Dépôt numérique

Borassus aethiopum activated carbon prepared for nitrate ions removal.

Koné, Horo; Assémian, Alain Stéphane ORCID logoORCID: https://orcid.org/0000-0001-7755-9775; Tiho, Tagouèlbè; Adouby, Kopoin; Yao, Benjamin Kouassi et Drogui, Patrick ORCID logoORCID: https://orcid.org/0000-0002-3802-2729 (2022). Borassus aethiopum activated carbon prepared for nitrate ions removal. Journal of Applied Water Engineering and Research , vol. 10 , nº 1. pp. 64-77. DOI: 10.1080/23249676.2021.1947400.

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This work aims to study nitrate ions removal using Borassus aethiopum activated carbon (BA-AC) in a synthetic medium. BA-AC was prepared through artisanal method in order to provide a low-cost activated carbon. Physico-chemical characterization of BA-AC has shown a high-specific surface area (1431 m2/g). Analysis of surface morphology by scanning electron microscopy, mean pore diameter (2.76 nm) and adsorption/desorption isotherm resulted in the mesoporous adsorbent. The existence of functional groups (C = O; C–H; C–OH) was highlighted by Fourier Transform Infrared spectroscopy. A percentage of 60.56% for nitrate ions at pH 4 was reached. Pseudo-second-order kinetic and Langmuir isotherm were the most suitable models to describe adsorption process. The thermodynamic study revealed that adsorption mechanism occurs spontaneously (ΔG° << 0). Enthalpy (ΔH° = 1.89 kJ.mol−1) and entropy (ΔS° = 19.03 J.mol−1K−1) values indicate an endothermic process with an increase of disorder at the solid–liquid interface.

Type de document: Article
Mots-clés libres: Nitrate ions; Borassus aethiopum; activated carbon; adsorption
Centre: Centre Eau Terre Environnement
Date de dépôt: 09 juill. 2024 15:48
Dernière modification: 09 juill. 2024 15:48
URI: https://espace.inrs.ca/id/eprint/15349

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