الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 32 |  |  |
| | | from | 32 | | |
Abstract
Clean water has become rare because of industrial progress and population growth and urbanization, so the re-use of wastewater has become a necessity to overcome the problem of water scarcity. Not only waste water, but all the water that has already used both in homes or in factories.The present work is concerned with evaluating the performance of electrocoagulation as an alternative wastewater treatment technique. Electrocoagulation is an important water treatment technology that has been widely used for removing heavy metals, inorganic and organic pollutants, it is also an efficient technique compared to other processes because it is cost effective, easy to operate and reduce the possibility of generation of secondary pollutants.An electrocoagulation cell consisted of two rectangular stainless steel mesh screen cathode and two Al sheets anode separated by 2 cm gap is used. A synthetic solution of potassium dihydrogen phosphate was used to simulate wastewater.The effect of different parameters including current density, electrolysis time, initial phosphate concentration, temperature, initial solution pH, NaCl concentration and different types of electrolyte was investigated. The study was found that the percentage of phosphate removal was increase with increasing the applied current density( 2.27mA/cm2). Also, the phosphate removal was found to increase with increasing time until the removal reaches an approximately constant value at 60 min and then the time has no significant effect. In addition, it was found that the phosphate removal percentage decrease with increasing initial phosphate concentration and it was increase with increasing NaCl concentration.Calculations showed that as the current density increases, power consumption increases where as NaCl and initial phosphate concentration increases, power consumption decreases.Another calculations showed that as NaCl and initial phosphate concentration increases aluminum consumption decreases where as the current density increases, aluminum consumption increases. Finally, the kinetics study revealed that the rate of phosphate removal follows second-order reaction kinetics.