حذف مواد آلي از پساب با تثبيت آهن روي آلفا آلومينا

Water pollution caused by the discharge of industrial wastewater containing persistent organic compounds, particularly PHenolic compounds, has become one of the major environmental challenges in recent decades. PHenol an‎d resorcinol are difficult to remove by conventional treatment methods due to their stable aromatic structure, high toxicity, an‎d resistance to biodegradation. Therefore, the development of efficient an‎d sustainable methods for the removal of these compounds from industrial wastewater is essential. In this study, a heterogeneous catalytic system based on α-alumina supported with iron, copper, an‎d magnesium was developed for the removal of PHenol an‎d resorcinol from aqueous media. To achieve optimal operating conditions, the effects of various parameters including PH, thermal treatment temperature, drying time, pollutant concentration, reaction time, an‎d hydrogen peroxide concentration were systematically investigated. In addition, the role of each metal an‎d their synergistic effects in mono-metallic an‎d multi-metallic catalytic systems were eva‎luated. The performance of the catalysts was assessed using UV–Vis spectroPHotometry by monitoring the reduction of PHenol an‎d resorcinol concentrations in synthetic solutions. To enhance catalyst stability, sodium silicate was employed as a stabilizing agent, an‎d the chemical stability of the catalyst was eva‎luated through washing, recycling tests, an‎d atomic absorption analysis. Furthermore, the reusability of the catalyst was investigated over several consecutive cycles. Subsequently, the performance of the optimized catalyst was examined in the treatment of real wastewater obtained from a pulp an‎d paper mill, an‎d the reduction of chemical oxygen deman‎d (COD) was used as an indicator of treatment efficiency.The results demonstrated that the stabilized multi-metallic catalytic system supported on α-alumina exhibited high efficiency in the removal of PHenol an‎d resorcinol an‎d maintained good stability during repeated use. These findings indicate that the proposed catalytic system has strong potential as an effective an‎d practical option for the treatment of industrial wastewater containing persistent organic compounds.

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