Removal of Methylene Blue in aqueous solutions by Electrocoagulation process: Adsorption, Kinetics, studies
| Autor: | Konan Edmond Kouassi, Alain Stéphane Assémian, Kopoin Adouby, Patrick Drogui, David Boa |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
021110 strategic
defence & security studies Aqueous solution Chemistry medicine.medical_treatment Inorganic chemistry 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences Kinetic energy 01 natural sciences Electrocoagulation Cathode Electrochemical cell Anode law.invention chemistry.chemical_compound Adsorption law medicine Methylene blue 0105 earth and related environmental sciences |
| Zdroj: | European Journal of Chemistry. 9:311-316 |
| ISSN: | 2153-2257 2153-2249 |
| DOI: | 10.5155/eurjchem.9.4.311-316.1736 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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