Document Type : Research Paper
Laboratoire Genie des Materiaux pour Environnement et Valorisation (GeMEV), Equipe I3MP, Universite Hassan II, Faculte des Sciences Ain Chock, B.P. 5366, Maarif, Casablanca, Morocco
Institut de Sciences Des Materiaux De Mulhouse (IS2M-UMR 7361 CNRS - UHA)- Mulhouse, France
Laboratoire de Recherche sur les Materiaux Textiles (REMTEX), ESITH, Casablanca, Morocco
In the present work, two asymmetric polymer membranes based on polyvinylidene fluoride (PVDF) and polyvinylpyrrolidone (PVP) with chitin and chitosan (as extractive agents) were synthesized through the phase inversion technique. The mechanisms of oriented process for the facilitated extraction of blue P3R dye across the as-prepared membranes were elucidated through different experiments. Further, kinetic and thermodynamic models based on Fick's first law were used to determine the macroscopic (permeability (P) and initial flux (J0)) and the microscopic (association constant (Kass) and apparent diffusion coefficient (D*)) parameters of the membranes. Finally, the values of different activation parameters (energy (Ea), enthalpy (ΔH≠), and entropy (ΔS≠)) were determined using theoretical models, and the analytical results revealed a kinetic control through the PVDF/PVP-chitin membrane and an energetic control through its PVDF/PVP-chitosan counterpart.