Decolourisation, mineralisation and detoxification of mixture of azo dyes using Fenton and Fenton-type advanced oxidation processes

Kumar, John Elisa; Mulai, Tsungom; Kharmawphlang, Wanshanlang; Sharan, R.N.; Sahoo, M.K.

doi:10.1007/s11696-020-01147-9

Cited by 22 publications

(13 citation statements)

References 41 publications

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“…Among the most used AOP are the Fenton and photo-Fenton processes, the photoperoxidation, and the heterogeneous photocatalysis. These processes have been used as an efficient alternative in the treatment of pharmaceutical products (Monteiro et al, 2018), dyes (Kumar et al, 2020), phenolic compounds (Zaidan et al, 2017), among other organic compounds.…”

Section: Introductionmentioning

confidence: 99%

Employment of advanced oxidation processes in the degradation of a textile dye mixture: evaluation of reaction parameters, kinetic study, toxicity and modeling by artificial neural networks

Oliveira

Neves

Santana

et al. 2022

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Organic contaminants in industrial effluents threaten the quality of water resources, especially due to their resistance to natural degradation. The textile industry gain relevance, considering that it generates large volumes. This work aimed to evaluate the efficiency of different advanced oxidation processes (AOP) for the degradation of the mixture textile dyes in solution. After optimization of the main parameters involved in the applied processes and systems, the AOP with greater efficiency in the degradation of the compounds was the photo-Fenton/UV-C (92%) after 360 min of treatment. The experimental data showed a better fit to the Chan and Chu kinetic model and trough an evaluation using artificial neural networks it was possible to predict the maximum degradation achievable by the dye mixture. The toxicity assays, using multiple species of seeds indicated a treated solution with no toxic effects and that the applied methodology can be used without affecting the water resources.

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Section: Introductionmentioning

confidence: 99%

Employment of advanced oxidation processes in the degradation of a textile dye mixture: evaluation of reaction parameters, kinetic study, toxicity and modeling by artificial neural networks

Oliveira

Neves

Santana

et al. 2022

REGET

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“…This means the breakage of small conjugated molecules, i.e., the mineralization of the small organic molecules. [28][29][30][31][32] So, ultrafast azo-dye mineralization was registered in this case although the complete mineralization of azo dye was not confirmed by additional methods. Therefore, the water cleaning ability of studied metallic glass can be significantly improved by appropriate mechanochemical activation.…”

Section: Dye Degradation Performance Of Studied Metallic Glassesmentioning

confidence: 96%

“…Azo dye mineralization reaction pathways are broadly investigated by combining different methods for reaction products identification. [28][29][30][31][32] A general reaction mechanism for mineralization of azo dye by the oxidative action of hydroxyl radicals in the Fenton process were proposed based on the obtained results and the examination of identified intermediates. These studies indicate how the gradual shortening of the molecular conjugate chains affects the UV spectrum.…”

Section: Dye Degradation Performance Of Studied Metallic Glassesmentioning

confidence: 99%

“…The complete degradation of the studied dye at the end of the experiment can be established by following the two peaks at about 275 and 315 nm, which are assigned to the π-system. [4,5,10,11,[28][29][30][31][32] The comparative analysis of the results presented in Figure 1 reveals the waste water treatment efficiency of the studied amorphous materials. Together with the observation of more efficient cleavage of the ─N═N─ bond, lower content of different intermediate organic compounds at the end of catalytic reaction can be clearly seen for the same material.…”

Section: Dye Degradation Performance Of Studied Metallic Glassesmentioning

confidence: 99%

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Application of Mechanochemically Treated Waste Materials for Water Remediation

Cherkezova‐Zheleva

Paneva

Encheva

et al. 2022

Physica Status Solidi (a)

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The possibility to reuse damaged Fe‐based metallic glasses with heterogeneities in their amorphous structure for wastewater remediation is investigated. Fe81B13.5Si3.5C2 ribbons are treated in a planetary ball mill in order to improve their catalytic behavior. Their efficiency in model Fenton reaction of Methyl orange azo‐dye degradation is registered. It reveals significant variations of their performance as a result of material transformation under mechanical treatment. Detailed physicochemical analysis is made to follow material changes after ball milling and catalytic tests. It is obtained that the formation of local atomic Fe‐rich and Fe‐deficit clusters randomly distributed in the amorphous alloy is highly beneficial for increasing catalyst dye degradation ability. Catalytically active centers in studied redox reaction are Fe‐rich clusters due to their strong affinity for donating electrons. Additional important result of this study is that mechanochemical treatment of metallic glasses at appropriate conditions can lead to material homogenization and relaxation of amorphous structure, as it can be observed after temperature annealing. This study demonstrates the possibility to apply mechanochemical method for rearrangement of the amorphous structure of damaged metallic glasses. Such waste materials can be in fact successfully reused as green and sustainable catalysts for effective purification of contaminated industrial waters.

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“…Fenton-like heterogenous catalysts enabling dye degradation in a wide range of pH, among the others zero-valent iron catalysts, green or one-spot synthesis of catalysts, fixed bed reactor application, implementation of sulphate radical anions [92][93][94][95][96] Photo-Fenton…”

Section: Fentonmentioning

confidence: 99%

Recent Achievements in Dyes Removal Focused on Advanced Oxidation Processes Integrated with Biological Methods

2021

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In the last 3 years alone, over 10,000 publications have appeared on the topic of dye removal, including over 300 reviews. Thus, the topic is very relevant, although there are few articles on the practical applications on an industrial scale of the results obtained in research laboratories. Therefore, in this review, we focus on advanced oxidation methods integrated with biological methods, widely recognized as highly efficient treatments for recalcitrant wastewater, that have the best chance of industrial application. It is extremely important to know all the phenomena and mechanisms that occur during the process of removing dyestuffs and the products of their degradation from wastewater to prevent their penetration into drinking water sources. Therefore, particular attention is paid to understanding the mechanisms of both chemical and biological degradation of dyes, and the kinetics of these processes, which are important from a design point of view, as well as the performance and implementation of these operations on a larger scale.

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Decolourisation, mineralisation and detoxification of mixture of azo dyes using Fenton and Fenton-type advanced oxidation processes

Cited by 22 publications

References 41 publications

Employment of advanced oxidation processes in the degradation of a textile dye mixture: evaluation of reaction parameters, kinetic study, toxicity and modeling by artificial neural networks

Employment of advanced oxidation processes in the degradation of a textile dye mixture: evaluation of reaction parameters, kinetic study, toxicity and modeling by artificial neural networks

Application of Mechanochemically Treated Waste Materials for Water Remediation

Recent Achievements in Dyes Removal Focused on Advanced Oxidation Processes Integrated with Biological Methods

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