Activated FeCl3-hydrochar/DWTS as a high-performance catalyst in the photo-Fenton process for wastewater treatment
摘要
This study investigates the use of a FeCl3-hydrochar/drinking water treatment sludge (FeCl3-HC/DWTS) catalyst as a catalyst for industrial wastewater treatment through the photo-Fenton process. The catalyst was synthesized by activating hydroxide sludge from a drinking water treatment plant and FeCl3-hydrochar derived from two-phase olive mill waste via hydrothermal carbonization. The structural and chemical properties of the catalyst were characterized using XRD, SEM, EDS, ICP, and FT-IR analyses. The composite demonstrated excellent catalytic performance in the degradation of micropollutants, achieving 95% decolorization of Methyl Orange in 30 min, 91% degradation of paracetamol, and 88% degradation of salicylic acid in 200 min, using 2.5 g/L of catalyst, [H2O2] = 14,68 mM, and pH = 5. It maintained 88% decolorization efficiency for Methyl Orange over five successive cycles, highlighting its reusability and stability. For real industrial effluents, the catalyst achieved 98% decolorization of textile wastewater within 150 min using 4.5 g of catalyst. These results indicate that the FeCl3-HC/DWTS catalyst can be effectively used for the treatment of industrial wastewater, contributing to more sustainable wastewater management practices by minimizing sludge waste and enhancing the degradation of recalcitrant pollutants.