Oriented membranes processes for facilitated extraction and recovery of some industrial dyes across polymer inclusion membranes containing Chitin as new extractive agent

Abstract

In this study, we developed a polymer inclusion membrane (PIM) using the phase inversion technique, based on polymer supports polyvinylidene fluoride (PVDF) and polyvinylpyrrolidone (PVP), with chitin as extractive agent (EA). This PIM was used to study facilitated extraction and recovery processes of Astrazon Red FBL 200%, Blue P3R, Direct Turquoise FBL 400% and BEMACID Yellow N-TF dyes from simulated aqueous textile solutions. To explore the composition, structure and morphology of the developed PIM, both FTIR and SEM techniques were used. To explain the performance of the PIM and describe the mechanism of the process studied for the recovery of dyes from simulated wastewater, kinetic and thermodynamic models were also adopted, which are based on Fick’s laws and the saturation law of EA by the substrate (dyes). The overall data indicate that the used EA is effective for theses oriented processes, and the facilitated extraction of dyes is not depending on the pore size but on structures and interactions between the molecules of the EA and the dye.

Reliable and efficient membrane processes for clean and sustainable production of fresh water from saline waste

“…This finding confirms previous studies carried out through this membrane type 70. This interpretation is also confirmed and consolidated by the work of some members of M. Hlaibi's team on the diffusion processes of different substrates, organic molecules and ions [93][94][95].…”

Ionic Liquids and Activated Carbon: Effective Materials for the Sustainable Production of Fresh Water from Salt Effluents (BRINE)

“…The nonsolvent induced phase separation (NSIP) method by coagulation in a water bath was used for the development of envisaged membranes. , Quantities of polymer supports PVDF (6 g) and PSU (4 g) were dissolved in 5 mL of DMF and mechanically stirred at 60 °C for 4 h to achieve complete dissolution. To this homogeneous solution, 33% by weight of TOMAO IL was added as an extractive agent.…”