Elahe Rezaie; Mahdi Sadeghi; Ghodratollah Shams Khoramabadi
Abstract
Background and objective: One of the major environmental problems of municipal landfill is leachate. Electrochemical methods are considered for the treatment of leachate. This study aimed at the treatment of landfill leachate electrochemical method using a platinum electrode and graphite based on a laboratory ...
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Background and objective: One of the major environmental problems of municipal landfill is leachate. Electrochemical methods are considered for the treatment of leachate. This study aimed at the treatment of landfill leachate electrochemical method using a platinum electrode and graphite based on a laboratory scale. Materials & Methods: In this study, the equipment for electrochemical reactor included an anode electrode made of platinum and a cathode electrode made of graphite. Chromium and organic matter removal percentage in the electric current density range of 1, 2, 3, 4 A and reaction time of 1, 2, 3, 4, 5, 6, 7, and 8 hours were surveyed. Results: The results showed that electrical coagulation process can increase removal of organic matter and heavy metals and by increasing the time the removal of COD and BOD and chromium will increase. Meanwhile, the rate of degradation wills elevates. By increasing the intensity of electric current, the time required to achieve the same removal efficiency is reduced and by reducing the amount of electrical current, the required time increases. Conclusion:The results indicated that electrochemical process, by using a platinum electrode and graphite is a method for treating wastewater containing heavy metals, BOD and COD .Elerochemical process as a pre-treatment process can remove organic matters, heavy metals. It also reduces the organic load and increases the degradation of sewage. The method can be used as an effective option for the treatment of sewage, prevention of environmental pollution, and protection of water supplies.