Investigation of performance of a low ZnAl2O4–TiO2 ultrafiltration membrane in relation with speciation and membrane solutes interactions

Abstract The low ultrafiltration (UF) membranes performances depend mainly on the nature of the interactions between the solutes and the membrane material. This paper reports the filtration tests of different salts: CH 3 COONa, Na 2 HPO 4 and NaF by means of a TiO 2 –ZnAl 2 O 4 membrane prepared by sol–gel route deposed on a moroccan clay support. The measured rejections depend at once on the pH, on ionic strength of the solution; their interpretation needs to precise the exact speciation of the filtered species.