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To produce quality textile products, many stable sy nthetic dyes are invented. However, textile wastewater discharged into the environment contains a large amount of dyes which are bio-recalcitrants and stable to heat and solar radi ation. These toxic contaminants impact negatively the environment for a long time and pois on plants, animals, and human. In this study, Heterogeneous Electro Fenton process with Fe 3O4-Mn3O4 as a catalyst was used for textile wastewater treatment. Graphite electrodes were chos en f r their stability and good conductivity. Three operating factors greatly affected the remova l efficiency are current density, pH and catalyst dosage. Response surface methodology was a pplied to find empirical mathematical models for these factors, then find an accordant op erating condition for treatment which provides high removal efficiency and low operating cost. Investigated ranges scaled in previous studies were: current density (10 – 20 mA/cm ), pH (3 – 5), and catalyst dosage (0.5 – 1.5 g/l). At current density of 17.03 mA/cm , pH of 3.77, catalyst dosage of 1.17 g/l, the trea tm nt reached its optimum condition, COD and Color remova l efficiencies were 93.3 % and 99.2 %, respectively, where COD and Color values in the eff lu nt are 56 mg/l and 16 Pt-Co.

HETEROGENEOUS ELECTRO FENTON PROCESS FOR TEXTILE WASTEWATER TREATMENT: APPLICATION OF Fe3O4-Mn3O4 AS A CATALYST