Fractional Factorial Design Study on the Performance of GAC-Enhanced Electrocoagulation Process Involved in Color Removal from Dye Solutions

Materials

Marius Sebastian Secula¹  Igor Cretescu¹  Benoit Cagnon³  Liliana Rozemarie Manea²  Corneliu Sergiu Stan¹ 

[1] Faculty of Chemical Engineering and Environmental Protection, Gheorghe Asachi Technical University of Iasi, 73, Prof. Dimitrie Mangeron Street, Iasi 700050, Romania; E-Mails:;Faculty of Textile, Leather and Industrial Management, Gheorghe Asachi Technical University of Iasi, 29, Prof. Dimitrie Mangeron Street, Iasi 700050, Romania; E-Mail:;Research Center on Divided Matter, CNRS—University of Orléans, 1B, rue de la Férollerie 45071 Orléans cedex 2, France; E-Mail:

关键词: electrocoagulation;    granular activated carbon;    coupling process;    fractional factorial design;    Acid Blue 74;    Basic Red 1;    Reactive Black 5;    alternating pulse current;   

DOI  :  10.3390/ma6072723

来源: mdpi

【 摘 要 】

The aim of this study was to determine the effects of main factors and interactions on the color removal performance from dye solutions using the electrocoagulation process enhanced by adsorption on Granular Activated Carbon (GAC). In this study, a mathematical approach was conducted using a two-level fractional factorial design (FFD) for a given dye solution. Three textile dyes: Acid Blue 74, Basic Red 1, and Reactive Black 5 were used. Experimental factors used and their respective levels were: current density (2.73 or 27.32 A/m²), initial pH of aqueous dye solution (3 or 9), electrocoagulation time (20 or 180 min), GAC dose (0.1 or 0.5 g/L), support electrolyte (2 or 50 mM), initial dye concentration (0.05 or 0.25 g/L) and current type (Direct Current—DC or Alternative Pulsed Current—APC). GAC-enhanced electrocoagulation performance was analyzed statistically in terms of removal efficiency, electrical energy, and electrode material consumptions, using modeling polynomial equations. The statistical significance of GAC dose level on the performance of GAC enhanced electrocoagulation and the experimental conditions that favor the process operation of electrocoagulation in APC regime were determined. The local optimal experimental conditions were established using a multi-objective desirability function method.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.