Green synthesis and characterization of magnetic gamma alumina nanoparticlesfor copper ions adsorption from synthetic wastewater

Green synthesis of magnetic gamma alumina nanoparticles (MGAl-NPs) for heavy metal adsorption: A novel approach for wastewater treatment. This study investigates the potential of magnetically modified gamma alumina nanoparticles (MGAl-NPs) for removing copper (II) ions from aqueous solutions. The synthesis of MGAl-NPs involves the mixture of aluminum hydroxide and magnetic iron oxide, resulting in a composite material with both magnetic and adsorptive properties. The adsorption capacity of MGAl-NPs was found to be 34.48 mg/g at optimal conditions of pH 5.0, initial concentration of 50 mg/L, and adsorbent dosage of 0.1 g.The adsorption kinetics followed the pseudo-second-order model, indicating that chemisorption was the dominant mechanism. The Langmuir isotherm model best described the adsorption data with an R² value of 0.995, suggesting that the adsorption occurred through monolayer coverage. The adsorption efficiency increased with decreasing pH, confirming that electrostatic attraction played a significant role in adsorption.Our findings demonstrate that the green synthesis of MGAl-NPs is an effective and eco-friendly method for removing heavy metals from wastewater. The magnetic properties of MGAl-NPs enable easy separation and recovery of the adsorbed heavy metals, making them a promising candidate for practical applications. This study provides valuable insights into developing sustainable adsorbents for water pollution remediation.