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- W2059525091 abstract "The polarographic behaviour of U(VI) has been studied in sulphuric acid solutions of different concentrations and the different kinetic parameters are determined. The nature of the polarograms differs in accordance with the acid concentration. The diffusion coefficient of U(VI) is found to be 3·51 × 10−6, 6·02 × 10−6 and 6·52 × 10−6 cm2/s for 5·0, 1·0 and 0·1 M H2SO4 respectively. The waves being irreversible are analysed by the Koutecky—Delahay treatments and also by a proposed simpler procedure; the latter proved to be more easy and rapid. The values of the different kinetic parameters reveals that the irreversibility of the electrode reaction decreases with rise of sulphuric acid concentration. Etude du comportement polarographique de U(VI) dans des solutions d'acide sulfurique à différentes concentrations et détermination des différents paramètres cinétiques. La nature des polarogrammes diffère selon la concentration de l'acide. Le coefficient de diffusion de U(VI) est trouvé être respectivement 3,5 × 10−6; 6,02 × 10−6 et 6,52 × 10−6 cm2/s pour H2SO4 5,0; 1,0 et 0,1 M, Les vagues étant irréversibles, sont analysées les traitements de Koutecky—Delahay et aussi par un moyen proposé plus simple, ce dernier s'avérant le plus facile et le plus rapide, Les valeurs des différents paramètres cinétiques montrent que l'irréversibilité de la réaction d'élëctrode décroît quand la concentration en acide sulfurique augmente. Man untersuchte das polagraphische Verhalten von U(VI) in schwefelsauren Lösungen und bestimmte die verschiedenen kinetischen Paraeter. Die Art der Polarogramme variiert entsorechend der Säurekonzentration. Für den Diffusions- koeffizienten von U(VI) fand 3,51 × 10−6, 6,02 × 10−6 und 6,52 × 10−6 cm2/s bei Schwefel- säurekonzentrationen von 5,0 1,0 und 0,1 M. Die irreversiblen Wellen wurden nach der Methode von Koutecky—Delahay, sowie nach einem ähnlichen Verfahren untersucht, wobei sich die zweite Methode als einfacher und rascher herausst- ellte. Die Werte der verschiedenen kinetischen Parameter zeigen, dass der Grad der Irreversibilität mit steigender Säurekonzentration abnimmt." @default.
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- W2059525091 date "1972-02-01" @default.
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- W2059525091 title "Kinetics of reduction of hexavalent uranium in sulphuric acid solutions. A simplified method for determining the parameters of irreversible waves" @default.
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- W2059525091 doi "https://doi.org/10.1016/0013-4686(72)85037-0" @default.
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