below a critical limit for B sensitive crops. It is suggested that crops planted when fly ash is applied for disposal/recycling on land should be both salt and B tolerant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01047127
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Spectrographic determination of metallic impurities in PuO2 (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 287 (1977), S. 304-309 
    Details
    ISSN: 1618-2650
    Keywords: Analyse von Plutoniumdioxid ; Spektralanalyse, Trägerdestillation ; 22 Verbindungen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary An emission spectrographic method has been developed for the estimation of 22 metallic impurities in plutonium dioxide using carrier-distillation technique Silver chloride at 5% concentration in a charge of 100 mg has been used as the carrier. Mixed oxide standards containing 10% PuO2 have been used for the analysis of matching composition of plutonium samples. Precision and accuracy determinations of the synthetic samples indicate 7–16% deviation for most of the elements. The work described includes analysis of reference samples and matrix effect studies. The method is suitable for the chemical quality control analysis of plutonium oxide to be used for Fast Breeder Test Reactor (FBTR) fuel.
    Notes: Zusammenfassung Mit dem Verfahren der Trägerdestillation können 22 Elemente in Plutoniumdioxid spektralanalytisch erfaßt werden. Als Träger dient 5% Silberchlorid in je 100 mg. Mischoxid-Standards mit 10% PuO2 wurden verwendet. Bei der Untersuchung von Genauigkeit und Reproduzierbarkeit synthetischer Proben wurden für die meisten Elemente Abweichungen von 7–16% festgestellt. Matrixeinflüsse wurden ebenfalls untersucht sowie Analysenergebnisse für bestimmte Bezugsstandards mitgeteilt. Das Verfahren eignet sich für die Qualitätskontrolle von PuO2-Brennstoffen für schnelle Brutreaktoren.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00634504
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Direct AAS determination of Co, Cr, Cu, Mn and Ni in U3O8 by electrothermal atomization (1979)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 296 (1979), S. 40-44 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Kobalt, Chrom, Kupfer, Mangan, Nickel in Uranoxid ; Spektralphotometrie, Atomabsorption, flammenlos ; Graphitstab
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary An atomic absorption spectrometric method has been developed for the determination of chromium, cobalt, copper, manganese and nickel in U3O8 by electrothermal atomization of 5 mg powder samples. Nanogram amounts of all the elements can be estimated with a precision ranging between 7–12%. The non-specific absorption due to U3O8 for these measurements is negligible. The use of graphite powder with U3O8 in equal or double the sample amount improves sensitivity for the analyte element and prolongs the life of the atomizer.
    Notes: Zusammenfassung Das entwickelte AAS-Verfahren geht von pulverförmigen 5mg-Proben aus. Nanogramm-Mengen der genannten Elemente können mit einer Genauigkeit im Bereich von 7–12% bestimmt werden. Die durch U3O8 verursachte unspezifische Absorption ist zu vernachlässigen. Durch Graphitzusatz (in der gleichen oder doppelten Menge der Probe) wird die Empfindlichkeit der Bestimmung verbessert und die Lebensdauer des Atomizers verlängert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00481169
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Spectographic determination of trace metallic elements in uranium using a mixed carrier: Ga2O3 and SrF2 (1979)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 297 (1979), S. 388-392 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Verunreinigungen in Uran ; Spektrographie, Emission ; Ga2O3/SrF2-Träger
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Detailed investigations have been carried out to find a suitable alternative to the AgCl carrier for the estimation of a wide range of trace metallic elements including silver in uranium. These studies also include determination of arc-plasma parameters for different carriers. Based on the results of these studies, a 6 % mixture of Ga2O3 and SrF2 in 2∶1 proportion has been found to be the best carrier. A “carrier distillation” emission spectrographic method has been standardised for estimation of twenty-three elements in uranium with 50 mg charge on the electrode using this carrier. The precision of the method is 18% or better for most of the elements.
    Notes: Zusammenfassung Für die spektrographische Bestimmung von metallischen Verunreinigungen einschließlich Silber in Uran wurde ein Ersatz für den AgCl-Träger gesucht. Bei diesen Untersuchungen wurden auch die Bogenplasmaparameter für verschiedene Träger bestimmt. Als optimal ergab sich eine Mischung mit 6% Ga2O3 und SrF2 im Verhältnis 2∶1. Eine Trägerdestillationsmethode für die Bestimmung von 23 Elementen in einer 50 mg-Probe wurde entsprechend standardisiert. Die Genauigkeit ist in den meisten Fällen besser als 18%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00480895
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    Paper (German National Licenses)
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