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

Abstract

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.