Tio2 nanorészecskékkel bevont membránok jellemzőinek és fotokatalitikus aktivitásának vizsgálata
Polyethersulfone (PES) membranes are used in a wide range for water and wastewater treatment due to their physical and chemical properties, but despite their improved properties membrane fouling remains a problem. In order to overcome this problem a great deal of interest has been focused on modifyi...
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| Dokumentumtípus: | Könyv része |
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2015
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| Sorozat: | Proceedings of the International Symposium on Analytical and Environmental Problems
21 |
| Kulcsszavak: | Membránok, Víztisztítás, Kémia |
| Online Access: | http://acta.bibl.u-szeged.hu/55924 |
| Tartalmi kivonat: | Polyethersulfone (PES) membranes are used in a wide range for water and wastewater treatment due to their physical and chemical properties, but despite their improved properties membrane fouling remains a problem. In order to overcome this problem a great deal of interest has been focused on modifying membranes with TiO2 as a photocatalyst to reduce fouling and to make the organic component removal more efficient. In this study polyethersulfone membranes with different pore sizes (0.05 and 0.2 µm) were coated with commercial TiO2 (Aeroxide P25) and synthesized TiO2 nanoparticles (NP) by filtering the TiO2 suspension through the membrane. In order to test the photocatalytic activity Acid Red 1 dye solutions were filtered with commercial PES membranes with and without TiO2 coating. Coated membranes had significantly lower fluxes compared to the neat membranes. Contact angle measurements showed that TiO2 P25 formed a very hydrophilic coat on the membranes on the contrary TiO2 NP increased the hydrophobicity of the surface. UV irradiation had an effect on both the neat and coated membranes flux values. Relative dye fluxes were calculated against the equivalent water fluxes and were compared. UV irradiation increased the dye elimination efficiency of the coated membranes, which proves the TiO2 coatings photocatalytic activity. |
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| Terjedelem/Fizikai jellemzők: | 43-47 |
| ISBN: | 978-963-306-411-5 |