Akademik Veri Yönetim Sistemi
CHEMICAL ENGINEERING RESEARCH AND DESIGN, cilt.231, ss.115-130, 2026 (SCI-Expanded, Scopus)
Landfill leachate, containing complex and toxic inorganic and organic substances, requires efficient treatment prior to discharge into the receiving environment. This study investigates the first-time application of a novel Fe3O4/Co3O4/CuO-rGO catalyst for COD removal from real landfill leachate using an in-situ H2O2 generated-heterogeneous electro Fenton (HEF) process. The response surface methodology (RSM) was used to optimize the operating conditions. Optimum conditions were determined as pH of 3.7, applied current of 7.5 A, catalyst dose of 1.38 g/L, and reaction time of 107 min. Under these conditions, COD removal was 94.88%, with an energy consumption of 75.63 kWh/kg COD and an operating cost of $8.99. According to catalytic activity tests, COD removal was highest in the HEF process (95.05%), followed by the anodic oxidation-H2O2 process (53.48%), the anodic oxidation process (43.82%), and the adsorption process (20.11%). The dominant radical species responsible for COD removal was ·OH. The catalyst retained high activity after eight cycles, demonstrating good reusability. Fe3O4/Co3O4/CuO-rGO catalyst shows potential for practical, large-scale landfill leachate treatment.