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Photocatalytic inactivation of Enterobacter cloacae and Escherichia coli using titanium dioxide supported on two substrates
dc.creator | Aguas Y. | |
dc.creator | Hincapié M. | |
dc.creator | Sánchez C. | |
dc.creator | Botero L. | |
dc.creator | Fernández-Ibañez P. | |
dc.date | 2018 | |
dc.date.accessioned | 2021-02-05T15:00:13Z | |
dc.date.available | 2021-02-05T15:00:13Z | |
dc.identifier.issn | 22279717 | |
dc.identifier.uri | http://hdl.handle.net/11407/6157 | |
dc.description | The antibacterial photocatalytic activity of TiO2 supported over two types of substrates, borosilicate glass tubes (TiO2/SiO2-borosilicate glass tubes (BGT)) and low-density polyethylene pellets (TiO2-LDPE pellets), which were placed in a compound parabolic collectors (CPC) reactor, was evaluated against Enterobacter cloacae and Escherichia coli under sunlight. Three solar photocatalytic systems were assessed, suspended TiO2, TiO2/SiO2-BGT and TiO2-LDPE pellets, at three initial bacterial concentrations, 1 × 105; 1 × 103; 1 × 101 CFU/mL of E. coli and total bacteria (E. cloacae and E. coli). The solar photo-inactivation of E. coli was achieved after two hours with 7.2 kJ/L of UV-A, while total bacteria required four hours and 16.5 kJ/L of UV-A. Inactivation order of E. coli was determined, as follows, suspended TiO2/sunlight (50 mg/L) > TiO2-LDPE pellets/sunlight (52 mg/L) > TiO2/SiO2-BGT/sunlight (59 mg/L), the best E. coli. inactivation rate was obtained with TiO2-LDPE pellets/sunlight, within 4.5 kJ/L and 90 min. The highest total bacteria inactivation rate was found for TiO2/sunlight (50 mg/L) and TiO2-LDPE pellets/sunlight (52 mg/L), within 11.2 kJ/L and 180 min. TiO2 deposited over LDPE pellets was the most effective material, which can be successfully used for water disinfection applications. Bacterial regrowth was assessed 24 h after all photocatalytic treatments, none of those microorganisms showed any recovery above the detection limit (2 CFU/mL). © 2018 by the authors. | |
dc.language.iso | eng | |
dc.publisher | MDPI AG | |
dc.relation.isversionof | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85053816693&doi=10.3390%2fpr6090137&partnerID=40&md5=aa1a96e7a7fba6e2bb9457b5b75b163f | |
dc.source | Processes | |
dc.title | Photocatalytic inactivation of Enterobacter cloacae and Escherichia coli using titanium dioxide supported on two substrates | |
dc.type | Article | eng |
dc.rights.accessrights | info:eu-repo/semantics/restrictedAccess | |
dc.publisher.program | Ingeniería Ambiental | spa |
dc.identifier.doi | 10.3390/pr6090137 | |
dc.relation.citationvolume | 6 | |
dc.relation.citationissue | 9 | |
dc.publisher.faculty | Facultad de Ingenierías | spa |
dc.affiliation | Aguas, Y., School of Engineering, Universidad de Sucre, Sincelejo, 700001, Colombia, School of Engineering, Universidad de Medellín, Medellín, 050026, Colombia | |
dc.affiliation | Hincapié, M., School of Engineering, Universidad de Medellín, Medellín, 050026, Colombia | |
dc.affiliation | Sánchez, C., School of Engineering, Universidad de Antioquia, Medellín, 050010, Colombia | |
dc.affiliation | Botero, L., School of Engineering, Universidad de Medellín, Medellín, 050026, Colombia | |
dc.affiliation | Fernández-Ibañez, P., Nanotechnology and Integrated BioEngineering Centre, School of Engineering, University of Ulster, Newtownabbey, Northern Ireland, BT37 0QB, United Kingdom | |
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dc.type.version | info:eu-repo/semantics/publishedVersion | |
dc.type.driver | info:eu-repo/semantics/article |
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