Multi-functional tannic acid (TA)-Ferric complex coating for forward osmosis membrane with enhanced micropollutant removal and antifouling property

A novel tannic acid - ferric (TA-Fe) complex coating was applied to commercially available cellulose triacetate (CTA) forward osmosis (FO) membrane enhance performance. Notably, the coated attained a better water/salt selectivity than control and it had mild water permeability loss of about 13.6%. Consequently, when is operated in FO system, reverse salt flux smaller as compared uncoated membrane. Also, rejection three selected micropollutants improved this due both increased hydrophilicity decreased effective pore size. In fouling tests, with support layer facing feed solution (PRO mode), normalized for from 1 0.4. For our on side, higher 0.5 after test under same conditions, confirming its antifouling property. The improvement membrane's surface roughness interaction energy barrier between foulant These results represent new contribution wastewater treatment using based success authors' method potential offer multiple performance improvements osmotic pressure-driven processes.