Colour removal of three reactive dyes by UV light exposure after electrochemical treatment

Riera-Torres, M.; Gutiérrez, M.C.

doi:10.1016/j.cej.2009.10.006

Cited by 59 publications

(43 citation statements)

References 25 publications

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“…They were produced by the presence of chloride ions in the solution. 4,6 This is the main disadvantage of using the electrochemical oxidation technique in the presence of chloride ions. However, the generation of chlorinated by-products can be controlled by two things: (1) the concentration of NaCl (a greater NaCl concentration will result in greater chlorinated by-product generation) and (2) the current density (low current densities produce fewer chlorinated by-products).…”

Section: 2 Gc-ms Studymentioning

confidence: 99%

“…2 The non-biodegradable molecules in reactive dyes can be broken into smaller molecules and easily removed using this electrochemical oxidation technique. 6 The working electrode plays an important role in electrochemical studies because it acts as a site for electrooxidation and electrocatalytic reactions. Therefore, the selection of electrode materials play an important role in obtaining an electrode with the highest efficiencies for an electrochemical reaction and electrocatalytic reactivity.…”

Section: Introductionmentioning

confidence: 99%

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Decolorization of C.I. Reactive Orange 4 and Textile Effluents by Electrochemical Oxidation Technique using Silver-Carbon Composite Electrode

Nordin

Amir

Yusop³

et al. 2015

ACSi

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In this study, the electrochemical oxidation of C. I. Reactive Orange 4 (RO4) on a silver-carbon composite (AgC-PVC) electrode was studied using the cyclic voltammetry, potential liner V, and electrolysis methods. The AgC-PVC electrode was used as the working electrode in the electrochemical measurement of RO4 in the presence of NaCl as a supporting electrolyte. The UV-Vis spectra of RO4 after the electrochemical oxidation showed the complete decolorization of the solution. The electrolysis products were characterized using FTIR and GC-MS. The results showed that in the presence of OCl -as an active oxidant, RO4 molecules are broken down into several lower-molecular-weight molecules by the electrochemical technique. The electrode used was also able to reduce the COD, BOD 5 and surfactant contents in the textile effluents using a pilot scale reactor. This proved that the prepared AgC-PVC electrode was beneficial for removing both the color and other pollutants from textile effluents.

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Section: 2 Gc-ms Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Decolorization of C.I. Reactive Orange 4 and Textile Effluents by Electrochemical Oxidation Technique using Silver-Carbon Composite Electrode

Nordin

Amir

Yusop³

et al. 2015

ACSi

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“…where Q represents the specific charge consumption, U is the cell voltage (V), V is the solution volume (dm 3 ). Sodium sulphate and sodium chloride solutions were analytical grade from Merck, and RR dye solutions were freshly prepared with double-distilled water.…”

Section: Bulk Electrolysis Experiments and Analytical Proceduresmentioning

confidence: 99%

“…where n is the number of electrons consumed in the mineralization process of RR dye, F is the Faraday constant (=96 487 C mol -1 ), V s is the solution volume (dm 3 ), ∆(TOC) exp is the experimental TOC decay (mg dm -3 ), 4.32 x 10 7 is a conversion factor for units homogenization (=3 600 s h -1 x 12 000 mg of carbon mol -1 ), m is the number of carbon atoms in RR dye, I is the applied current (A), and t is time (h). The number of electrons consumed is determined based on the overall mineralization reaction of RR dye to CO 2 …”

Section: Bulk Electrolysis Experiments and Analytical Proceduresmentioning

confidence: 99%

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The degradation of reactive red dye from wastewaters by advanced electrochemical oxidation

Mo¹,

oc²,

Manea³

et al. 2012

Water Pollution XI

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In the present study, electrochemical degradation experiments were conducted to degrade a textile dye namely Reactive Red 147 (RR) from water. The process performance was assessed in terms of the electrochemical decolourisation and mineralization of aqueous RR solutions. Electrolyses were carried out under galvanostatic conditions using boron-doped diamond (BDD) electrodes in 0.1 M Na 2 SO 4 supporting electrolyte using undivided electrolytic cell. Also, the effect of in-situ electrolytic generation of chlorine/hypochlorite at BDD electrode from a mixture of 0.05 M Na 2 SO 4 and 0.05 M NaCl supporting electrolyte on the electrochemical degradation process of RR has been studied. Prior to electrolysis application, the electrochemical behaviour of RR dye on BDD electrode was characterized in both supporting electrolytes without/with chloride presence by cyclic voltammetry in order to establish the working potential-current conditions. The influence of operating variables on the electrochemical process efficiency was studied as a function of the supporting electrolyte type, current density, and the initial pH. Under all applied conditions, the complete decolourisation of dye synthetic solution was achieved after several minutes of electrolysis. Acidic medium and the chlorine/hypochlorite generation favored the decolorization and mineralization process of RR. The complete mineralization of dye synthetic solution was not achieved, and the maximum mineralization efficiency of 35% was reached under the working conditions of hypochlorite presence, which informs about the intermediates generation during the application of electrochemical process based on BDD electrodes.

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Recycling of reactive dye using semi‐interpenetrating polymer network from sodium alginate and isopropyl acrylamide

Dhanapal¹,

Subramanian²

2014

J of Applied Polymer Sci

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A sequence of semi‐interpenetrating polymer network (semi‐IPN) were synthesized by free radical photo copolymerizing acrylic acid and isopropyl acrylamide (NIPAAm) in aqueous sodium alginate (NaAlg). Their structures (FT‐IR), thermal stability (TG/DTG), morphology (SEM), mechanical properties, reactive blue 4 (RB 4) dye adsorption (624 mg/g) and its dying characteristics, reusability of dye and adsorbent were evaluated. TG thermograms of semi‐IPN in air revealed zero order kinetics for initial step thermal degradation with an activation energy of 68.68 kJ/mol. Dye adsorption showed best fit for Langmuir adsorption isotherm and the kinetics followed pseudo‐second‐order model. The water and dye diffusion kinetics followed non‐Fickian mechanism. The changes in thermodynamic parameters namely Gibbs free energy (ΔG°), entropy (ΔS°) and enthalpy (ΔH°) indicated that the adsorption was spontaneous and exothermic process for RB 4/semi‐IPN system. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40968.

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Colour removal of three reactive dyes by UV light exposure after electrochemical treatment

Cited by 59 publications

References 25 publications

Decolorization of C.I. Reactive Orange 4 and Textile Effluents by Electrochemical Oxidation Technique using Silver-Carbon Composite Electrode

Decolorization of C.I. Reactive Orange 4 and Textile Effluents by Electrochemical Oxidation Technique using Silver-Carbon Composite Electrode

The degradation of reactive red dye from wastewaters by advanced electrochemical oxidation

Recycling of reactive dye using semi‐interpenetrating polymer network from sodium alginate and isopropyl acrylamide

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