Abstract
A simple and fast method based on activated carbon@nanozerovalent iron–nickel (AC@nZVI/Ni) nanoadsorbent was developed for highly efficient removal of Reactive Orange 16 (RO16) from aqueous samples. AC@nZVI/Ni nanoadsorbent was characterized by FT-IR, XRD, SEM and EDX. Effects of diverse factors including the solution value, adsorption time, AC@nZVI/Ni dosage and initial RO16 concentration were explored via experimental design methodology, and the highest removal percentage of 100% was obtained under the optimal conditions. Langmuir and Freundlich models were employed to interpret the equilibrium adsorption data by utilizing different initial concentrations of RO16. The data are fitted to the Langmuir model, with a maximum adsorption capacity of 10.53 mg g−1 and a Langmuir constant of 13.51 L mg−1. The kinetic data were fitted to the pseudo-second-order model. Finally, thermodynamic study was accomplished at diverse temperatures and the data revealed an exothermic nature.
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The authors gratefully acknowledge the Islamic Azad University, North Tehran Branch, for providing facilities.
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Seyedi, M.S., Sohrabi, M.R., Motiee, F. et al. Synthesis and characterization of activated carbon@zerovalent iron–nickel nanoadsorbent for highly efficient removal of Reactive Orange 16 from aqueous sample: experimental design, kinetic, isotherm and thermodynamic studies. Res Chem Intermed 46, 1645–1662 (2020). https://doi.org/10.1007/s11164-019-04054-1
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DOI: https://doi.org/10.1007/s11164-019-04054-1