The Evaluation of Photo Catalytic-Membrane Reactor with Nanomaterials for Removing Virus

Abstract

Nanometer photo catalytic-membrane reactor integrated photo catalytic technology with membrane separation technology was applied to remove virus existing in water. Bacteriophage f2 was used as surrogates for human enteric viruses. Two kinds of nanomaterials (TiO2and ZnO) were selected as the catalyst. Three kinds of membranes interception performance for virus, adsorption efficiency of nanomaterial for virus, inactivated effect for virus with photo catalysis, and the comprehensive effect to f2 of photo catalytic-membrane reactor were studied under the transmembrane pressure of 20Kpa, with nanomaterial concentration of 100mg/L, light dose of 20mJ/cm2. It showed that the interception effect of flat membrane with casting was the best. the adsorption efficiency of the two kinds of nanomaterials was different, 1.478 lg and 0.201 lg for TiO2and ZnO, respectively. The removal effect of the photo catalytic oxidation system to f2 was similar, both in 2-3 log. The removal efficiency of the photo catalytic-membrane reactor system has no obvious difference, both in 3-4 log, and it is improved significantly compared to the effect of individual photo catalysis and membrane separation. Further research indicates that: the elimination function of coupling system to f2 includes UV-inactivated, adsorption of nanomaterials, the inactivation of nanomaterials, the effect of oxide moiety which formed after nanomaterials absorbing ultraviolet light and membrane retention.

Photocatalytic property and pH-response behavior of modified ZnO electrospun nanofibers grafted with poly(methyl methacrylate)

“…ZnO nanomaterials, due to their better biocompatibility and lower costs, have shown promising potentials in drug delivery and therapy treatment [1,2]. With the generated reactive oxygen species (ROS) under UV illumination, ZnO nanomaterials with photocatalytic activity would show the ability of killing [3,4], virus [5,6] and cancer cells [7,8] effectively. Moreover, pH response of ZnO nanomaterials to the applied medium would further make them ideally selectable for target drug delivery [9][10][11].…”