Adsorption of Cr(VI) and phosphate anions by amino-functionalized palm oil fibers

Patrick Nkuigue Fotsing; Julien Vieillard; Nabil Bouazizi; Brahim Samir; Julie Cosme; Veronique Marquis; Franck Le Derf; Patrick Tsopbou Ngueagni; Vusumzi Pakade; Emmanuel Djoufac Woumfo; Guilherme Luiz Dotto; Glaydson Simões Dos Reis; Mohammad Rizwan Khan; Salim Manoharadas

doi:10.1007/s11356-024-35242-1

Adsorption of Cr(VI) and phosphate anions by amino-functionalized palm oil fibers

Environ Sci Pollut Res Int. 2024 Oct 8. doi: 10.1007/s11356-024-35242-1. Online ahead of print.

Authors

Patrick Nkuigue Fotsing^{1

2}, Julien Vieillard², Nabil Bouazizi^{2

3}, Brahim Samir², Julie Cosme², Veronique Marquis², Franck Le Derf², Patrick Tsopbou Ngueagni¹, Vusumzi Pakade⁴, Emmanuel Djoufac Woumfo¹, Guilherme Luiz Dotto^{5

6}, Glaydson Simões Dos Reis^{7

8}, Mohammad Rizwan Khan⁹, Salim Manoharadas¹⁰

Affiliations

¹ Department of Inorganic Chemistry, Faculty of Science, University of Yaounde I, PO Box 812, Yaounde, Cameroun.
² Normandie Université, UNIROUEN, INSA Rouen, CNRS, COBRA (UMR 6014), 27000, Evreux, France.
³ Normandie Univ, UNICAEN, ABTE EA 4651, Boulevard du Maréchal Juin, Bât Sciences 2, 14032, Caen Cedex, France.
⁴ Department of Chemistry, College of Science Engineering and Technology, University of South Africa, Florida Science Campus, Johannesburg, South Africa.
⁵ Normandie Université, UNIROUEN, INSA Rouen, CNRS, COBRA (UMR 6014), 27000, Evreux, France. [email protected].
⁶ Research Group On Adsorptive and Catalytic Process Engineering, Federal University of Santa Maria, Av. Roraima, 1000-7, Santa Maria, RS, 97105-900, Brazil. [email protected].
⁷ Biomass Technology Centre, Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, SE-90183, Umeå, Sweden.
⁸ Laboratory of Industrial Chemistry and Reaction Engineering, Faculty of Science and Engineering, Åbo Akademi University, 20500, Åbo/Turku, Finland.
⁹ Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
¹⁰ Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.

PMID: 39379653
DOI: 10.1007/s11356-024-35242-1

Abstract

This work developed a novel sustainable adsorbent (PF-Aq) prepared by the amino-functionalization of palm oil fibers (PF). XPS, SEM/EDS, TGA/DSC, and FT-IR techniques proved the successful functionalization of the PF with the amino group. The PF-Aq adsorbent presents a high adsorption capacity for phosphate and Cr(VI) ions. Adsorption kinetics of the ions onto the PF-Aq followed the general-order models, with 240- and 300-min equilibrium times for phosphate and Cr(VI), respectively. The Freundlich equilibrium model can explain the adsorption of phosphate and Cr(VI) on the PF-Aq. Besides, the maximum adsorption capacities were 151.07 mg g^-1 for phosphate and 206.08 mg g^-1 for Cr(VI). The best pH for the adsorption of both ions on PF-Aq was 4.0. Interestingly, adsorption was exothermic for phosphate and endothermic for Cr(VI). The adsorption capacities were reduced by 16% for phosphate and 10% for Cr(VI) after 5 adsorption-desorption cycles, demonstrating the good recyclability of the PF-Aq. It can be concluded that PF-Aq is a relevant adsorbent to uptake phosphate and Cr(VI) from water due to its high adsorption capacity, low cost, recyclability, availability, and fast kinetics. Finally, the excellent adsorption potential results from inserting amino groups in the PF, allowing electrostatic interactions between adsorbent and adsorbate.

Keywords: Amino-functionalized adsorbent; Covalent grafting; Freundlich model; Recyclability; Sustainability.