Towards industrial implementation of Electro-Fenton and derived technologies for wastewater treatment: A review

Casado, Juan

doi:10.1016/j.jece.2018.102823

Cited by 153 publications

(61 citation statements)

References 177 publications

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“…It can be seen from It can be seen from Figure 3c that when pH = 4 and 5, the amount of Fe 2+ produced decreased to 6.71 and 5.13 mM after 80 min, respectively. As shown in Figure 3d, increasing the pH inhibited the production of H2O2, When the pH> 3, the active point for producing hydrogen peroxide decreased [6], with a side reaction occurring in the system…”

Section: Effect Of the Initial Phmentioning

confidence: 88%

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Process optimization and mechanism study of acid red G degradation by electro-Fenton- Feox process as an in situ generation of H2O2

Sun¹,

Yao²,

Wei³

et al. 2021

Turk J Chem

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Dye contaminated wastewaters are industrial wastewaters that are difficult to be treated using traditional biochemical and physicochemical methods. In the present work, the acid red G was removed as a model pollutant by the Electro-Fenton Process for the first time. The anode and cathode used by the Electro-Fenton Process were iron plate and graphite felt, respectively. Optimizing the process, it was concluded that under the conditions of current density= 20 mA cm-2 , pH= 3 and initial Na2SO4 concentration= 0.2 M, the removal rate of acid red G with an initial concentration of 300 mg L-1 could reach 94.05% after 80 min of electrolysis. This reveals that the EF-Feox Process used in this work has an excellent removal efficiency on acid red G. The required reagents (Fe 2+ , H2O2) were generated by the electrode reaction, while the optimal generation conditions and mechanism of •OH, H2O2 and Fe 2+ were investigated. By testing •OH, H2O2, and Fe 2+ agents at different pH and current densities, it was revealed that the Electro-Fenton reaction was most efficient when the current density was 20 mA cm-2, and the pH was 3. Moreover, the removal rate of ARG is consistent with first-order reaction kinetics.

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Section: Effect Of the Initial Phmentioning

confidence: 88%

“…Electrochemical treatment is one of the most exciting and efficient methods to treat the organic pollutants mentioned above [6]. In particular, advanced electrochemical oxidation processes (EAOP) have been extensively studied to achieve promising results for the efficient removal of organic dyes.…”

Section: Introductionmentioning

confidence: 99%

Process optimization and mechanism study of acid red G degradation by electro-Fenton- Feox process as an in situ generation of H2O2

Sun¹,

Yao²,

Wei³

et al. 2021

Turk J Chem

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“…Na literatura, vários métodos como eletrólise, precipitação, coagulação com sais metálicos, troca iônica, etc., são aplicadas para remoção de contaminantes de efluentes líquidos. 19 Entretanto, muitos destes métodos geram novos problemas ou grande quantidade de resíduos, sendo assim, agressivo ao meio ambiente. 20 A vantagem da utilização de tanino em substituição a outros tipos de coagulantes, é devido à biodegradabilidade do lodo gerado e, além disso, pode ser reaproveitado na agricultura.…”

Section: Otimização Do Processo Para O Tratamento De Efluentesunclassified

Utilization of the Pinus Bark for Tannin Extraction to apply with as Coagulant in the Treatment of Industrial Effluents

João

Júnior²

2019

Rev. Virtual Quim

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Studies have shown that plant residues can be used for tannin extraction and applied as coagulants in the treatment of liquid effluents. In view of this scenario, the objective of this work was to use the bark of Pinus to make the extraction of tannins and to apply as coagulant in the treatment of industrial effluent. Initially the extraction of tannins from the Pinus bark was done using different solvents, such as 5 % sodium bisulfite, ethanol and water. The obtained tannins were used as coagulants in the treatment of effluents generated in a domestic sanitizing industry. The results showed that the removal of the contaminants increases as the tannin concentration increases in the medium, and the best results were observed between 3000 and 3500 mg L -1 . At the concentration of 3500 mg L-1 of tannins, mean values for detergent removal were 98 %, color 96.4 %, turbidity 92.2 %, COD 85.1 % and BOD 91 %. However, at lower concentrations the removal values were lower. With these results, it was possible to lay out a proposal for an effluent treatment plant, which has the capacity to condition the effluent so that it can be reused in the company for non-potable purposes. ResumoEstudos vêm demonstrando que os resíduos vegetais podem ser utilizados para extração de tanino e ser aplicado como coagulantes no tratamento de efluentes líquidos. Diante desse cenário, o objetivo deste trabalho foi utilizar a casca de Pinus para fazer a extração de taninos e aplicar como coagulante no tratamento de efluente industriais. Inicialmente foi feito a extração de taninos da casca de Pinus utilizando diferentes solventes, como bissulfito de sódio 5 %, etanol e água. Os taninos obtidos foram utilizados como coagulantes no tratamento de efluentes gerados em uma indústria de saneantes domissanitários. Os resultados obtidos mostraram que a remoção dos contaminantes aumenta à medida que se aumenta a concentração de tanino no meio, sendo que os melhores resultados foram observados entre 3000 a 3500 mg L -1 . Com a concentração de 3500 mg L -1 de taninos, os valores médios para remoção de detergente foi 98 %, cor 96,4 %, turbidez 92,2 %, DQO 85,1 % e DBO 91 %. Entretanto, para concentrações menores os valores de remoção foram inferiores. Com estes resultados, foi possível esquematizar uma proposta de estação de tratamento de efluentes, que apresenta a capacidade de condicionar o efluente para que possa ser reutilizado na empresa para fins não-potáveis. Palavras-chave:Tratamento de efluentes; reuso de água; contaminantes.

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“…The authors indicated that the majority of the dyes belong to azo groups which typically feature high stability and pose carcinogenic effects on the environmental ecosystems. Casado (2019) summarized the efficiency of adopting electro-Fenton technologies to treat industrial effluent. The authors mentioned that electron-Fenton method has been very effective in treating non-biodegradable organics and discusses the promising potentials of industrial application from scale-up possibility and cost-effective perspective.…”

Section: Introductionmentioning

confidence: 99%

“…Casado (2019) summarized the efficiency of adopting electro‐Fenton technologies to treat industrial effluent. The authors mentioned that electron‐Fenton method has been very effective in treating non‐biodegradable organics and discusses the promising potentials of industrial application from scale‐up possibility and cost‐effective perspective.…”

Section: Introductionmentioning

confidence: 99%

Textiles wastewater treatment technology: A review

Deng

Lamssali

Aryal

et al. 2020

Water Environment Research

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The following is a review of published literature on textile wastewater in 2019. Presented are the sections described for the review: concise introduction on the textiles wastewater, followed by a review of present textile treatment technologies organized by physicochemical, biological, and combined processes. Lastly, a discussion of the future topics is presented. © 2020 Water Environment Federation • Practitioner points • The discharge of textile dye wastewater represents a serious environmental problem and public health concern. • Effluents from textile manufacturing, dyeing, and finishing processes contain highconcentration recalcitrant chemicals that are resistant to biodegradation. • The textile wastewater needs environmental-friendly and cost-effective combined treatment process.

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Towards industrial implementation of Electro-Fenton and derived technologies for wastewater treatment: A review

Cited by 153 publications

References 177 publications

Process optimization and mechanism study of acid red G degradation by electro-Fenton- Feox process as an in situ generation of H2O2

Process optimization and mechanism study of acid red G degradation by electro-Fenton- Feox process as an in situ generation of H2O2

Utilization of the Pinus Bark for Tannin Extraction to apply with as Coagulant in the Treatment of Industrial Effluents

Textiles wastewater treatment technology: A review

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