Removal of Methylene Blue in aqueous solutions by Electrocoagulation process: Adsorption, Kinetics, studies
Open Access
- 31 December 2018
- journal article
- Published by European Journal of Chemistry in European Journal of Chemistry
Abstract
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.Keywords
This publication has 28 references indexed in Scilit:
- Decontamination of wastewaters containing synthetic organic dyes by electrochemical methods. An updated reviewApplied Catalysis B: Environmental, 2015
- Electrocoagulation for the treatment of textile industry effluent – A reviewJournal of Environmental Management, 2013
- Electrocoagulation applications for industrial wastewaters: a critical reviewEnvironmental Technology Reviews, 2012
- Using electrocoagulation–electroflotation technology to treat synthetic solution and textile wastewater, two case studiesDesalination, 2010
- Application of low-cost adsorbents for dye removal – A reviewJournal of Environmental Management, 2009
- Decolourization of dye-containing effluent using mineral coagulants produced by electrocoagulationJournal of Hazardous Materials, 2008
- Electrochemical treatment of simulated textile wastewater with industrial components and Levafix Blue CA reactive dye: Optimization through response surface methodologyJournal of Hazardous Materials, 2008
- Electrocoagulation of methylene blue and eosin yellowish using mild steel electrodesJournal of Hazardous Materials, 2005
- Electro-coagulation of reactive textile dyes and textile wastewaterChemical Engineering and Processing - Process Intensification, 2005
- Remediation of dyes in textile effluent: a critical review on current treatment technologies with a proposed alternativeBioresource Technology, 2001