Reaction kinetics of sonochemical oxidation of potassium hexacyanoferrate(II) in aqueous solutions

Rajchel-Mieldzioć, Paulina; Tymkiewicz, R.; Sołek, Jan; Secomski, Wojciech; Litniewski, Jerzy; Fita, Piotr

doi:10.1016/j.ultsonch.2019.104912

Cited by 3 publications

(2 citation statements)

References 49 publications

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“…When the two complexes react, [Fe(CN)6] 3− is produced. The absorption maxima (λmax) for [Fe(CN)6] 3− was 420 nm [21,22]. As Fe(II) was oxidized to Fe(III) by Co(III) ion, the absorbance increased with time as the concentration of Fe(III) increased, as shown in Figure 2.…”

Section: Kinetic Studiesmentioning

confidence: 94%

Effect of Reverse Micelles Size on the Electron Transfer Reaction within the Ion Pair of Co (III)/Fe (II) Complexes

2022

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The electron transfer process between pentammineaquacobalt (III) and hexacyanoferrate (II), [Co(NH3)5H2O]3+/Fe(CN)6]4− ion pair was investigated in water/dioctyl sodium sulfosuccinate (AOT)/Isooctane reverse micelles. The study observed that the electron transfer rate depends on the size of the reverse micelles. The concentrations of Fe (II) ions were varied in different-sized (Wo) reverse micelles of Wo = [H2O]/[AOT] = 10 to 30, but the concentration of Co (III) ions was kept constant. The rate of electron transfer in the ion pair [Co(NH3)5H2O]3+/[Fe(CN)6]4− increased with decreasing size (Wo) of reverse micelles. The smallest reverse micelles Wo = 10 demonstrated the fastest electron transfer rate, and the biggest Wo = 30 reverse micelles showed the slowest electron transfer rate. The change of reaction environment and the location of the reactants in the reverse micelles due to confinement are considered the factors responsible for the results.

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Section: Kinetic Studiesmentioning

confidence: 94%

Effect of Reverse Micelles Size on the Electron Transfer Reaction within the Ion Pair of Co (III)/Fe (II) Complexes

2022

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“…In Equation 2, k 1 is the pseudo-first-order rate constant. Pseudo steady-state approximation, in which the concentration of hydroxyl radicals (OH•) does not change with the reaction time, is commonly used (Kumoro et al, 2017;Rajchel-Mieldzioć et al, 2020;Fard et al, 2016;El-Dein et al, 2003). This approach has been widely used to eliminate the nonmeasurable radicals concentration, correlating it as a function of H 2 O 2 concentration (Neamtu et al, 2002;El-Dein et al, 2003).…”

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confidence: 99%

Experimental and Theoretical Aspects of Azo Dye Degradation by UV/H2O2 Process: Review and experimental comparison of some kinetic rate expressions

Savun-Hekimoğlu¹

2020

International Journal of Environment and Geoinformatics

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Due to their unique properties, azo dyes are extensively used, especially in the textile industry. Due to their low biodegradability, these compounds cannot be treated in wastewater treatment plants and discharges of these effluents poses a serious threat to the receiving water bodies. In the literature, several advanced oxidation processes have been studied for decolorization and mineralization of these toxic compounds. Among these advanced oxidation processes, the UV/H 2 O 2 process has attracted great attention with its high efficiency in removing these compounds. The goal of this paper is to review the kinetic rate expressions developed to describe azo dye degradation by UV/H 2 O 2 process. A detailed review of pseudo-first-order reaction mechanism, as well as reactor design models, is provided. Finally, a set of experiments are conducted with Reactive Black 5 to compare the model estimations with the observed data. In addition, a regression model is developed using response surface methodology to optimize operating conditions. The experimental results indicate that the optimum pH value that gives the maximum reaction constant is 5.74. Moreover, initial dye concentration is found to be a more significant parameter for decay rate constant than pH value. The open questions and future research topics are also discussed.

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Porphyrazine/phthalocyanine hybrid complexes – Antibacterial and anticancer photodynamic and sonodynamic activity

Wysocki,

Ziental,

Jozkowiak

et al. 2023

Synthetic Metals

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Reaction kinetics of sonochemical oxidation of potassium hexacyanoferrate(II) in aqueous solutions

Cited by 3 publications

References 49 publications

Effect of Reverse Micelles Size on the Electron Transfer Reaction within the Ion Pair of Co (III)/Fe (II) Complexes

Effect of Reverse Micelles Size on the Electron Transfer Reaction within the Ion Pair of Co (III)/Fe (II) Complexes

Experimental and Theoretical Aspects of Azo Dye Degradation by UV/H2O2 Process: Review and experimental comparison of some kinetic rate expressions

Porphyrazine/phthalocyanine hybrid complexes – Antibacterial and anticancer photodynamic and sonodynamic activity

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