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<p>This study successfully demonstrated the development and systematic optimization of Mn NPs/Bentonite nanocomposites for the efficient photo-Fenton-like degradation of methyl orange. It was discovered that 5 weight percent manganese loading was optimal for the Mn nanoparticle nanocomposite. The characteristics of the nanocomposite has been studied using BET, FTIR, XRD, and SEM. The Taguchi statistical method has been applied to gate the MO dye degradation optimization parameters. Following a comprehensive investigation, the optimal synthesis and operational parameters were found to be manganese nanoparticles as the manganese source, MO dye initial concentration of 75&#xa0;mg/l, nanocomposite dosage of 0.5&#xa0;g/l, reaction pH of 7, H<sub>2</sub>O<sub>2</sub> volume of 150&#xa0;mM, light intensity of 30&#xa0;Watt, and reaction time of 90&#xa0;min. Under these conditions, a remarkable 90% degradation efficiency of Methyl Orange was achieved, highlighting the critical role that each parameter plays in influencing the catalyst's properties and overall performance. Because it eliminates the need for costly and chemically intensive pH adjustments that are occasionally required for other complex oxidation processes, its practical advantage of functioning best at a neutral pH is particularly noteworthy, boosting its sustainability and economic viability. The kinetic behavior of such photo-Fenton-like systems often exhibits pseudo-first-order kinetics, with degradation rate constants that change inversely with initial MO dye concentration and positively with catalyst dosage, H<sub>2</sub>O₂ concentration, and light intensity within optimal limits. The optimized Mn NPs/Bentonite nanocomposite shows tremendous potential as an effective, environmentally acceptable, and possibly cost-effective catalyst for advanced wastewater treatment, particularly the removal of recalcitrant colors.</p>

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Sustainable synthesis of novel Mn nanoparticles/bentonite nanocomposite for photo-Fenton-like degradation of methyl orange dye: optimization, kinetics

  • 期刊论文

  • 发表日期：

    2026年7月7日

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  • Mohammed Jaafar Ali Alatabe,
  • Mohammad Ghorbanpour,
  • Ali Farzi

摘要

This study successfully demonstrated the development and systematic optimization of Mn NPs/Bentonite nanocomposites for the efficient photo-Fenton-like degradation of methyl orange. It was discovered that 5 weight percent manganese loading was optimal for the Mn nanoparticle nanocomposite. The characteristics of the nanocomposite has been studied using BET, FTIR, XRD, and SEM. The Taguchi statistical method has been applied to gate the MO dye degradation optimization parameters. Following a comprehensive investigation, the optimal synthesis and operational parameters were found to be manganese nanoparticles as the manganese source, MO dye initial concentration of 75 mg/l, nanocomposite dosage of 0.5 g/l, reaction pH of 7, H2O2 volume of 150 mM, light intensity of 30 Watt, and reaction time of 90 min. Under these conditions, a remarkable 90% degradation efficiency of Methyl Orange was achieved, highlighting the critical role that each parameter plays in influencing the catalyst's properties and overall performance. Because it eliminates the need for costly and chemically intensive pH adjustments that are occasionally required for other complex oxidation processes, its practical advantage of functioning best at a neutral pH is particularly noteworthy, boosting its sustainability and economic viability. The kinetic behavior of such photo-Fenton-like systems often exhibits pseudo-first-order kinetics, with degradation rate constants that change inversely with initial MO dye concentration and positively with catalyst dosage, H2O₂ concentration, and light intensity within optimal limits. The optimized Mn NPs/Bentonite nanocomposite shows tremendous potential as an effective, environmentally acceptable, and possibly cost-effective catalyst for advanced wastewater treatment, particularly the removal of recalcitrant colors.