Anionic Dye Removal with a Thin Cationic Polyaniline Coating on Cellulosic Biomaterial - Laboratoire d'Automatique et de Génie dEs Procédés
Article Dans Une Revue ACS Omega Année : 2024

Anionic Dye Removal with a Thin Cationic Polyaniline Coating on Cellulosic Biomaterial

Résumé

This paper reports the development of novel adsorbent materials using polyaniline (PANI) grafted onto Posidonia (POS) fibers, aimed at efficiently removing phenol red (PSP), an anionic dye, from aqueous solutions. The synthesis involved the copolymerization of aniline grafted on the surface of POS and aniline monomer in solution, resulting in a chemically bound thin PANI layer on the POS bioadsorbent. Structural characteristics and binding affinities of these adsorbents with PANI under its emeraldine salt (POS@PANI-ES) or emeraldine base (POS@PANI-EB) forms are reported. The rapid adsorption kinetics observed is attributed to enhanced accessibility to PANI adsorption sites on the POS surface. The binding percentages of PSP to POS@PANI-ES and POS@PANI-EB materials were found to be 97% and 50%, respectively, after 15 minutes of contact time. The Langmuir model for localized adsorption sites and the Volmer model for non-localized adsorption as a mobile layer were fitted to the experimental adsorption isotherms of PSP to POS@PANI-EB and POS@PANI-ES, yielding the thermodynamic parameters of adsorption. The adsorption capacities of PSP on POS@PANI-EB and POS@PANI-ES were 37.8 and 71.5 µmol•g -1 , respectively. The adsorption of PSP remained above 80% at moderate salt concentrations around 0.1 mol•L -1 ; however, higher concentrations of NaCl and CaCl2 in PSP solutions significantly reduced adsorption on POS@PANI-ES.

Fichier principal
Vignette du fichier
ACS Omega_2024_9_15935.pdf (2.27 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04688121 , version 1 (04-09-2024)

Identifiants

Citer

Karima Ferchichi, Amaini Chouchaine, Noureddine Amdouni, Yves Chevalier, Souhaira Hbaieb. Anionic Dye Removal with a Thin Cationic Polyaniline Coating on Cellulosic Biomaterial. ACS Omega, 2024, 9 (14), pp.15935-15949. ⟨10.1021/acsomega.3c09031⟩. ⟨hal-04688121⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

More