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OXIDATION KINETICS OF ORGANIC MOLECULES BY POTASSIUM FERRATE (VI)
Abstract
The decomposition of potassium ferrate (VI) was studied in the pH range of 8.35 to 9.58. The rate expression was found to be mixed-first- and second-order, in which the second-order rate constant was the major component of the rate. The effects of the initial concentration of potassium ferrate (VI), products of the decomposition, impurities of the potassium ferrate (VI) and the buffer system were found to be minor on the second-order rate constant. However, these variables had a major effect on the first-order rate constant. The method of initial rates applied to the decomposition reactions of ferrate (VI) also implied a mixed-first and -second-order rate expression for the initial decomposition of ferrate (VI). The effect of addition of ferrate (IV) on the rate of decomposition of ferrate (VI) was found to be minor. The oxidation kinetics of formic acid, formaldehyde, and methanol by potassium ferrate (VI) in phosphate-borate buffer in the pH range of 8 to 10 was studied. The oxidation rate constants including a 0.6 order dependence on hydrogen ion for those substrates were determined to be as follows: 10('-4) k(,s) (1/M('1.6) sec) HCOO('-) 2.99 HCHO 9.6 CH(,3)OH 0.65
Subject Area
Analytical chemistry
Recommended Citation
TABATABAI, ALI REZA, "OXIDATION KINETICS OF ORGANIC MOLECULES BY POTASSIUM FERRATE (VI)" (1980). ETD collection for University of Nebraska-Lincoln. AAI8018675.
https://digitalcommons.unl.edu/dissertations/AAI8018675