Electrochemical decolorization of Methylene blue at Pt electrode in KCl solution for environmental remediation

Hasnat, Mohammad A.; Safwan, Jamil A.; Islam, Shariful; Rahman, Zidnia; Karim, Mohammad Razaul; Pirzada, Talha J.; Samed, Ahmed Jalal; Rahman, Mohammed M.

doi:10.1016/j.jiec.2014.04.013

Cited by 46 publications

(17 citation statements)

References 26 publications

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“…With the use of NaCl, there is generation of hypochlorite radical. Its oxidative effect has already been evaluated in research on dye wastewaters (Hasnat et al, 2015;Rosa et al, 2015) and other organic contaminants (Chen et al, 2013) using chlorinated supporting electrodes, where it was supposed that hypochlorite electrochemically generated from chloride oxidation on the electrode surface was responsible for the organic molecule degradation. Chloride ions can be oxidized to form the strong oxidizing species hypochlorite as per the following reactions:…”

Section: Values Of Molecular Uv-vis Absorbance For Eo and Peomentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Direct Photolysis, Electrooxidation and Photoelectrooxidation for Rhodamine-B Degradation

Benvenuti

Gabriel

Heberle

et al. 2018

Braz. J. Chem. Eng.

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The focus of this study is to evaluate the efficiency of oxidation processes in the treatment of a solution containing Rhodamine-B (RhB) used in various industrial applications. The advanced oxidation processes of electrooxidation (EO) and photoelectrooxidation (PEO) were used. At the same time, direct photolysis (DP) was also applied. Total organic carbon (TOC) reduction and color removal were evaluated. There was an efficient color removal when DP was performed, and the color removal efficiency was the highest when NaCl was used as supporting electrolyte for PEO and EO. However, the TOC reduction was low, indicating that the degradation of the color does not correspond to the pollutant mineralization.

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Section: Values Of Molecular Uv-vis Absorbance For Eo and Peomentioning

confidence: 99%

“…Moreover, this wastewater generates chemical oxygen demand (COD) and biochemical oxygen demand (BOD), solubilized nutrients (for example, nitrogen and phosphorus) and can contaminate the water with metals. Still, certain classes of dyes, as well as their by-products, can be carcinogenic and/or mutagenic (Hasnat et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Direct Photolysis, Electrooxidation and Photoelectrooxidation for Rhodamine-B Degradation

Benvenuti

Gabriel

Heberle

et al. 2018

Braz. J. Chem. Eng.

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“…The anodic material is very important for the electrochemical oxidation processes. Various materials are used as anodes: Pt [7,8], boron-doped diamond [9], graphite [10] activated carbon fiber [11] and electrodes based on metal oxides, such as PbO2, RuO2, IrO2, SnO2, SbOx etc. and their mixtures.…”

Section: Ho2• + H2o2→ •Oh + H2o + O2 Eq (3)mentioning

confidence: 99%

Synthesis and characterization of new Ti–Bi2O3 anode and its use for reactive dye degradation

Petrović

Mitrović

Antonijević

et al. 2015

Materials Chemistry and Physics

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This paper reports the synthesis, characterization and application of a Ti-Bi2O3 anode for the electrochemical decolorization of the textile dye Reactive Red 2. The anode was synthesized by electrodeposition on a Ti substrate immersed in an acidic bismuth (III) solution at constant potential, followed by calcination in air at 600°C. Thermogravimetric Analysis (TGA), Energydispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) analysis revealed that the electrodeposited material was predominantly metallic bismuth, which was oxidized to pure α-Bi2O3 during the calcination in air. SEM micrographs revealed that the Bi2O3 coat at the anode surface was inhomogeneous and porous. Reactive Red 2 was completely electrochemically decolorized at the synthesized anode in the presence of H2O2. The applied current density, H2O2 and Na2SO4 concentration, medium pH and initial dye concentration affected the dye decolorization rate. The optimal process parameters were found to be as follows: an applied current density of 40 mA cm -2 using a mixture of 10 mmol dm -3 H2O2 and 10 mmol dm -3 Na2SO4 at pH 7. The dye decolorization rate was shown to decrease as its initial concentration increased. The decolorization reactions were found to follow pseudo-first order kinetics.

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“…The material for electrode fabrication plays a major role in determining the efficiency and reactivity of the prepared electrode in an electrochemical reaction. Various electrodes were used in the treatment of synthetic dyes and textile industrial effluents, such as Pt, [14][15][16] boron-doped diamond (BDD), [17][18][19] and dimensionally stable anodes (DSA). [20][21][22] In the current study, metal/graphite composite electrodes were prepared by mixing two different material (metal and graphite) powders with polyvinyl chloride (PVC).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Degradation of Reactive Blue 21 and Synthetic Textile Effluent by Using Co47.5/C47.5-PVC5 Composite Electrode

Nordin

Pisal²,

Razman³

et al. 2019

ACSi

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In this study, cobalt/graphite-polyvinyl chloride (Co 47.5 /C 47.5 -PVC 5 ) composite electrode was fabricated by mechanical alloying technique. The fabricated electrode and graphite rod were used as anode and cathode, respectively, in the decolourisation of aqueous C. I. Reactive Blue 21 (RB21) and synthetic textile effluent, containing a mixture of azo and anthraquinone dyes. The fabricated electrode showed high efficiency in the decolorisation of aqueous RB21 (99.95%) and synthetic textile effluent. This is further confirmed by the high reduction percentage (>75%) of COD and BOD 5 for both treated samples. The elemental composition study by using FESEM-EDX showed no significant changes in the composition of elements (C, Co and Cl) in the freshly fabricated electrode and after electrolysis of synthetic textile effluent. This showed that the fabricated electrode has a high mechanical strength and strong binding ability between C and Co due to the use of PVC as a binder.

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Electrochemical decolorization of Methylene blue at Pt electrode in KCl solution for environmental remediation

Cited by 46 publications

References 26 publications

Evaluation of Direct Photolysis, Electrooxidation and Photoelectrooxidation for Rhodamine-B Degradation

Evaluation of Direct Photolysis, Electrooxidation and Photoelectrooxidation for Rhodamine-B Degradation

Synthesis and characterization of new Ti–Bi2O3 anode and its use for reactive dye degradation

Electrochemical Degradation of Reactive Blue 21 and Synthetic Textile Effluent by Using Co47.5/C47.5-PVC5 Composite Electrode

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