Mineralization of Acid Yellow 36azo dye by electro-Fenton and solar photoelectro-Fenton processes with a boron-doped diamond anode

Ruiz, Edgar J.; Arias, Conchita; Brillas, Enric; Hernández-Ramírez, Aracely; Peralta‐Hernández, Juan M.

doi:10.1016/j.chemosphere.2010.11.013

Cited by 211 publications

(118 citation statements)

References 31 publications

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“…The mineralization current efficiency (MCE) values for each trial at current I (in A) and time t (in h) was then estimated as follows [37]:…”

Section: Apparatus and Analytical Proceduresmentioning

confidence: 99%

“…Encouraging results have been obtained for the treatment of textile azo dyes by EAOPs with a BDD anode [36][37][38][39][40], and very recently we have even discussed the behaviour of two food azo dyes in such systems [41,42]. In the present work, aiming to gain more thorough knowledge about the fate of food azo-colours upon application of EAOPs, Ponceau 4R has been chosen as a model pollutant.…”

Section: Introductionmentioning

confidence: 96%

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Routes for the electrochemical degradation of the artificial food azo-colour Ponceau 4R by advanced oxidation processes

Thiam

Brillas

Garrido

et al. 2016

Applied Catalysis B: Environmental

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a b s t r a c tThe performance of three electrochemical advanced oxidation processes, namely electro-oxidation with electrogenerated H 2 O 2 (EO-H 2 O 2 ), electro-Fenton (EF) and photoelectro-Fenton (PEF) for the treatment of aqueous solutions of the food azo dye Ponceau 4R in an undivided cell with a BDD anode and an airdiffusion cathode was compared in terms of colour, dye concentration and total organic carbon (TOC) removals. PEF treatments in ultrapure water with Na 2 SO 4 were performed to assess the effect of current density, as well as supporting electrolyte and dye concentrations. At 100 mA cm −2 , solutions of 130 mL of 254 mg L −1 of the dye in 0.05 M Na 2 SO 4 became colourless and totally mineralized after 50 and 240 min, respectively, which can be explained by the synergistic action of BDD( • OH) at the anode surface and homogeneous • OH formed in the bulk from Fenton's reaction promoted in the presence of Fe 2+ catalyst. Furthermore, UVA photons induced the continuous Fe 2+ regeneration and photolytic decomposition of refractory intermediate complexes. In that aqueous matrix, the cleavage of the dye molecules proceeded through several reaction routes to yield N-containing and non-N-containing derivatives with one or two aromatic rings, short-chain aliphatic carboxylic acids and inorganic ions. Oxalic and oxamic acids and sulfate ions were accumulated at different rates in EO-H 2 O 2 , EF and PEF. The three methods allowed the progressive decontamination of Ponceau 4R solutions in a real water matrix even without the addition of electrolyte, although complete TOC abatement after 360 min at 33.3 mA cm −2 was only ensured by the iron-catalyzed PEF process.

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“…The mineralization current efficiency (MCE) values for each trial at current I (in A) and time t (in h) was then estimated as follows [37]:…”

Section: Apparatus and Analytical Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Routes for the electrochemical degradation of the artificial food azo-colour Ponceau 4R by advanced oxidation processes

Thiam

Brillas

Garrido

et al. 2016

Applied Catalysis B: Environmental

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“…Densidad de corriente: (,) 25, (,) 50, (,) 100 y (,) 150 mA cm -2 . [Ruiz et al, 2011]. Índice en nuestro laboratorio se ha construido una planta de flujo solar que pueda actuar de forma autónoma y que podría usarse en lugares remotos, sin acceso a la red eléctrica.…”

Section: Planta De Flujo Solar Autónomaunclassified

Procesos de oxidación avanzada en el ciclo integral del agua

Chiva¹,

Clavijo²,

Cuenca³

et al. 2017

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“…Scientists have proposed several degradation processes to remediate water containing highly toxic organic compounds such as dyes, herbicides, pesticides, pharmaceuticals, and detergents, among other contaminants. [1][2][3][4][5] However, the industrial application of remediation processes requires the design of cheaper and more efficient methods with minimum side effects.…”

Section: Introductionmentioning

confidence: 99%

Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA^®-Type Electrode

Silva

Andrade

2015

Journal of the Brazilian Chemical Society

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We investigated the photoelectrochemical oxidation of the dye Reactive Blue 4 in the presence of a DSA ® -type electrode of nominal composition Ti/Ru 0.3 Ti 0.7 O 2 under ultraviolet radiation, aiming to enhance the degradation yields of this dye. We conducted the photoelectrocatalytic treatment under galvanostatic control, using an 80 W mercury vapor lamp as the UV source. We also compared unassisted electrooxidative processes and photocatalytic processes with photoelectrochemical oxidation, to gain better insight into the employed advanced oxidation processes and to evaluate their applicability. The photoelectrooxidative process conducted at 37.8 mA cm -2 promoted fast color removal in the tested solution. The chemical oxygen demand and total organic carbon decreased by approximately 64.7 and 42.7%, respectively. High performance liquid chromatography, gas chromatography coupled to mass spectrometry helped to identify the intermediate compounds produced along the photoelectrochemical process, namely phthalic anhydride, phthalimide, phthalide, 1,3-indanone, and benzoic acid.

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Mineralization of Acid Yellow 36azo dye by electro-Fenton and solar photoelectro-Fenton processes with a boron-doped diamond anode

Cited by 211 publications

References 31 publications

Routes for the electrochemical degradation of the artificial food azo-colour Ponceau 4R by advanced oxidation processes

Routes for the electrochemical degradation of the artificial food azo-colour Ponceau 4R by advanced oxidation processes

Procesos de oxidación avanzada en el ciclo integral del agua

Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA^®-Type Electrode

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Mineralization of Acid Yellow 36azo dye by electro-Fenton and solar photoelectro-Fenton processes with a boron-doped diamond anode

Cited by 211 publications

References 31 publications

Routes for the electrochemical degradation of the artificial food azo-colour Ponceau 4R by advanced oxidation processes

Routes for the electrochemical degradation of the artificial food azo-colour Ponceau 4R by advanced oxidation processes

Procesos de oxidación avanzada en el ciclo integral del agua

Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode

Contact Info

Product

Resources

About

Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA^®-Type Electrode