Electrocoagulation of Azo-2-Naphthol Dye Using Aluminium Electrodes: Effect of Solvent and Kinetics of Adsorption

Mkpenie, Victor; Abakedi, Okon U.

doi:10.3923/crc.2015.34.43

Cited by 6 publications

(3 citation statements)

References 41 publications

(29 reference statements)

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“…It is means that the kinetic of MB removal obeys to pseudo second-order. Similar results have been reported previously by several authors while determining the most suitable kinetic model for 1-phenylazo-2-naphthol (PAN), alizarin saphirol (AS), indigo carmine (IC) [1,[27][28][29][30]. On the other hand, other researchers determined the pseudo-first order as a suitable model to describe the kinetics for the following dyes: Rhodamine B (RhB), alizarin red S (ARS), methyl orange (MO), congo red (CR), methylene blue (BMylene), methyl blue (BM-yl) [14,20,27,29,[31][32][33][34].…”

Section: Determination Of Kinetic Model For Mb Removalsupporting

confidence: 85%

Removal of Methylene Blue in aqueous solutions by Electrocoagulation process: Adsorption, Kinetics, studies

et al. 2018

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The purpose of this study is to understand the mechanism driving the removal of methylene blue through electrocoagulation process. Experiments were carried out using iron as anode and cathode in a batch electrochemical cell operated in a monopolar configuration. The effects of operating parameters (initial pH, current density, initial dye concentration and energy consumption) on the removal of methylene blue from solution were investigated. The results showed that the optimum removal efficiency of 93.2% was achieved for a current density of 9.66 mA/cm2, optimal pH of 8±0.01 with a specific energy consumption of 7.451 kWh/m3. Afterwards, first and second-order rate equations were successively applied to study adsorption kinetics models. On top of usual correlation coefficients (r2), statistical test Chi-square (χ2) were applied to evaluate goodness of fit and consequently find out the best kinetic model. Results showed that MB adsorption process onto iron hydroxides formed in aqueous solution during electrocoagulation treatment followed a second-order kinetic.

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Section: Determination Of Kinetic Model For Mb Removalsupporting

confidence: 85%

Removal of Methylene Blue in aqueous solutions by Electrocoagulation process: Adsorption, Kinetics, studies

et al. 2018

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“…The hydrogen gas also helps to remove the flocculated particles from the water. 22 In our previous work on EC, we investigated azo-2-naphthol, 23 a compound widely used as a dye in industries. In the present study, we investigate the EC of bromothymol blue (BTB) (1), which acts as a weak acid in solution.…”

Section: Introductionmentioning

confidence: 99%

Parameterization, kinetics, and adsorption isotherm of electrocoagulation processof bromothymol blue in aqueous medium using aluminum electrodes

Abakedi¹,

Mkpenie²,

Okafor³

2019

Turk J Chem

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The removal of bromothymol blue (BTB) from aqueous solution was studied by electrocoagulation (EC) technique using aluminum electrodes. The various experimental conditions known to influence the EC process were parameterized, including the effects of temperature, concentration, current density, pH, and treatment time. The results obtained have shown that optimum removal efficiency of 99.9% was realized at a current density of 20 mA/cm 2 and pH of 4.7. The adsorption process showed a pseudo-first-order kinetic model as the best fit to the EC data. Freundlich and Langmuir adsorption isotherms supported the adsorption of BTB on aluminum hydroxide being the in situ generated electrocoagulant. From the thermodynamic parameters, the adsorption of BTB is spontaneous, as indicated by the negative value of the Gibbs free energy.

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“…This study proposed the use of a combination of electrocoagulation and photocatalysis for the simultaneous treatment of batik waste. Electrocoagulation is a continuous coagulation process that uses direct current through electrochemical events and electrolyte decomposition, with one of the electrodes being aluminum or iron (Mkpenie & Abakedi, 2015). Photocatalysis is used for degrading organic compounds, e.g., phenolic compounds and hexavalent chromium (Cr[VI]), and reducing the content of the metal ions in batik waste simultaneously with the help of ultraviolet (UV) light.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Batik Industry Waste with a Combination of Electrocoagulation and Photocatalysis

Sharfan

Shobri

Anindria

et al. 2018

IJTech

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This study successfully investigated the treatment of batik industry waste with a combination of electrocoagulation and photocatalysis. The use of an aluminum plate as an anode, a stainless steel 316 plate as a cathode, and titanium dioxide (TiO2) coated on aluminum plates, the main materials in this method, resulted in the simultaneous decolorization of Remazol Red dye, elimination of 2,4,6-trichlorophenol, and reduction of hexavalent chromium (Cr[VI]). For the TiO2 coating, a TiO2 suspension was applied to a sanded aluminum plate. Optimal performance of the combination of electrocoagulation and photocatalysis was achieved under operating conditions of 15 V DC electric voltage, an initial pH value of 7, and the use of an aeration flow. Under the operating conditions, 600 ml batik waste containing 5 mg/L 2,4,6-trichlorophenol, 3 mg/L Cr(VI), and 390 PtCo Remazol Red dye were eliminated simultaneously within 4 hours with conversions of approximately 58%, 100%, and 97%, respectively.

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Electrocoagulation of Azo-2-Naphthol Dye Using Aluminium Electrodes: Effect of Solvent and Kinetics of Adsorption

Cited by 6 publications

References 41 publications

Removal of Methylene Blue in aqueous solutions by Electrocoagulation process: Adsorption, Kinetics, studies

Removal of Methylene Blue in aqueous solutions by Electrocoagulation process: Adsorption, Kinetics, studies

Parameterization, kinetics, and adsorption isotherm of electrocoagulation processof bromothymol blue in aqueous medium using aluminum electrodes

Treatment of Batik Industry Waste with a Combination of Electrocoagulation and Photocatalysis

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