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Effective adsorption of zinc on magnetic nanocomposite of Fe3O4/zeolite/cellulose nanofibers: kinetic, equilibrium, and thermodynamic study

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Abstract

In this paper, the adsorption behavior of zinc onto magnetic zeolite/cellulose nanofibers (MZNF) was studied. The prepared adsorbent was characterized by SEM, FTIR, and VSM analyses. The mass ratio of adsorbent in composite, pH, contact time, adsorbent dosage, initial Zn+2 concentration, temperature, and agitation speed were investigated in batch experiments. The results showed that zeolite played an important role in the prepared nanocomposite due to its great surface area. pH 7 exhibited the highest Zn+2 removal efficiency. Rapid adsorption at the first 30 min of the reaction is one of the advantages of the prepared adsorbents. Moreover, increase at temperature led to higher efficiency and maximum efficiency was attained at 30 °C. Under optimum conditions, MZNF showed removal efficiency of 96% and maximum adsorption capacity of 9.45 mg/g. The presence of the competing ions did not reduce the efficiency of the process and adsorption efficiency was higher than 93%. The calculated RSD of 1.42% exhibits the suitability of the process. Equilibrium data were examined by various isotherms and kinetics equations. It was concluded that Pseudo second-order model and Langmuir models described the adsorption process well. Based on these results, MZNF obtained in this work can be served as a promising candidate for Zn+2 removal in wastewater.

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Acknowledgments

The authors also would like to extend the acknowledgments to Islamic Azad University, Yadegar-e-Imam Khomeini (RAH) Share Rey, and West Tehran Branches.

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Correspondence to Ramin M.A.Tehrani.

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Responsible editor: Tito Roberto Cadaval Jr

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Mirjavadi, E.S., M.A.Tehrani, R. & Khadir, A. Effective adsorption of zinc on magnetic nanocomposite of Fe3O4/zeolite/cellulose nanofibers: kinetic, equilibrium, and thermodynamic study. Environ Sci Pollut Res 26, 33478–33493 (2019). https://doi.org/10.1007/s11356-019-06165-z

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  • DOI: https://doi.org/10.1007/s11356-019-06165-z

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