Chitosan: Polyvinyl alcohol based mixed matrix sustainable coatings for reusing composite membranes in water treatment: Fouling characterization

This work aims at studying the potential of modifying surface used polyamide (PA) reverse osmosis (RO) commercial membranes by coatings made renewable and biodegradable polymers, chitosan (CS) polyvinyl alcohol (PVA), filled with Cu-ion-exchange layered AM-4 titanosilicate UZAR-S3 stannosilicate to provide antifouling properties enlarging life time thin-film composite (TFC) membranes. The water permeation fouling ratios were evaluated as a function active layer material in presence model organic (BSA) inorganic (NaCl) foulants. mixed matrix membrane (MMM) added on PA generally decreased flux decline increased permeate flow recovery rate. CS:PVA based promote reversible not irreversible fouling, especially CuAM-4CS:PVA. Beside, ATR-FTIR confirms nature BSA NaCl fouling. These results may future open possibility renewing useful lifetime RO simple coating method light circular economy.