Contribution to the removal of pharmaceutical pollutants by adsorption on a local biomaterial / Samira Chebba

Public ISBD Titre : Contribution to the removal of pharmaceutical pollutants by adsorption on a local biomaterial Type de document : document multimédia Auteurs : Samira Chebba, Auteur ; Asma Boudaoud, Directeur de thèse ; Mebrouk Djedid, Directeur de thèse Editeur : Laghouat : Université Amar Telidji - Département de génie des procédés Année de publication : 2025 Importance : 133 p. Accompagnement : 1 disque optique numérique (CD-ROM) Note générale : Option : Environmental process engineering Langues : Anglais Mots-clés : Adsorption  Characterizations  Kinetics  Isotherms  Thermodynamic magnetic nanocomposite  Pharmaceutical pollutants Résumé : This work involved the development and evaluation of a novel adsorbent based on Phragmites australis stems (Ph-Stems), transformed by chemical treatment into a magnetic nanocomposite (Ph- Stems/Fe₃O₄-MgO). These two materials were used for the adsorption of three widely used pharmaceutical dyes: malachite green (MG), methylene blue (MB) and potassium permanganate (KMnO₄). Characterizations by SEM, EDX, FTIR, BET and XRD confirmed the successful anchoring of magnetic nanoparticles on Ph-Stems, revealing a cubic spinel structure and improved specific surface area (from 4.50 to 8.88 m²/g). Kinetic studies showed that the pseudo-second-order model best describes the adsorption process, while the Langmuir and Freundlich isotherms fit the experimental data well. Maximum adsorption capacities increased significantly with nanocomposite, reaching up to 104.71 mg/g for MG, 50.32 mg/g for MB, and 230.84 mg/g for KMnO₄, compared with 33.82 mg/g, 27.77 mg/g and 54.36 mg/g respectively for crude Ph-Stems. These results confirm that magnetic nanocomposite is an effective and promising solution for the remediation of water containing pharmaceutical contaminants. note de thèses : Thèse de doctorat en génie de procédés Contribution to the removal of pharmaceutical pollutants by adsorption on a local biomaterial [document multimédia] / Samira Chebba, Auteur ; Asma Boudaoud, Directeur de thèse ; Mebrouk Djedid, Directeur de thèse . - Laghouat : Université Amar Telidji - Département de génie des procédés, 2025 . - 133 p. + 1 disque optique numérique (CD-ROM). Option : Environmental process engineering Langues : Anglais Mots-clés : Adsorption  Characterizations  Kinetics  Isotherms  Thermodynamic magnetic nanocomposite  Pharmaceutical pollutants Résumé : This work involved the development and evaluation of a novel adsorbent based on Phragmites australis stems (Ph-Stems), transformed by chemical treatment into a magnetic nanocomposite (Ph- Stems/Fe₃O₄-MgO). These two materials were used for the adsorption of three widely used pharmaceutical dyes: malachite green (MG), methylene blue (MB) and potassium permanganate (KMnO₄). Characterizations by SEM, EDX, FTIR, BET and XRD confirmed the successful anchoring of magnetic nanoparticles on Ph-Stems, revealing a cubic spinel structure and improved specific surface area (from 4.50 to 8.88 m²/g). Kinetic studies showed that the pseudo-second-order model best describes the adsorption process, while the Langmuir and Freundlich isotherms fit the experimental data well. Maximum adsorption capacities increased significantly with nanocomposite, reaching up to 104.71 mg/g for MG, 50.32 mg/g for MB, and 230.84 mg/g for KMnO₄, compared with 33.82 mg/g, 27.77 mg/g and 54.36 mg/g respectively for crude Ph-Stems. These results confirm that magnetic nanocomposite is an effective and promising solution for the remediation of water containing pharmaceutical contaminants. note de thèses : Thèse de doctorat en génie de procédés

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