Accéder directement au contenu Accéder directement à la navigation
Nouvelle interface
Article dans une revue

Phosphorylation of Guar Gum/Magnetite/Chitosan Nanocomposites for Uranium (VI) Sorption and Antibacterial Applications

Abstract : The development of new materials is needed to address the environmental challenges of wastewater treatment. The phosphorylation of guar gum combined with its association to chitosan allows preparing an efficient sorbent for the removal of U(VI) from slightly acidic solutions. The incorporation of magnetite nanoparticles enhances solid/liquid. Functional groups are characterized by FTIR spectroscopy while textural properties are qualified by N2 adsorption. The optimum pH is close to 4 (deprotonation of amine and phosphonate groups). Uptake kinetics are fast (60 min of contact), fitted by a pseudo-first order rate equation. Maximum sorption capacities are close to 1.28 and 1.16 mmol U g−1 (non-magnetic and magnetic, respectively), while the sorption isotherms are fitted by Langmuir equation. Uranyl desorption (using 0.2 M HCl solutions) is achieved within 20–30 min; the sorbents can be recycled for at least five cycles (5–6% loss in sorption performance, complete desorption). In multi-component solutions, the sorbents show marked preference for U(VI) and Nd(III) over alkali-earth metals and Si(IV). The zone of exclusion method shows that magnetic sorbent has antibacterial effects against both Gram+ and Gram- bacteria, contrary to non-magnetic material (only Gram+ bacteria). The magnetic composite is highly promising as antimicrobial support and for recovery of valuable metals.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal.mines-ales.fr/hal-03190711
Contributeur : Administrateur IMT - Mines Alès Connectez-vous pour contacter le contributeur
Soumis le : mardi 6 avril 2021 - 15:03:32
Dernière modification le : mercredi 20 octobre 2021 - 01:23:05
Archivage à long terme le : : mercredi 7 juillet 2021 - 18:43:47

Fichier

molecules-26-01920-v2.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

Citation

Mohammed F Hamza, Amr Fouda, Khalid Z Elwakeel, Yuezhou Wei, Eric Guibal, et al.. Phosphorylation of Guar Gum/Magnetite/Chitosan Nanocomposites for Uranium (VI) Sorption and Antibacterial Applications. Molecules, 2021, 26 (7), pp.1920. ⟨10.3390/molecules26071920⟩. ⟨hal-03190711⟩

Partager

Métriques

Consultations de la notice

50

Téléchargements de fichiers

54