Influence of electrochemical reduction and oxidation processes on the decolourisation and degradation of C.I. Reactive Orange 4 solutions

Río, A.I. del; Molina, J.; Bonastre, J.; Cases, F.

doi:10.1016/j.chemosphere.2009.02.063

Cited by 53 publications

(34 citation statements)

References 65 publications

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“…Our experimental results reveal that only the electrolyte solution containing NaCl could lead to complete decoloration and a less energy consumption; this is in agreement with the works by  Cases et al [16]. Composite DSA electrodes perform well in decoloration of azo dye in chlorinated media, because it is easy to produce reactive chlorine species, this may due to the fact that the hypochlorite ion so generated would be used for the indirect electro oxidation process [16]. Some of the reactions that may occur in chlorinated media are; 2 2Cl…”

Section: Electrochemical Treatments (Ec) For the Amaranth Dye Degradasupporting

confidence: 82%

“…DSA electrodes of IrO 2 -Ru 2 O-SnO 2 -TiO 2 /Ti and Ru 2 O-SnO 2 -TiO 2 /Ti were characterized by SEM and electrochemical techniques (chronoamperometry). Results indicated that both electrodes performed equally well in aqueous solution containing NaCl; because electrodes are capable of generating hypochlorite ions at the pH range of 6 -8, since the hypochlorite ion is a strong oxidant; it is used to degrade the Amaranth in the solution [16]. However there was no clear trend showing the effect for the selected applied potential in this work.…”

Section: Discussioncontrasting

confidence: 39%

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Electrochemical and Photoelectrochemical Decoloration of Amaranth Dye Azo Using Composited Dimensional Stable Anodes

Salazar‐Gastélum¹,

Reynoso‐Soto²,

Lin³

et al. 2013

JEP

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In this paper we report the results of our experimental work conducted to decoloration of a well-known highly toxic Amaranth dye by electrochemical and photoelectrochemical methods. Used throughout this investigation were two different Dimensional Stable Anode (DSA) electrodes, namely, IrO 2 -Ru 2 O-SnO 2 -TiO 2 /Ti and Ru 2 O-SnO 2 -TiO 2 /Ti. The experimental results show that IrO 2 -Ru 2 O-SnO 2 -TiO 2 /Ti electrode has higher performance on amaranth decoloration than Ru 2 O-SnO 2 -TiO 2 /Ti electrode, but with the disadvantage of higher energy consumption. For higher degradation of Amaranth dye with both DSA electrodes, the process was carried out via photoelectrochemical method. Our experimental results clearly shown the decrease in absorbance of all UV-Vis peaks due to the mineralization of the azo dye; also, it was noteworthy photoelectrochemical process consumes less energy under the same experimental conditions than electrochemical process. The IrO 2 -Ru 2 O-SnO 2 -TiO 2 /Ti electrode reaches a higher degradation degree of Amaranth solutions than Ru 2 O-SnO 2 -TiO 2 /Ti electrode using a photoelectrochemical technique.

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Section: Electrochemical Treatments (Ec) For the Amaranth Dye Degradasupporting

confidence: 82%

Section: Discussioncontrasting

confidence: 39%

Electrochemical and Photoelectrochemical Decoloration of Amaranth Dye Azo Using Composited Dimensional Stable Anodes

Salazar‐Gastélum¹,

Reynoso‐Soto²,

Lin³

et al. 2013

JEP

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“…Reactive Orange 4 solutions were also investigated at OCP. These oxido-reduction processes were carried out according to the experiments reported in references [13,14].…”

Section: Secm Analysesmentioning

confidence: 99%

On the behaviour of doped SnO2 anodes stabilized with platinum in the electrochemical degradation of reactive dyes

Río

Fernández

Molina

et al. 2010

Electrochimica Acta

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“…Typical examples of widely used anodes include Fe [27], steel [28,29], Al [30], Dimensionally Stable Anodes (DSA) composed of mixtures of Ti, Ir, Ru, Sn, Pb and/or Sb oxides [31][32][33], Pt [29,34] or Tisupported Pt [35], granular activated carbon [14], activated carbon fiber (ACF) [15], glassy carbon [16], graphite [17], polypyrrole [18], perovskite-like BaPb 0.9 Sb 0.1 O 3 [19] and BDD deposited mainly on Si [20], Ti [21] or Nb [7] substrates. These electrodes could be used either for direct (occurring at the surface of the anode) or for indirect oxidation processes such as the homogeneous reaction of organic pollutants with strong oxidants (like active chlorine [36], or hydroxyl radicals via Fenton's reaction [37]).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical degradation of Reactive Red 120 using DSA and BDD anodes

et al. 2010

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Electrochemical oxidation of an azo dye (Reactive Red 120) was studied in acidic media (1 M HClO 4 ) using DSA type (Ti/IrO 2 -RuO 2 ) and boron doped diamond (BDD) anodes. Ti/IrO 2 -RuO 2 exhibited low oxidation power with high selectivity to organic intermediates and low TOC removal (10% at 25°C and 40% at 80°C). On the other hand BDD was found to be suitable for total mineralization of the organic loading to CO 2 . In both cases, the decoloration of the solution was almost 100% achieved very quickly with BDD (2 Ah L -1 ) but only after long treatment with Ti/IrO 2 -RuO 2 (25 Ah L -1 ). The instantaneous current efficiency (ICE) was up to 0.13 in the case of Ti/IrO 2 -RuO 2 and up to 0.45 in the case of BDD.

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Influence of electrochemical reduction and oxidation processes on the decolourisation and degradation of C.I. Reactive Orange 4 solutions

Cited by 53 publications

References 65 publications

Electrochemical and Photoelectrochemical Decoloration of Amaranth Dye Azo Using Composited Dimensional Stable Anodes

Electrochemical and Photoelectrochemical Decoloration of Amaranth Dye Azo Using Composited Dimensional Stable Anodes

On the behaviour of doped SnO2 anodes stabilized with platinum in the electrochemical degradation of reactive dyes

Electrochemical degradation of Reactive Red 120 using DSA and BDD anodes

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