Removal of reactive blue dye from simulated wastewater by electrocoagulation using bipolar connection mode

Abstract

Abstract The present study aims to remove reactive blue dye (RBD) from simulated wastewater using a batch electrocoagulation reactor connected to a power source in a bipolar-parallel mode. The aluminum electrodes used in this work have been configured to be the interior two as perforated-plates while the outer two plates as not perforated. This investigation have conducted under the effect of the reaction time, voltage applied, and pH according to the ranges (2-80 min), (15-25 volt), and (4-12), respectively. The experimental design and the analysis of results obtained have done using response surface methodology (RSM) type central composite design (CCD) and Minitab-statistical program. The core findings revealed the treatability of the present configuration of electrodes to achieve higher removal efficiency of RBD. The complete RBD-removal was attained at the optimum values of the operating variables which were 43.75 min, 17.62 volt, and 4 of the reaction time, voltage applied, and pH, respectively. The mathematical models were significant according to the ANOVA test (p<0.001). This study proved the ability of the electrocoagulation technology to remove RBD from wastewater using the present configuration of electrodes.