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Separation Science and Technology Volume 56, 2021 - Issue 8
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Adsorption

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]
ORCID Iconhttps://orcid.org/0000-0003-3417-8440
ORCID Icon
Pages 1328-1341 | Received 30 Nov 2019, Accepted 01 Jun 2020, Published online: 23 Jun 2020
 
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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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