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Membrane Water Treatment Volume 15, Number 2, July 2024 , pages 89-98 DOI: https://doi.org/10.12989/mwt.2024.15.2.089 |
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Evaluation of Pb (II) and Cd (II) biosorption from aqueous solution by Ziziphus lotus stem powder (ZLSP) |
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Nosair El Yakoubi, Mounia Ennami, Naouar Ben Ali, Zineb Nejjar El Ansari, Mohammed L'bachir EL KBIACH1, Loubna Bounab and Brahim El Bouzdoudi
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| Abstract | ||
| The ability of Zizyphus lotus stem powder (ZLSP) to remove Pb (II) and Cd (II) ions from an aqueous solution was evaluated. The present phenomenon of biosorption was revealed to depend on pH, biosorbent dosage, temperature, initial ionic concentration, time of contact and biosorbent's particle size. The sorption process was exothermic (∆H°<0), and showing a strong Pb(II)/Cd(II)-ZLSP affinity (∆S°>0). Gibbs free energy data (∆G°<0, and decreases as temperature increase) reveals that the process studied is characterized by its feasibility and spontaneous nature. The best fits of the equilibrium data were obtained by the Temkin model and the Langmuir model. The maximum Pb(II)/Cd(II)-ZLSP biosorption capacities were 33.02 mg/g for Pb (II) and 20.73 mg/g for Cd (II). The pseudo-second order model was the most appropriate for fitting the kinetic data. The characterization of the biochemical groups essentially involved in the sorption phenomenon was made possible by FTIR spectral analysis. The capacity of ZLSP as an effective and ecofriendly biosorbent is confirmed through this study. | ||
| Key Words | ||
| biosorption; isotherm; kinetic; thermodynamic; Ziziphus lotus | ||
| Address | ||
| Nosair El Yakoubi, Naouar Ben Ali, Mohammed L'bachir EL KBIACH and Brahim El Bouzdoudi: Plant Biotechnology Team, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco Mounia Ennami: Agronomic and Veterinary Institute Hassan II (IAV), Production, Protection and Plant Biotechnology Department, Rabat, Morocco Zineb Nejjar El Ansari: Plant Biotechnology Team, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco/ Life and Health Sciences Team, Faculty of Medicine and Pharmacy, Abdelmalek Essaadi University, Tétouan, Morocco Loubna Bounab: Advanced Materials, Structures and Civil Engineering Team, ENSA Tetouan, Abdelmalek Essaadi University, Tetouan, Morocco | ||
