Mineralization of stabilized landfill leachate by heterogeneous Fenton process with RSM optimization

ABSTRACT

Iron Molybdophospahate (FeMoPO) was used as a catalyst in heterogeneous Fenton process for the treatment of stabilized landfill leachate. COD removal efficiency of 84.9% and TOC removal of 71% was obtained with operating parameters of pH 2, H₂O₂ 9mM, and FeMoPO 1.75 g/L at 90 min. Biodegradability increase (0.03 to 0.38) and SUVA₂₅₄ value decrease indicated the breakdown of large organic matter. To optimize the Fenton process 4-factor 3-level Box-Behnken response surface design was adopted. Significant quadratic model was generated with R² of 0.9920. Predicted response for COD removal was 86.44%, which found to be in reasonable agreement with experimental result.

KEYWORDS:

• Stabilized landfill leachate
• iron Molybdophosphate
• heterogeneous Fenton process
• dissolved organic matter removal
• RSM Optimization