| Title | Application of immobilized TiO2 on PVDF dual layer hollow fibre membrane to improve the photocatalytic removal of pharmaceuticals in different water matrices |
| Abstract | A promising membrane configuration based on immobilized TiO2 on poly(vinylidene fluoride) (PVDF) dual layer hollow fibre membranes was prepared and successfully employed for the photocatalytic degradation of eight pharmaceuticals. Experiments were carried out in a flow reactor of 0.5 L equipped with a lamp emitting at 254 nm, treating groundwater and secondary wastewater effluent. The efficiency of the new catalyst to phototransform target micropollutants was demonstrated, being dependent on the selected compound. Only the application of photocatalysis using the supported catalyst allowed to increase the phototransformation rate of trimethoprim, metoprolol and carbamazepine treating secondary wastewater effluent (1.4-2.2 times faster than photolysis). The determination of electrical energy per order of magnitude of transformation (EEO) confirmed the lowest energy requirements to transform selected pharmaceuticals in secondary effluent employing the supported catalyst (33-58 kW h m-3 compared to 49-79 kW h m-3 applying only photolysis). The detection and identification of transformation products formed during the investigated treatments was performed by UPLC-QTOF/MS/MS. 156 transformation products were detected showing two different types of time profiles, namely a bell-shape trend or a constant increase along reaction time thus accumulating in the reaction mixture. The chemical structure for 19 out of 156 detected compounds was proposed as derived from parent compounds spiked in the secondary effluent. ? 2018 Elsevier B.V. |
| Source | Applied catalysis. B, Environmental (Print) 240, pp. 9–18 |
| Keywords | Compounds of emerging concernImmobilized titanium dioxide catalyst; Non-target screening; Secondary wastewater effluent; Transformation products |
| Journal | Applied catalysis. B, Environmental (Print) |
| Editor | Elsevier, Amsterdam ;, Paesi Bassi |
| Year | 2019 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.apcatb.2018.08.067 |
| Authors | Paredes, L. and Murgolo, S. and Dzinun, H. and Dzarfan Othman, M.H. and Ismail, A.F. and Carballa, M. and Mascolo, G. |
| Text | 397361 2019 10.1016/j.apcatb.2018.08.067 Scopus 2 s2.0 85052641126 Compounds of emerging concern Immobilized titanium dioxide catalyst; Non target screening; Secondary wastewater effluent; Transformation products Application of immobilized TiO2 on PVDF dual layer hollow fibre membrane to improve the photocatalytic removal of pharmaceuticals in different water matrices Paredes, L. and Murgolo, S. and Dzinun, H. and Dzarfan Othman, M.H. and Ismail, A.F. and Carballa, M. and Mascolo, G. Department of Chemical Engineering, Institute of Technology, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain; CNR, Istituto di Ricerca Sulle Acque, Via F. De Blasio 5, Bari, 70132, Italy; Advanced Membrane Technology Research Centre AMTEC , Universiti Teknologi Malaysia, Skudai, Johor 81310, Malaysia; Centre for Diploma Studies CeDS , Universiti Tun Hussein Onn Malaysia, Muar, Johor 84600, Malaysia A promising membrane configuration based on immobilized TiO2 on poly vinylidene fluoride PVDF dual layer hollow fibre membranes was prepared and successfully employed for the photocatalytic degradation of eight pharmaceuticals. Experiments were carried out in a flow reactor of 0.5 L equipped with a lamp emitting at 254 nm, treating groundwater and secondary wastewater effluent. The efficiency of the new catalyst to phototransform target micropollutants was demonstrated, being dependent on the selected compound. Only the application of photocatalysis using the supported catalyst allowed to increase the phototransformation rate of trimethoprim, metoprolol and carbamazepine treating secondary wastewater effluent 1.4 2.2 times faster than photolysis . The determination of electrical energy per order of magnitude of transformation EEO confirmed the lowest energy requirements to transform selected pharmaceuticals in secondary effluent employing the supported catalyst 33 58 kW h m 3 compared to 49 79 kW h m 3 applying only photolysis . The detection and identification of transformation products formed during the investigated treatments was performed by UPLC QTOF/MS/MS. 156 transformation products were detected showing two different types of time profiles, namely a bell shape trend or a constant increase along reaction time thus accumulating in the reaction mixture. The chemical structure for 19 out of 156 detected compounds was proposed as derived from parent compounds spiked in the secondary effluent. 2018 Elsevier B.V. 240 Published version https //www.scopus.com/inward/record.uri eid=2 s2.0 85052641126 doi=10.1016%2fj.apcatb.2018.08.067 partnerID=40 md5=85fbba6cdfbe4977102bed8f99a1dfd5 cited By 0 Articolo in rivista Elsevier 0926 3373 Applied catalysis. B, Environmental Print Applied catalysis. B, Environmental Print Appl. catal., B Environ. Print Applied catalysis. Print sapia.murgolo MURGOLO SAPIA giuseppe.mascolo MASCOLO GIUSEPPE |
