Synthesis of CaO/Fe2O3 nanocomposite as an efficient nanoadsorbent for the treatment of wastewater containing Cr (III)

Maryam Keshavarza Department of Chemical Engineering, Bushehr Branch, Islamic Azad University, Bushehr, Iran

Rauf Foroutanb Faculty of Chemical and Petroleum Engineering, University of Tabriz, Tabriz, Iran

Fatemeh Paparic Young Researchers and Elite Club, Bushehr Branch, Islamic Azad University, Bushehr, Iran

Laura Bulgariud Department of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection “Cristofor Simionescu”, “Cristofor Simionescu” Faculty of Technical University Gheorghe Asachi of Iasi, Iaşi, Romania

Hossein Esmaeilia Department of Chemical Engineering, Bushehr Branch, Islamic Azad University, Bushehr, IranCorrespondence[email protected]

https://orcid.org/0000-0003-3417-8440

ABSTRACT

In this study, CaO/Fe₂O₃ nanocomposite was studied as an efficient and novel adsorbent for the sorption of chromium (III) from aqueous media. Different analyses including FTIR, XRD, TGA-DTG, SEM/EDAX, and TEM were used to study the characteristics of CaO/Fe₂O₃ nanocomposite. The highest sorption efficiency using CaO/Fe₂O₃ nanocomposite was achieved 97.53%, which showed a high removal efficiency of Cr (III). The maximum adsorption capacity of CaO/Fe₂O₃ nanocomposite using Langmuir isotherm model was obtained 60.60 mg/g. Also, the adsorption data were best fitted to the pseudo-second-order kinetic model and Langmuir isotherm model. Moreover, the adsorption process was spontaneous and exothermic nature.

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Synthesis of CaO/Fe2O3 nanocomposite as an efficient nanoadsorbent for the treatment of wastewater containing Cr (III)

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Synthesis of CaO/Fe2O3 nanocomposite as an efficient nanoadsorbent for the treatment of wastewater containing Cr (III)

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