Optimization of electrochemical treatment of industrial paint wastewater with response surface methodology.
The electrochemical oxidation of water-based paint wastewater was investigated batch-wise in the presence of NaCl electrolyte with carbon electrodes for the first time in literature. The electrochemical treatment conditions were optimized using response surface methodology where potential difference, reaction temperature and electrolyte concentration were to be minimized while chemical oxygen demand (COD), color and turbidity removal percents and initial COD removal rate were maximized at 100% pollution load. The optimum conditions were satisfied at 35 g/L external electrolyte concentration, 30 degrees C reaction temperature and 8 V potential difference (64.37 mA/cm(2) current density) realizing 51.8% COD and complete color and turbidity removals, and 3010.74 mg/Lh initial COD removal rate. According to these results, the electrochemical method could be a strong alterative to conventional physicochemical methods for the treatment of water-based paint wastewater.
Körbahti
Bahadir K
BK
Faculty of Engineering, Department of Chemical Engineering, University of Mersin, Ciftlikköy 33343, Mersin, Turkey. korbahti@mersin.edu.tr
Aktaş
Nahit
N
Tanyolaç
Abdurrahman
A
D002617:Chemical Industry; D003116:Color; D004563:Electrochemistry / Q000379:methods* / Q000592:standards; D052918:Environmental Restoration and Remediation / Q000379:methods*; D007220:Industrial Waste / Q000517:prevention & control*; D010084:Oxidation-Reduction; D010150:Paint; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry; D018508:Water Purification / Q000379:methods
D007220:Industrial Waste; D014874:Water Pollutants, Chemical