title: Purification and detoxification of petroleum refinery wastewater by electrocoagulation process.
abstract: The treatment of synthetic oily wastewater having the characteristics of a typical petroleum refinery wastewater (PRW) by electrocoagulation (EC) using iron and aluminum electrodes was conducted in an electrolytic reactor equipped with fluid recirculation. During the treatment, the emulsion stability was followed by the measurement of Zeta potential and particle sizes. Effects of some operating conditions such as electrodes material, current density and electrolysis time on removal efficiencies of turbidity, and chemical oxygen demand (COD) were investigated in detail. The PRW purification by the EC process was found to be the most effective using aluminum as the anode and cathode, current density of 60 A/m(2) and 30 min of electrolysis time. Under these conditions, the process efficiencies were 83.52% and 99.94%, respectively, for COD and turbidity removals which correspond to final values of 96 mg O2/L and 0.5 NTU. A moderate energy consumption (0.341 kWh) was needed to treat 1 m(3) of PRW. Besides, the ecotoxicity test proved that toxic substances presented in the PRW, and those inhibiting the germination growth of whet, were eliminated by the EC technique.
authors: a Laboratoire de Génie des Procédés Industriels et de l'Environnement , Université des Sciences et de la Technologie Houari Boumediene , Alger , Algeria.
authors: N
authors: N
authors: Gousmi
authors: a Laboratoire de Génie des Procédés Industriels et de l'Environnement , Université des Sciences et de la Technologie Houari Boumediene , Alger , Algeria.
authors: A
authors: A
authors: Sahmi
authors: b Laboratoire Réaction et Génie des Procédés , Université de Lorraine , Nancy , France.
authors: H Z
authors: HZ
authors: Li
authors: b Laboratoire Réaction et Génie des Procédés , Université de Lorraine , Nancy , France.
authors: S
authors: S
authors: Poncin
authors: c Laboratoire de Biologie et Physiologie des Organismes , Université des Sciences et de la Technologie Houari Boumediene , Alger , Algeria.
authors: R
authors: R
authors: Djebbar
authors: a Laboratoire de Génie des Procédés Industriels et de l'Environnement , Université des Sciences et de la Technologie Houari Boumediene , Alger , Algeria.
authors: K
authors: K
authors: Bensadok
mesh_terms: D057919:Biological Oxygen Demand Analysis; D004564:Electrocoagulation / Q000379:methods*; D007220:Industrial Waste / Q000032:analysis*; D000066388:Oil and Gas Industry; D010578:Petroleum; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D007220:Industrial Waste; D010578:Petroleum; D062065:Wastewater
keywords: Petroleum wastewater purification; ecotoxicity test; electrocoagulation; energy consumption