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Vol. 34 No. 4 (2022): Vol 34 Issue 4, 2022

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Synthesis of Novel Ionic Liquid Modified AC-Fe3O4 Magnetic Nanocomposite for the Adsorption of Heavy Metals in Wastewater

https://doi.org/10.14233/ajchem.2022.23547
R.T. Taziwa
Department of Applied Chemistry, Walter Sisulu University, Old King Williams Road, Fort Jackson, East London, South Africa
H. Mungondori
Department of Applied Chemistry, Walter Sisulu University, Old King Williams Road, Fort Jackson, East London, South Africa
Takunda Zarima
Department of Applied Chemistry, Walter Sisulu University, Old King Williams Road, Fort Jackson, East London, South Africa

Corresponding Author(s) : H. Mungondori

henrymungondori@gmail.com

Asian Journal of Chemistry, Vol. 34 No. 4 (2022): Vol 34 Issue 4, 2022

Abstract

This study reports a novel magnetic nanoadsorbent prepared from magnetite (Fe3O4) as the magnetic core, activated carbon from coal fly ash and an ionic liquid (1-methyl-3-ethylimidazolium chloride). The magnetic nanoadsorbent was synthesized via co-precipitation and characterized by FTIR, XRD, TEM, EDS and BET surface area analysis. Batch adsorption studies on cadmium (Cd2+) and lead (Pb2+) solutions such as effect of pH, contact time and adsorbent dosage were carried out. The data was analyzed using the Langmuir and Freundlich models. The results revealed that the optimal adsorption conditions for both metal ions on synthesized nanoadsorbent were pH 6, 200 min, adsorbent dosage of 1.5 g/L, initial ion concentration of 10 ppm and a temperature of 25 ºC. The data obtained in the adsorption of Cd2+ and Pb2+ best fitted the Freundlich isotherm, with R2 values of 0.998 and 0.995, respectively. Thermodynamic and kinetic studies suggested that adsorption of both metal ions on the IL-AC-Fe3O4 nanocomposite followed the pseudo first order model. The synthesised nanoadsorbent (IL-AC-Fe3O4) exhibits good adsorption properties and has great potential in a water treatment technology.

Keywords

Adsorption Heavy metals Lead Cadmium Nanoadsorbent Wastewater
Taziwa, R., Mungondori, H., & Zarima, T. (2022). Synthesis of Novel Ionic Liquid Modified AC-Fe3O4 Magnetic Nanocomposite for the Adsorption of Heavy Metals in Wastewater. Asian Journal of Chemistry, 34(4), 995–1002. https://doi.org/10.14233/ajchem.2022.23547
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