165104 20251212165958.0 doi 10.1007/s11356-019-07276-3 sideral 116179 ART-2020-116179 eng Moles, Samuel Universidad de Zaragoza (orcid)0000-0002-1401-7511 Performance comparison of commercial TiO2: separation and reuse for bacterial photo-inactivation and emerging pollutants photo-degradation 2020 This research aims to compare the disinfection and degradation effectiveness in water of a commercial suspension of nano-TiO<inf>2</inf> (TiO<inf>2</inf>Levenger) with the standard TiO<inf>2</inf>Degussa P25. Photo-inactivation and photo-degradation experiments were conducted with UVA-vis light. Concerning the disinfection, the effects of TiO<inf>2</inf> dose (0‚Äì2¬†g/l), water matrix, bacterium type (Gram-positive or Gram-negative), and bacterial regrowth after the photo-treatments were studied for each catalyst. The experimental results show that Enterococcus sp. (Gram-positive) was more resistant to the photo-treatments than Escherichia coli (Gram-negative) for both catalyst; however, postirradiation trends showed similar behavior for both bacteria, favoring regrowth for short-treated cells and decay for longer-treated ones. Caffeine was selected as a model substance of pharmaceuticals and personal care products. In terms of caffeine removal, the effects of TiO<inf>2</inf> dose (0‚Äì2¬†g/l) and water matrix were analyzed. Besides, the comparison between mechanical coagulation-flocculation-decantation and simple decantation of TiO<inf>2</inf> was carried out. The results show that simple decantation allowed the recovery of 97.5% of TiO<inf>2</inf> Degussa P25 and TiO<inf>2</inf> Levenger within 1¬†day of simple decantation, while applying the proposed mechanical coagulation-flocculation decantation 99.7% of recovery of both catalysts was achieved in 2¬†hours. Finally, the subsequent reuse of both catalysts was proved with little loss of efficiency in terms of photo-disinfection during the four cycles. Nevertheless, the standard TiO<inf>2</inf> Degussa P25 photo-degradation efficiency of caffeine decreases considerably as compared to commercial suspension of TiO<inf>2</inf> Levenger concerning the reutilization. info:eu-repo/grantAgreement/ES/DGA-FSE/T51-17R info:eu-repo/semantics/closedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 4.223 2020 ENVIRONMENTAL SCIENCES 91 / 273 = 0.333 2020 Q2 T2 0.844 2020 Environmental Chemistry 2020 Q2 Pollution 2020 Q2 Medicine (miscellaneous) 2020 Q2 Health, Toxicology and Mutagenesis 2020 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Valero, Pilar (orcid)0000-0002-4019-4466 Escuadra, Silvia (orcid)0000-0001-9898-0139 Mosteo, Rosa Universidad de Zaragoza (orcid)0000-0002-7456-4912 Gómez, Jairo Ormad, María P. Universidad de Zaragoza (orcid)0000-0003-3014-0322 5005 790 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Tecnologi. Medio Ambiente 27 (2020), 9099–9113 Environ. sci. pollut. res. int. Environmental Science and Pollution Research 0944-1344 2507145 http://zaguan.unizar.es/record/165104/files/texto_completo.pdf Versión publicada 2343541 http://zaguan.unizar.es/record/165104/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:165104 articulos driver 2025-12-12-14:42:45 ARTICLE