Kinetic and equilibrium study of graphene and copper oxides modified nanocomposites for metal ions adsorption from binary metal aqueous solution

Ali, AH, Kareem, AB, Al-Rawi, UA, Khalid, U, Zhang, S, Zafar, F, Papraćanin, E, Hatshan, MR and Sher, F ORCID: https://orcid.org/0000-0003-2890-5912, 2023. Kinetic and equilibrium study of graphene and copper oxides modified nanocomposites for metal ions adsorption from binary metal aqueous solution. Frontiers in Chemistry, 11: 1279948. ISSN 2296-2646

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Abstract

Presently, the main cause of pollution of natural water resources is heavy metal ions. The removal of metal ions such as nickel (Ni2+) and cadmium (Cd2+) has been given considerable attention due to their health and environmental risks. In this regard, for wastewater treatment containing heavy metal ions, graphene oxide (GO) nanocomposites with metal oxide nanoparticles (NPs) attained significant importance. In this study, graphene oxide stacked with copper oxide nanocomposites (GO/CuO-NCs) were synthesized and characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and atomic force microscopy (AFM) analytical procedures. The prepared GO/CuO-NCs were applied for the removal of Ni2+ and Cd2+ ions from a binary metal ion system in batch and continuous experiments. The obtained results revealed that GO/CuO-NCs exhibited the highest removal efficiencies of Ni2+ (89.60% ± 2.12%) and Cd2+ (97.10% ± 1.91%) at the optimum values of pH: 8, dose: 0.25 g, contact time: 60 min, and at 50 ppm initial metal ion concentration in a batch study. However, 4 mL/min flow rate, 50 ppm initial concentration, and 2 cm bed height were proved to be the suitable conditions for metal ion adsorption in the column study. The kinetic adsorption data exhibited the best fitting with the pseudo-second-order model. The adsorption isotherm provided the best-fitting data in the Langmuir isotherm model. This study suggested that the GO/CuO nanocomposites have proved to be efficient adsorbents for Ni2+ and Cd2+ ions from a binary metal system.

Item Type:	Journal article
Publication Title:	Frontiers in Chemistry
Creators:	Ali, A.H., Kareem, A.B., Al-Rawi, U.A., Khalid, U., Zhang, S., Zafar, F., Papraćanin, E., Hatshan, M.R. and Sher, F.
Publisher:	Frontiers Media SA
Date:	2023
Volume:	11
ISSN:	2296-2646
Identifiers:	Number Type 10.3389/fchem.2023.1279948 DOI 2556600 Other
Rights:	© 2023 Ali, Kareem, Al-Rawi, Khalid, Zhang, Zafar, Papraćanin, Hatshan and Sher. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) (http://creativecommons.org/licenses/by/4.0/). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Divisions:	Schools > School of Science and Technology
Record created by:	Laura Borcherds
Date Added:	16 Jan 2026 12:00
Last Modified:	16 Jan 2026 12:00
URI:	https://irep.ntu.ac.uk/id/eprint/55068

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