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Removal of Naproxen from Aqueous Solutions using Eco-Friendly Bio-Adsorbent Prepared from Orange Peels

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Abstract

The purpose of this work is to investigate the efficiency of orange peel (OP) in the removal of a pharmaceutical product (Naproxen) from aqueous solutions. Adsorption isotherms were determined experimentally. The results showed that orange peel has an appreciable affinity for Naproxen, with an elimination capacity of 45 mg/g and that the temperature has a very significant effect on the adsorption process. The obtained data were then tested by three models (Langmuir, Freundlich and Temkin) and the Langmuir model provided a good fit with the experimental values. A thermodynamic study proved that the adsorption process is physical, spontaneous and endothermic. In the adsorption kinetics study, the influence of certain parameters, such as pH and the initial concentration of the naproxen solution, was investigated by three models (pseudo-first-order, pseudo-second-order and Elovich kinetics). The results show that the kinetics decrease with the initial naproxen concentration, and that the first-order model describes the adsorption kinetics well.

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The author declare that the data supporting the finding of this study are available from the corresponding author upon reasonable request. Source data are provided with this paper.

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Acknowledgements

The authors received support from the National Engineering School of Gabes / ENIG- University of Gabes, Tunisia. Special thanks to Mr Karim Hamdy (Culture Bridge International, Corvallis, Oregon USA) for many helpful style corrections.

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Correspondence to Sami Guiza.

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Jmai, S., Jmai, L., Guiza, S. et al. Removal of Naproxen from Aqueous Solutions using Eco-Friendly Bio-Adsorbent Prepared from Orange Peels. Water Air Soil Pollut 235, 321 (2024). https://doi.org/10.1007/s11270-024-07101-9

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  • DOI: https://doi.org/10.1007/s11270-024-07101-9

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