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Methylene blue removal from aqueous solutions by electocoagulation in continuous flow reactor: Modeling and optimization of operating parameters
Ali Jafari1 , Mansour Ghaderpoori * 2
1- Department of Environmental Health Engineering, Faculty of health and nutrition, Lorestan University of Medical Sciences, Khorramabad, Iran
2- Department of Environmental Health Engineering, Faculty of health and nutrition, Lorestan University of Medical Sciences, Khorramabad, Iran , mghaderpoori@gmail.com
Abstract:   (128 Views)
Background: The application and increasingly produce of colorants, in particular synthetic dyes, are one of the environmental and health concerns especially in industrial societies. If these dyes are discharge into the environment without any control, will create many problems. Therefore, it is necessary to remove the appropriate blueprint method. The purpose of this study was to investigate the use of the electrical coagulation process to remove methylene as one of the most widely used and problematic colors of aqueous solutions.
Methods & Materials: This study was conducted on a laboratory scale and in a continuous flow electro-coagulation reactor. To better analyze and set the minimum reasonable number of tests and samples, with maintaining the statistical principles, the study was conducted using the surface-response methodology using the Box-Behnken model. The effect of operating variables and their interaction on process performance was also examined. Three independent parameters including current density (5, 7.5 and 10 mA/cm 2)) (50, 100 and 150 mg/L) and operating time (20, 60 and 100 min) were used.
Results: ANOVA test showed that color removal was affected by all independent variables and their interactions (p<0.05). In optimal conditions, in the range of the selected variables the current density of (39.7 mA/cm2) dye concentration (21.23 mg/l) and reaction time (86.47min) methylene blue removal was 99.16%.
Conclusion: This study showed that in optimal operating conditions, it can effectively remove the methylene blue dye. This method can be considered on a real scale because of its simple application and cost-tolerance.
 
Keywords: dye, electrocoagulation, methylene blue, response surface methodology
     
Type of Study: Orginal Article | Subject: Environmental Health
Received: 2019/01/12 | Revised: 2019/05/26 | Accepted: 2019/04/27 | ePublished ahead of print: 2019/05/21
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