Abstract
A facile, feasible, and green synthesis via an electrochemical exfoliation process was applied to synthesize nitrogen-doped MgO/graphene nanocomposite (N-MgO/G). The N-MgO/G nanocomposite was characterized by several analytical techniques including X-ray photoelectron spectroscopy, X-ray powder diffraction, transmission electron microscopy, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, selected area electron diffraction, and elemental mapping analysis. N-MgO/G nanocomposite was then applied to adsorb lead metal ions (Pb2+) from aqueous solutions. The N-MgO/G nanocomposite demonstrated a remarkably high Langmuir maximum adsorption capacity (294.12 mg/g) for Pb2+ ions under the optimum experimental conditions at a pH of 5.13, time of 35 min, dose of 0.025 g, the concentration of 400 mg/L, and a temperature of 36 °C. Adsorption kinetics results fitted with a pseudo-second-order model and a thermodynamic study showed that Pb2+ adsorption is an endothermic process. The practical application of N-MgO/G was also investigated to test its applicability in real water samples collected from different sources such as deionized water, tap water, wastewater, and river water.
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The authors extend their appreciation to the DSR at Majmaah University.
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The authors extend their appreciation to the Deanship of Scientific Research (DSR) at Majmaah University for funding this work under project No (RGP-2019-14).
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DZH did the experiments, MKU analyzed the data and wrote the paper, OA performed the characterization and wrote this part, and SSA joined the team.
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Husein, D.Z., Uddin, M.K., Ansari, M.O. et al. Green synthesis, characterization, application and functionality of nitrogen-doped MgO/graphene nanocomposite. Environ Sci Pollut Res 28, 28014–28023 (2021). https://doi.org/10.1007/s11356-021-12628-z
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DOI: https://doi.org/10.1007/s11356-021-12628-z