Fabrication of high selectivity blend membranes based on poly vinyl alcohol for crystal violet dye removal

Recently membrane technology is considered most effective and promising process for water treatment with high efficiency. So to overcome the brittle problems for cellulose acetate membranes, blend membranes with polyvinyl alcohol were prepared using phase inversion method for crystal violet (CV) dye separation. The characterizations for prepared membranes were performed by scanning electron microscopy (SEM), contact angle, mechanical properties and fouling properties. The prepared membrane from CA/PVA with PVA ratio 6% (M5) has high antifouling properties and good surface wettability. The optimized M5 has molecular weight cut off (800Dalton). The performance of M5 Membrane was carried out using different dye concentrations. Also, long term experiment was performed to prove the efficiency of prepared membrane. CV dye separation increased form 56 % with 0% PVA to reach the maximum 99.9 % with 6% PVA, while the membrane still has better Flux 17 LHM. M5 blend membrane displays good durability property during long term experiments.