| Autor: |
Secula MS; Faculty of Chemical Engineering and Environmental, Gheorghe Asachi Technical University of Iasi, Protection, 73, Prof. Dimitrie Mangeron Street, Iasi 700050, Romania. mariussecula@ch.tuiasi.ro., Cretescu I; Faculty of Chemical Engineering and Environmental, Gheorghe Asachi Technical University of Iasi, Protection, 73, Prof. Dimitrie Mangeron Street, Iasi 700050, Romania. icre@ch.tuiasi.ro., Cagnon B; Research Center on Divided Matter, CNRS-University of Orléans, 1B, rue de la Férollerie 45071 Orléans cedex 2, France. benoit.cagnon@cnrs-orleans.fr., Manea LR; Faculty of Textile, Leather and Industrial Management, Gheorghe Asachi Technical University of Iasi, 29, Prof. Dimitrie Mangeron Street, Iasi 700050, Romania. lmanea@tex.tuiasi.ro., Stan CS; Faculty of Chemical Engineering and Environmental, Gheorghe Asachi Technical University of Iasi, Protection, 73, Prof. Dimitrie Mangeron Street, Iasi 700050, Romania. stancs@tuiasi.ro., Breaban IG; Department of Geography, Faculty of Geography and Geology, Alexandru Ioan Cuza University of Iasi, 20A, Blvd. Carol I, Iasi 700505, Romania. iulianab@uaic.ro. |
| Abstrakt: |
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. |
