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The adsorption performance of manganese oxide-coated zeolite (MOCZ) and iron oxide-coated zeolite (FOCZ) for the removal of Fe and Mn from aqueous solutions was evaluated. Response Surface Methodology (RSM) based on the Box-Behnken design was used to assess the effect of independent variables on the response function and prediction of the best response value. Analysis of variance (ANOVA) was used to analyze the responses. MOCZ and FOCZ were characterized by scanning electron microscopy (SEM) and X-Ray Diffraction (XRD) techniques. The effect of parameters such as pH, time, and concentration was studied at different values. Under the optimized conditions (pH 8, contact time 120 min, initial concentration 3 mg/L), MOCZ achieved 96.1% Mn and 92.5% Fe removal. While FOCZ reached 88.5% Mn and 75.9% Fe removal, confirming the superior performance of MOCZ. The experimental data for the variables showed high correlations, with coefficient of determination (R2 ) values of 0.93 and 0.90 for Mn and 0.92 and 0.45 for Fe. These results indicate that MOCZ is a more effective adsorbent for Fe and Mn removal compared to FOCZ under the evaluated conditions

Keywords: Adsorption, FOCZ, Fe and Mn, MOCZ, Response Surface Methodology

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