title: Electro-coagulation treatment of oily wastewater with sludge analysis.
abstract: Experiments were carried out in a batch reactor to treat the oily effluent by electro-coagulation. The influence of operating parameters such as applied current, type of electrode and electrolysis time on electro-coagulation efficiency has been critically examined. The maximum percentage removal of chemical oxygen demand (COD) was 94% under optimum experimental conditions of pH 6.7, current density 6 mA/cm², electrolysis time 40 min, and using mild steel as anode. The remaining sludge in the reactor was analyzed by energy disperse analysis of X-rays (EDAX) and scanning electron microscope (SEM) analysis. The analysis confirms that the oily pollutant was removed by electroflotation and adsorption of the oily particles of precipitate during the electro-coagulation process. Electro-coagulation can be used as an efficient treatment technique for oily wastewater.
authors.affiliation: Department of Chemical Engineering, AC Tech Campus, Anna University, Chennai 600025, India.
authors.forename: Dhorgham Skban
authors.initials: DS
authors.lastname: Ibrahim
authors.forename: N
authors.initials: N
authors.lastname: Sakthipriya
authors.forename: N
authors.initials: N
authors.lastname: Balasubramanian
mesh_terms: D000535:Aluminum / Q000737:chemistry; D057919:Biological Oxygen Demand Analysis; D004560:Electricity; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D004572:Electrolysis; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D009821:Oils / Q000302:isolation & purification*; D012722:Sewage / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission; D013816:Thermodynamics
chemical_list: D009821:Oils; D012722:Sewage; D000535:Aluminum