Selective Recovery of Chromium from Precipitates Containing d Elements and Actinides: II. Effect of H2O2 |
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| Authors: | Fedoseev A M Shilov V P Charushnikova I A Yusov A B Budantseva N A Delegard C H |
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| Affiliation: | (1) Russian Academy of Sciences, Institute of Physical Chemistry, Moscow, Russia;(2) Pacific Northwest National Laboratory, Richland, Washington, United States |
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| Abstract: | Oxidation of various Cr(III) hydroxides and mixed Cr(III)-Ni(II) and Cr(III)-Fe(III) hydroxides with hydrogen peroxide was studied. The initial reaction rate increases as the Cr(III) content in the suspension and H2O2 concentration are increased and nonmonotonicaly decreases with increasing NaOH concentration within the 0.2-2.0 M range. The activation energy in 0.5 M NaOH is equal to 82 kJ mol-
1 (30-90°C). The oxidant consumption substantially exceeds the stoichiometry. |
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