| Titre : | Preparation, chemical activation, and characterization of palm rachis biomass as a sustainable adsorbent for the removal of methylene blue from water |
| Auteurs : | Lyna Tas, Auteur ; Yacine Kerchich, Directeur de thèse |
| Type de document : | document électronique |
| Editeur : | [S.l.] : [s.n.], 2026 |
| Format : | 1 fichier PDF (3.2 Mo) |
| Note générale : |
Mode d'accès : accès au texte intégral par intranet. Mémoire de Projet de Fin d’Études : Génie des Procédés et de l'Environnement : Alger, École Nationale Polytechnique : 2026 Bibliogr. p. 134-137. - Annexes |
| Langues : | Anglais |
| Index. décimale : | PE01126 |
| Tags : | Palm rachis Methylene blue Biosorption Chemical activation Adsorption kinetics Freundlich isotherm |
| Résumé : |
This study investigated the removal of methylene blue from aqueous solution using palm rachis biomass as a low-cost biosorbent. Raw biomass was chemically activated using acid and alkaline treatments, and the adsorption performance of the resulting materials was evaluated under different operating conditions. The influence of contact time, adsorbent dosage, initial dye concentration, particle size, and solution pH was examined in order to identify the most efficient adsorbent and the main factors controlling the adsorption process. The results showed that chemical activation significantly improved adsorption performance, with the alkaline-activated palm rachis with a particle size of 250–315 μm exhibiting the highest removal efficiency and adsorption capacity. Kinetic analysis revealed that the adsorption process was best described by the pseudo-second-order model, while intraparticle diffusion contributed to the overall mechanism without being the sole rate-limiting step. Equilibrium data were better fitted by the Freundlich isotherm than by the Langmuir model, indicating adsorption on a heterogeneous surface. The pHpzc value was found to be approximately 7.8, confirming the important role of electrostatic attraction in methylene blue uptake. Overall, the study demonstrates that palm rachis can be valorized as an efficient and sustainable biosorbent for dye removal from wastewater. |
Exemplaires (1)
| Code-barres | Cote | Support | Localisation | Section | Disponibilité | Spécialité | Etat_Exemplaire | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| EP01119 | PE01126 | Ressources électroniques | Bibliothèque centrale | Projet Fin d'Etudes | Disponible | Génie_procédés_environnement | Téléchargeable |
