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  • 1
    Electronic Resource
    Electronic Resource
    Solid phase oxidation of arsenite and the effect of gamma radiation (1990)
    Springer
    Journal of radioanalytical and nuclear chemistry 145 (1990), S. 403-412 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The oxidation of solid arsenite by bromate, chlorate and perchlorate ions has been studied at different temperatures and at a constant composition of 1∶2. Arsenite is completely oxidized to arsenate. The fraction oxidized /α/ — time /t/ data are reproducible. The rate of oxidation increases with an increase in temperature. Gamma radiation has no significant effect on the temperature independence of the oxidation process of this particular composition, although delayed oxidation appears with irradiated systems. The kinetics of oxidation process follows the conventional first order. The activation energies for the oxidation of As/III/ to As/V/ are 30.5, 44.0 and 67.9 kJ mol−1, respectively, for bromate, chlorate and perchlorate systems, and for irradiated 29.8 and 67.3 kJ mol−1, respectively, for bromate and perchlorate systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02163712
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Radiation decomposition of metal acetyl acetonates (1988)
    Springer
    Journal of radioanalytical and nuclear chemistry 128 (1988), S. 283-292 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Studies on the thermal decomposition of the acetyl acetonate complexes of transitional metal ions Cu/II/, Cr/III/, Mn/II/, Co/II/, Fe/III/, Vo/II/, Zn/II/, and Cd/II/ have been performed by thermogravimetric method. Taking the initial decomposition temperature as a measure of thermal stability, the relative order of the thermal stability of these complexes shows the following order: Zn/II/〈Cd/II/〈 VO/II/〈Fe/III/〈Cr/III/〈Cu/II/≅Co/II/〈 Mn/II/. The nature of decomposition of Cu/II/ and Cr/III/ complexes is similar, a sigmoid curve exists. In other cases a long linear decomposition follows the sigmoid pattern. The linear decomposition is a function of final decomposition temperature and percentage of decomposition. The kinetics of the decomposition is analyzed according to the Coats-Redfern equation. The results are discussed on the basis of structural and other aspects leading to the decomposition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02166952
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Solid phase oxidation of iodide ion and the role of gamma radiation (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 152 (1991), S. 261-271 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Solid phase oxidation of iodide ion by bromate, chlorate and perchlorate has been investigated at different temperatures. The bromate-iodide oxidation with equimolecular mixture is independent of temperature. The period of half-oxidation is limited to 5 minutes. Gamma-radiation has no significant effect on the temperature independence of the oxidation process of this particular composition, although delayed oxidation appears with irradiated mixtures. With increase of bromate, the iodide is completely oxidized and the rate is dependent on temperature. However, with chlorate and perchlorate, there is no prescription of composition for oxidation with 1∶1 mixture. The reaction proceeds with an appreciable oxidation. The rate increases with the temperature and goes to completion. In the case of irradiated mixtures delayed oxidation appears. The kinetics of iodide ion oxidation follows conventional first order.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02042160
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    Paper (German National Licenses)
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