Optimization of H2O2/COD and Fe3+/H2O2 Ratios in Combined Electrocoagulation-Fenton System for Petrochemical Wastewater Treatment. CJTK [Internet]. 2026 Aug. 31 [cited 2026 Sep. 27];13(2):88-103. Available from: https://journal3.uad.ac.id/index.php/chemica/article/view/620