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Keywords = photo catalytic micro ultra-filtration

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15 pages, 3957 KiB  
Article
Photocatalytic Nanocomposite Polymer-TiO2 Membranes for Pollutant Removal from Wastewater
by Khelil Bouziane Errahmani, Ouassila Benhabiles, Sohbi Bellebia, Zohra Bengharez, Mattheus Goosen and Hacene Mahmoudi
Catalysts 2021, 11(3), 402; https://doi.org/10.3390/catal11030402 - 23 Mar 2021
Cited by 32 | Viewed by 3966
Abstract
Photocatalytic TiO2-PVDF/PMMA nano-composites flat sheet membranes were fabricated by phase inversion and then employed in a crossflow filtration pilot to remove model pollutants of various sizes and charge from aqueous solution. The dope solution contained a mixture of PVDF and PMMA [...] Read more.
Photocatalytic TiO2-PVDF/PMMA nano-composites flat sheet membranes were fabricated by phase inversion and then employed in a crossflow filtration pilot to remove model pollutants of various sizes and charge from aqueous solution. The dope solution contained a mixture of PVDF and PMMA as polymers, polyethylene glycol (PEG) and polyvinylpyrrolidone (PVP) as additives, triethyl phosphate (TEP) as green solvent and TiO2 as immobilized photo catalyst. After undergoing characterization tests such as SEM morphology thickness, porosity, contact angle and water permeability, the membranes were used to eliminate the model pollutants from synthetic aqueous solution. The impact of the operating conditions (i.e., pH, pressure and initial pollutant concentration) and composition of the doping solution on the performance and photocatalytic and antifouling activity of the membranes was investigated. The results showed that Congo Red and Tartrazine despite their small size were rejected at 99% and 81%, respectively, because of their negative charge, while Ciprofloxacin, which is larger than Tartrazine but of neutral charge, crossed the membrane. The permeability did not decrease with a decline in pollutant concentration but diminished when the pressure increased and was reduced by more than half for wastewater. Full article
(This article belongs to the Special Issue Photocatalysis in the Wastewater Treatment)
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