Preparation of ZrO2/TiO2/Al2O3 Nanofiltration Lab-Scale Membrane for Filtering Heavy Metal Ions

ZrO2 is an excellent ceramic preparation material that can maintain chemical stability in medium–strong acid and alkali environments. The sintering impregnation method was used to prepare the ZrO2/TiO2/Al2O3 composite nanofiltration membrane (ZTA membrane). Nano-ZrO2, submicron TiO2, microporous Al2O3 were as surface layer, transition support respectively. structure phase of measured by scanning electron microscopy (SEM) X-ray diffractometer (XRD). membrane’s retention, hydrophilic hydrophobic properties characterized evaluated using a UV–Vis spectrophotometer, water contact angle tester (WCA), dead-end filtration device. With increase separation layer deposition time, retention rate methyl blue increased, flux decreased. At time 75 min, more than 80%, reached 337.5 L·m−2 h−1 bar−1 at −1 bar transmembrane pressure. membranes are have different interception abilities for metal ions, order effect Ag+ > Cu2+ Mg2+ Na+, 65.3% 50.5%, prepared ZTA has potential application value heavy ion filtration.