Sisay Elias Jigar and Fazekas Ákos and László Zsuzsanna: Poly (vinylidene fluoride)/TI02-CNT nanocomposite ultrafiltration membranes for wastewater treatment.
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Abstract
Nowadays incorporation of nano-materials into polymers becoming a focus research area in membrane separation and purification technology. The fabricated nano-composite polymers offers an increased hydrophilicity and photo-catalytic benefits. However, the main advantages of each type of the nano-materials are limited. In this study ultra-filtration polymer nanocomposite membranes were prepared using TiO2 and CNT. Our recent work aims to examine the effect of TiO2 and CNT on filtration properties of PVDF membrane. The contact angle of the neat membrane was78º, which could be lowered in case of the modified membranes of PVDF-TiO2 and PVDF-TiO2-CNT to 57.9 º and 64.63 º respectively. This implies that TiO2 and CNT made the PVDF membrane hydrophilic due to their functional groups. It was found that the modification reduces the filtration resistance and enhances the flux. The water flux (L/m2 h) for neat PVDF membrane, PVDF-TiO2 and TiO2-CNT- PVDF was 67.22, 82.94 and 81.07 respectively. Neat PVDF membrane shows higher filtration resistance than TiO2-PVDF and TiO2-CNT-PVDF membrane. The irreversible foaling for neat PVDF was higher than the modified membranes. Regeneration of the fouled modified membranes by UV irradiation was possible.BSA and COD rejection was promising. The neat PVDF membrane rejects 99.84% BSA and 99.83% COD. The modified PVDF-TiO2 also rejects 97.58% BSA and 99.74% COD while PVDF-TiO2–CNT showed a rejection of 97.46% BSA and 97.05% COD. Relatively better regeneration of the fouled membrane was observed in the presence of CNT. The reasons for this phenomenon could be due to the reduction in recombination of electrons/holes and enhancement of photo-catalytic activity of TiO2 by CNT as it sinks electrons/ holes. These results may offer significant new findings which are useful to development of modified membrane.
| Item Type: | Conference or Workshop Item |
|---|---|
| Journal or Publication Title: | Proceedings of the International Symposium on Analytical and Environmental Problems |
| Date: | 2020 |
| Volume: | 26 |
| ISBN: | 978-963-306-771-0 |
| Page Range: | pp. 49-53 |
| Language: | English |
| Event Title: | International Symposium on Analytical and Environmental Problems (26.) (2020) (Szeged) |
| Related URLs: | http://acta.bibl.u-szeged.hu/73792/ |
| Uncontrolled Keywords: | Szennyvízkezelés, Környezetkémia |
| Additional Information: | Bibliogr.: p. 52-53. ; összefoglalás angol nyelven |
| Subjects: | 01. Natural sciences 01. Natural sciences > 01.04. Chemical sciences |
| Date Deposited: | 2021. Nov. 16. 14:06 |
| Last Modified: | 2022. Aug. 08. 15:39 |
| URI: | http://acta.bibl.u-szeged.hu/id/eprint/73950 |
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