Document Type : Research Article
Authors
1
Department of Environmental Science, Qeshm branch, Islamic Azad university, Qeshm, Iran
2
Department of Environmental Science, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran.
3
Department of Environmental Science, Faculty of Natural Resources, Bandar Abbas Branch, Islamic Azad University, Bandar Abbas, Iran
4
Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran
10.30492/ijcce.2024.2010710.6201
Abstract
The study focused on synthesizing a novel nanocomposite adsorbent by modifying magnetic graphene oxide (mGO) polymerized with a 5-AIPA group (mGO-AIPA) using a simplified co-precipitation method. The morphological and structural characteristics of the synthesized nanoparticles were evaluated through the utilization of Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Vibrating sample magnetometer (VSM) and Thermogravimetric analysis (TGA). The composite response surface methodology (RSM) was employed to examine the impact of diverse factors such as the pH of the solution, adsorbent dosage, contact time and the initial concentration of Cd (II) and Pb (II) ions. The design of experiments and modeling were validated through ANOVA analysis. The results revealed that the maximum adsorption capacities of Cd (II) and Pb (II) ions at a pH of 6.5 were 120.51 mg/g and 198.79 mg/g, respectively. Furthermore, the adsorption of Pb (II) and Cd (II) ions by the magnetic graphene oxide composite showed strong correlation coefficients (R2) of 97% and 95% for the Freundlich isotherm model and 99% for the pseudo-second-order kinetics model. As per the thermodynamic analysis, it was deduced that the process of adsorption of Cd (II) and Pb (II) is both spontaneous and endothermic. In conclusion, the study demonstrated that magnetic graphene oxide functionalized with organic polymers is an efficient technique for effectively eliminating heavy metal pollutants, especially cadmium and lead, from aqueous solutions.
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