Study of the electrochemical oxidation and reduction of C.I. Reactive Orange 4 in sodium sulphate alkaline solutions

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

doi:10.1016/j.jhazmat.2009.06.147

Cited by 34 publications

(19 citation statements)

References 65 publications

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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%

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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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“…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%

“…(2) and (3), respectively. L range [0 [4][5][6][7][8][9][10][11][12][13][14][15]. where L = d/a (d is the UME-substrate separation and a is the tip radius) and IT(L) the normalized current defined as a function of L.…”

mentioning

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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“…The band at 3447.95 cm −1 corresponds to the N-H stretching vibration [10], while the peak appeared at 1717.62 cm −1 belongs to the carbonyl region and can be ascribed to -C = O stretching vibration [38]. The appearance of peak at 1594.80 cm −1 which shows the -N-H bending mode suggests the formation of the amino group by the cleavage of azo bond [39]. …”

Section: Resultsmentioning

confidence: 99%

Decolorization of synthetic textile wastewater using electrochemical cell divided by cellulosic separator

Najafpoor

Davoudi

Salmani

2017

J Environ Health Sci Engineer

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BackgroundAnnually, large quantities of dyes are produced and consumed in different industries. The discharge of highly colored textile effluents to the aquatic environments causes serious health problems in living organisms. This paper investigates the performance of each of the electro-oxidation and electro-reduction pathways in the removal of reactive red 120 (RR120) from synthetic textile effluents using a novel electrochemical reactor.MethodsIn the current study, a two-compartment reactor divided by cellulosic separator was applied in batch mode using graphite anodes and stainless steel cathodes. Central Composite Design was used to design the experiments and find the optimal conditions. The operational parameters were initial dye concentration (100–500 mg L−1), sodium chloride concentration (2500–12,500 mg L−1), electrolysis time (7.5–37.5 min), and current intensity (0.06–0.3 A).ResultsThe results showed that electro-oxidation was much more efficient than electro-reduction in the removal of RR120. According to the developed models, current intensity was the most effective factor on the electro-oxidation of RR120 as well as in power consumption (Coefficients of 12.06 and 0.73, respectively). With regard to the dye removal through electro-reduction, electrolysis time (coefficient of 8.05) was the most influential factor. Under optimal conditions (RR120 = 200 mg.L−1, NaCl = 7914.29 mg.L−1, current intensity = 0.12 A, and reaction time = 30 min), the dye was removed as 99.44 and 32.38% via electro-oxidation and electro-reduction mechanisms, respectively, with consuming only 1.21 kwhm−3 of electrical energy.ConclusionsAccording to the results, electro-oxidation using graphite anodes in a cell divided by cellulosic separator is very efficient, compared to electro-reduction, in the removal of RR120 from aqueous solutions.

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“…Some papers report the BDD as a good candidate for the degradation of organic pollutants due to its high overpotential for O 2 evolution leading to a high current efficiency (31,32) . Furthermore, the BDD/Ti presents a high electric conductivity as well as a chemical and electrochemical inertia associated to its high mechanical resistance.…”

Section: Electrochemical Degradation Of the Dye Ro16mentioning

confidence: 99%

Optimization of a promising technology to degrade the persistent azo-dye (RO16) using boron doped diamond electrodes

Migliorini¹,

Alegre²,

Alves³

et al. 2014

RBAV

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The electrochemical degradation of the reactive orange 16 azo-dye (RO16) using boron doped diamond (BDD) electrodes grown on titanium substrate (BDD/Ti) is presented. Two different electrodes, produced at growth times of 7 and 24 h, were used and named as E1 and E2, respectively. Both of them are highly doped, with the acceptor concentration of around 7.0 x 10 20 cm -3 , evaluated by the Raman spectra. The morphological and the physical characterization confirmed the best diamond purity of E2 electrode associated with its largest and well faceted grains as well as with its lowest sp 2 content. This behavior was attributed to the diamond columnar growth dominance after the stead state process, observed for the films with a thickness higher than 3.0 mm. The electrode efficiencies were studied to degrade electrochemically the RO16 dye. The results were analyzed by UV/VIS spectroscopy, by total organic carbon (TOC) and by high-performance liquid chromatography (HPLC) techniques. The electrode E2 showed the best efficiency for both, the aromaticity reduction and the azo group fracture, from UV/VIS spectra. These tendencies were confirmed by the TOC and the chromatographic measurements. The direct relationships among the BDD morphology, physical property, and performance during the degradation process were discussed.Keywords: Electrochemical oxidation; Reactive orange 16 dye; Boron doped diamond. Resumo É apresentada neste trabalho a degradação eletroquímica do corante Reativo alaranjado 16 (RO16) utilizando eletrodos de diamante dopado com boro sobre substrato de titânio (BDD/Ti). Dois eletrodos diferentes, produzidos com tempo de crescimento de 7 e 24 h, foram utilizados e denominados como

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Study of the electrochemical oxidation and reduction of C.I. Reactive Orange 4 in sodium sulphate alkaline solutions

Cited by 34 publications

References 65 publications

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

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

Decolorization of synthetic textile wastewater using electrochemical cell divided by cellulosic separator

Optimization of a promising technology to degrade the persistent azo-dye (RO16) using boron doped diamond electrodes

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