University Of Tehran Press Pollution 2383-451X 5 1 2019 01 01 Landfill Leachate Treatment through Electro-Fenton Oxidation 199 209 69021 10.22059/poll.2018.249210.364 EN S. Mohajeri School of Civil Engineering, University of Science Malaysia, 14300 Nibong Tebal, Penang, Malaysia A. A. Hamidi School of Civil Engineering, University of Science Malaysia, 14300 Nibong Tebal, Penang, Malaysia M. H. Isa Civil Engineering Department, University of Technology PETRONAS, 31750 Tronoh, Perak, Malaysia M. A. Zahed Faculty of biological sciences, Kharazmi University, P.O.Box 15719-1491, Tehran, Iran 0000-0003-1175-1566 Journal Article 2018 01 01 Advanced Oxidation Processes (AOPs) have been employed to degrade biorefractory organic matters. This study investigates the combination of classical Fenton reaction with electrochemical oxidation, the electro-Fenton process, for the treatment of semi aerobic landfill leachate, collected from Pulau Burung Landfill Site (PBLS), Penang, Malaysia. The investigation has been carried out in batch reactors with aluminum electrodes to establish the optimal treatment conditions. The effects of applied current, pH, reaction time, electrodes separation distance, H₂O₂/Fe²⁺ molar ratio, and H₂O₂ and Fe²⁺ concentrations, significant process parameters by themselves, have also been investigated. According to the obtained results, electro-Fenton process is very efficient for the treatment of landfill leachate. Optimum oxidation efficiency has been achieved when neither H₂O₂ nor Fe²⁺ are overdosed, so that the maximum amount of OH radicals is available for the oxidation of organic compounds. The highest COD and color removals have been 92% and 93%, respectively; obtained at initial pH=3, H₂O₂/Fe²⁺molar ratio=1, applied current= 2A, treatment duration= 30 min, and electrodes separation distance= 3 cm. The current efficiency declines from 94% to 38% when the current rises from 0.5A to 2A. https://jpoll.ut.ac.ir/article_69021_763537898572ebe18671979a2e0ec89d.pdf