Combination of nano TiO2 photocatalytic oxidation with microfiltration (MF) for natural organic matter removal

摘要

TiO2 photocatalytic oxidation was combined with microfiltration (MF) (PCOMF) to remove humicnacid (HA) in waters through investigating the flux performance, TOC, UV254 and UV436 removalnefficiency, the fouled membrane surfaces by SEM. The results demonstrated that the combinednPCOMF process showed a high removal efficiency of UV254 and UV436 of HA (close to 100%).nThe removal efficiency of TOC was about 84.34% indicating that most of HA was mineralized intonwater and carbon. The SEM images witnessed that the fouling on the membrane surfacesncontaminated by PCO effluents after UV254 and UV365 light irradiation was mainly attributed toncake layer, which was reversible due to the increase of aggregated particles size consisting of HAnand TiO2. Eventually, the combined PCOMF process displayed an improved effect on HA removalnand fouling control to a certain level.