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Synthesis and characterization of γ-MnO2/chitosan/Fe3O4 cross-linked with EDTA and the study of its efficiency for the elimination of zinc(II) and lead(II) from wastewater

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Abstract

In this research, a novel γ-MnO2/chitosan/Fe3O4 nanocomposite was synthesized and modified by ethylenediaminetetraacetic acid (EDTA) for the separation and simultaneous elimination of Zn(II) and Pb(II) ions from aqueous solutions in a batch system. The magnetic nanocomposite was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, and elemental analysis (EDAX). The results demonstrated that the magnetic nanocomposite was successfully synthesized and cross-linked. The predominant influential experimental parameters including pH, contact time, initial concentration, and temperature were analyzed in relation to the adsorption capacity. The experimental data were well converged with the double exponential kinetic model. Also, the results were well matched with the Langmuir isotherm, where the maximum adsorption values were 310.4 and 136 mg g−1 for Pb(II) and Zn(II), respectively. On the other hand, in the binary-component system, the Langmuir–Freundlich model dominated the experimental data. The thermodynamic results (ΔG° < 0, ΔH° > 0, and ΔS° > 0) within the temperature range of 25–40 °C showed that the nature of adsorption by the nanocomposite for both ions was spontaneous and endothermic and was favored at higher temperatures. The simultaneous removal of two ions, the excellent magnetic separation, and the high efficiency in reuse (five effective recovery cycles) indicated the high capability of the EDTA-modified γ-MnO2/chitosan/Fe3O4 nanocomposite in the treatment of industrial effluents from Pb(II) and Zn(II).

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This work was performed under the supervision of A. Parvareh and M. K. Moraveji. All authors contributed to the study conception and design the work. Material preparation, data acquisition, and analyses were performed by A. Panahandeh. Moreover, he was a major contributor in writing the first draft of the manuscript. A. Parvareh and M. K. Moraveji commented on previous versions of the manuscript. The final manuscript was read and approved by all authors. A draft version of the revised manuscript was performed by A. Panahandeh based on the reviewer’s comments. Final corrections on the revised manuscript as well as “answer to reviewers” was adjusted by A. Parvareh.

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Correspondence to Arsalan Parvareh.

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Responsible Editor: Tito Roberto Cadaval Jr

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Panahandeh, A., Parvareh, A. & Moraveji, M.K. Synthesis and characterization of γ-MnO2/chitosan/Fe3O4 cross-linked with EDTA and the study of its efficiency for the elimination of zinc(II) and lead(II) from wastewater. Environ Sci Pollut Res 28, 9235–9254 (2021). https://doi.org/10.1007/s11356-020-11359-x

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  • DOI: https://doi.org/10.1007/s11356-020-11359-x

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