Electro-Fenton degradation of the food dye amaranth using a gas diffusion electrode modified with cobalt (II) phthalocyanine

Barros, Willyam R.P.; Franco, Poliana C.; Steter, Juliana R.; Rocha, Robson da Silva; Lanza, Marcos R.V.

doi:10.1016/j.jelechem.2014.03.027

Cited by 58 publications

(18 citation statements)

References 49 publications

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“…Figure SI reported previously [14,20]. Accordingly, the AM degradation would begin with the formation of two primary amines and the azoic bond rupture, followed by the attack from • OH radicals and subsequent decarboxylation and hydroxylation processes.…”

Section: Kinetic Study By Uv-vis and Hplcsupporting

confidence: 58%

“…The variation of k appDEG with the NPs composition is shown in Figure 4B. The respectively [20]. The k appDIS values are slightly lower than the k appDEG values which indicates the formation of colored products during the degradation process.…”

Section: Kinetic Study By Uv-vis and Hplcmentioning

confidence: 95%

“…The discoloration of the AM dye solution by the E-Fenton process in the presence of the NPs was quite effective as shown in Figure SI Dyes containing azo bonds can be anodicaly oxidized or reduced at the cathode [20]. So, in order to verify the influence of these electrochemical processes in the AM dye discoloration process without H 2 O 2 electrogeneration, an electrolysis test was conducted without any NPs suspended in the electrolyte and with the GDE pressurized with N 2 .…”

Section: Kinetic Study By Uv-vis and Hplcmentioning

confidence: 99%

“…The electro-Fenton (E-Fenton) process stands out among the various types of AOP, as one of the most efficient technologies for the oxidation of wastewater contaminated by dyes [19][20][21]. It is based on the generation of a powerful oxidizing radical (hydroxyl radical, • OH) in aqueous solution by reaction between electrogenerated hydrogen peroxide (H 2 O 2 ) and iron ions as catalyst (Eq.1-3) [22,23].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Catalytic activity of Fe3−Cu O4 (0 ≤x≤ 0.25) nanoparticles for the degradation of Amaranth food dye by heterogeneous electro-Fenton process

Barros

Steter

Lanza

et al. 2016

Applied Catalysis B: Environmental

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Section: Kinetic Study By Uv-vis and Hplcsupporting

confidence: 58%

Section: Kinetic Study By Uv-vis and Hplcmentioning

confidence: 95%

Section: Kinetic Study By Uv-vis and Hplcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Catalytic activity of Fe3−Cu O4 (0 ≤x≤ 0.25) nanoparticles for the degradation of Amaranth food dye by heterogeneous electro-Fenton process

Barros

Steter

Lanza

et al. 2016

Applied Catalysis B: Environmental

Self Cite

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“…One of the most efficient of these methodologies involves electrochemical degradation in which the overall mineralization of an organic compound is mediated by highly reactive hydroxyl radicals ( Á OH) that are produced in situ [24][25][26][27][28][29][30][31][32]. Additional studies have revealed that coupling the electrochemical AOP technique with ultrasonic agitation gives rise to a degradative method that is feasible and highly efficient [33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and sonoelectrochemical processes applied to the degradation of the endocrine disruptor methyl paraben

et al. 2014

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Methyl paraben is commonly employed as a preservative in pharmaceutical preparations, personal care products and some processed foods. However, the ester constitutes a potential pollutant in aquatic environments and has been classified as an endocrine disruptor. This study describes the degradation of methyl paraben (100 mg L -1 in 0.05 mol L -1 aqueous potassium sulfate at pH 5.7) by means of an electrochemical process (employing a boron-doped diamond anode) either alone or coupled with sonolysis. Electrolyses were performed at 25, 30 and 35 ± 1°C during 120 min using applied constant current densities of 10.8 and 21.6 mA cm -2 . The hybrid sonoelectrochemical processes were conducted under similar conditions with the application of ultrasound at a frequency of 20 kHz and a power intensity of 523 W cm -2 . Although mineralization of methyl paraben could be achieved using either process, in comparison with the electrochemical method, the hybrid technique showed a higher mineralization efficiency (around 60 %) with approximately 50 % removal of total organic carbon, thereby confirming the synergistic effect of sonolysis.

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Filter‐membrane treatment of continuous‐flow tetracycline through photocatalysis‐assisted peroxydisulfate oxidation

Zhu

Tang

et al. 2022

AIChE Journal

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Herein, we craft a high‐performance advanced oxidation process (AOP) of photocatalysis‐coupled peroxydisulfate (PDS) system toward practical applications in organic wastewater treatment. CoFe2O4 nanoparticles well grow onto TiO2 nanotube arrays (TNAs) mesh (CoFe2O4/TNAs). The artful CoFe2O4/TNAs composite plays a bifunctional role in the proposed AOP. On one hand, CoFe2O4/TNAs itself is a visible‐light‐response photocatalyst. On the other hand, the Co(II) or Fe(II) in CoFe2O4 can heterogeneously activate PDS to generate energetic active species (•OH, SO4˙–, O2˙–, and 1O2). Meanwhile, the photo‐induced electrons can be also captured by electron traps Co(III) (or Fe(III)) which are further reduced to Co(II) (or Fe(II)) for continuous activation of PDS. As a result, the robust AOP of photocatalysis‐coupled PDS can almost completely degrade 10 mg/L refractory tetracycline within 40 min. Moreover, the proposed process shows a stable continuous‐flow treatment performance. This work provides basic understanding and support for continuous‐flow treatment of organic wastewater by photocatalysis‐coupled PDS system.

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Electro-Fenton degradation of the food dye amaranth using a gas diffusion electrode modified with cobalt (II) phthalocyanine

Cited by 58 publications

References 49 publications

Catalytic activity of Fe3−Cu O4 (0 ≤x≤ 0.25) nanoparticles for the degradation of Amaranth food dye by heterogeneous electro-Fenton process

Catalytic activity of Fe3−Cu O4 (0 ≤x≤ 0.25) nanoparticles for the degradation of Amaranth food dye by heterogeneous electro-Fenton process

Electrochemical and sonoelectrochemical processes applied to the degradation of the endocrine disruptor methyl paraben

Filter‐membrane treatment of continuous‐flow tetracycline through photocatalysis‐assisted peroxydisulfate oxidation

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