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http://hdl.handle.net/10662/13821
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Campo DC | Valor | idioma |
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dc.contributor.author | Figueredo Fernández, Manuel Alfredo | - |
dc.contributor.author | Rodríguez Franco, Eva María | - |
dc.contributor.author | Rivas Toledo, Francisco Javier | - |
dc.contributor.author | Beltrán Novillo, Fernando Juan | - |
dc.date.accessioned | 2022-02-23T12:07:36Z | - |
dc.date.available | 2022-02-23T12:07:36Z | - |
dc.date.issued | 2021 | - |
dc.identifier.uri | http://hdl.handle.net/10662/13821 | - |
dc.description.abstract | Numerous studies report on the synergy between ozonation and photocatalytic oxidation (TiO₂/UVA), which could open the way to the application of photocatalytic ozonation (PCOz) in water treatment. With the aim of establishing the existence of this synergy and its origin, in this work, using TiO₂ P25, 365 nm UVA LEDs and ozone transferred doses up to 5 mg (mg DOC₀)−1 (DOC₀ 7 – 10 mg L−1), a systematic study has been carried out featuring the effect of pH, alkalinity and water matrix in each of the systems involved in PCOz, with special attention to the role of organics adsorption onto TiO2. In ultrapure water, an increase in pH and carbonates content exerted a slight negative effect on the photocatalytic degradation of primidone (low adsorption onto TiO₂ and mainly abated by free HO*), this effect being higher on its mineralization. The negative effect of pH and alkalinity was much stronger for oxalic acid (high tendency to adsorb and mainly oxidized by positive holes). Accordingly, the results obtained at pH < pHpzc (point of zero charge of the catalyst) in ultrapure water cannot at all be extrapolated to secondary effluents, since their composition negatively affects the photocatalytic performance. At the experimental conditions applied, only for the secondary effluent a synergy between O3/UVA and TiO₂/UVA systems was observed. This synergy would be related, on the one hand, to the generation, from the matrix itself, of reactive entities or intermediates that promote the decomposition of ozone into HO*; and, on the other hand, to an increase in catalyst activity as the matrix UVA absorption decreases, rather than from direct interactions between both systems. Despite de above, ozone requirement to achieve a significant reduction of DOC is high and would only be an interesting strategy for the elimination of ozone-refractory micropollutants. | es_ES |
dc.description.sponsorship | The authors thank the Ministerio de Economía y Competitividad of Spain and the European Funds for Regional Development (project CTQ2015/46944-R) and Agencia Estatal de Investigaci´on of Spain (project PID2019-104429RB-I00/AEI/10.13039/501100011033) for the economic support. Manuel Alfredo Figueredo Fern´andez is grateful to the Ministerio de Economía y Competitividad of Spain for his predoctoral grant (Resolution 28/03/2017, BOE no. 217, of 08/09/2016, reference number BES-2016-078456). | es_ES |
dc.format.extent | 13 p. | es_ES |
dc.format.mimetype | application/pdf | en_US |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Photocatalytic ozonation | es_ES |
dc.subject | Synergy | es_ES |
dc.subject | High intensity UVA LEDs | es_ES |
dc.subject | Water matrix | es_ES |
dc.subject | Micropollutants and DOC removal | es_ES |
dc.subject | Ozonización fotocatalítica | es_ES |
dc.subject | Sinergia | es_ES |
dc.subject | LED UV de alta intensidad | es_ES |
dc.subject | Matriz de agua | es_ES |
dc.subject | Eliminación de microcontaminantes y DOC | es_ES |
dc.title | Photocatalytic ozonation in water treatment: Is there really a synergy between systems? | es_ES |
dc.type | article | es_ES |
dc.description.version | peerReviewed | es_ES |
europeana.type | TEXT | en_US |
dc.rights.accessRights | openAccess | es_ES |
dc.subject.unesco | 2210.22 Fotoquímica | es_ES |
dc.subject.unesco | 3303.01 Tecnología de la Catálisis | es_ES |
dc.subject.unesco | 2508.11 Calidad de las Aguas | es_ES |
dc.subject.unesco | 3308.11 Control de la Contaminación del Agua | es_ES |
europeana.dataProvider | Universidad de Extremadura. España | es_ES |
dc.identifier.bibliographicCitation | Figueredo Fernández, M.A., Rodríguez Franco, E.M., Rivas Toledo, F.J. & Beltrán Novillo, F.J. (2021). Photocatalytic ozonation in water treatment: Is there really a synergy between systems?. Water Research, 206, 117727. https://doi.org/10.1016/j.watres.2021.117727 | es_ES |
dc.type.version | publishedVersion | es_ES |
dc.contributor.affiliation | Universidad de Extremadura. Instituto Universitario de Investigación del Agua, Cambio Climático y Sostenibilidad (IACYS) | es_ES |
dc.contributor.affiliation | Universidad de Extremadura. Departamento de Ingeniería Química y Química Física | es_ES |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S0043135421009210?via%3Dihub | es_ES |
dc.identifier.doi | 10.1016/j.watres.2021.117727 | - |
dc.identifier.publicationtitle | Water Research | es_ES |
dc.identifier.publicationfirstpage | 117727-1 | es_ES |
dc.identifier.publicationlastpage | 117727-13 | es_ES |
dc.identifier.publicationvolume | 206 | es_ES |
dc.identifier.e-issn | 0043-1354 | - |
Colección: | DIQQF - Artículos |
Archivos
Archivo | Descripción | Tamaño | Formato | |
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j.watres.2021.117727.pdf | 1,55 MB | Adobe PDF | Descargar |
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