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http://hdl.handle.net/2445/199403
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DC Field | Value | Language |
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dc.contributor.author | Chen, Zehong | - |
dc.contributor.author | Xia, Pan | - |
dc.contributor.author | Wang, Dazhi | - |
dc.contributor.author | Niu, Xiaodong | - |
dc.contributor.author | Ao, Lixin | - |
dc.contributor.author | He, Qiang | - |
dc.contributor.author | Wang, Sha | - |
dc.contributor.author | Ye, Zhihong | - |
dc.contributor.author | Sirés Sadornil, Ignacio | - |
dc.date.accessioned | 2023-06-16T16:36:06Z | - |
dc.date.issued | 2023-04-19 | - |
dc.identifier.issn | 0048-9697 | - |
dc.identifier.uri | http://hdl.handle.net/2445/199403 | - |
dc.description.abstract | Hydroxyl radical (¿OH) is considered the dominant reactive species in the electro-Fenton (EF) and Fered-Fenton (EFFere) processes for wastewater treatment. However, in chloride-rich media, this is arguable due to the obscure mechanisms for the oxidant speciation and pollutant degradation. Herein, the role of active chlorine and Fe(IV)-oxo species (FeIVO2+) as primary oxidizing agents in HClO-mediated Fered-Fenton (EF-Fere-HClO) process is discussed, along with the dependence of their contribution on the pollutant structure. HClO generated from anodic oxidation of Cl− can be consumed by added H2O2 to form singlet oxygen (1O2), which is detrimental because this species is quickly deactivated by water. The reaction between HClO and Fe2+ was proved to generate FeIVO2+, rather than ¿OH or Cl¿ suggested in the literature. The yield of FeIVO2+ species was proportional to the Cl− concentration and barely affected by solution pH. The long-lived HClO and FeIVO2+ can selectively react with electron-rich compounds, which occurs simultaneously to the non-selective attack of ¿OH formed from Fenton's reaction. The FeIVO2+ and ¿OH concentration profiles were successfully modelled. Although the accumulation of toxic chlorinated by-products from HClO-mediated oxidation might cause newenvironmental concerns, the toxicity of pesticide wastewater with 508mMCl− was halved upon EF-Fere-HClO treatment. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Elsevier B.V. | - |
dc.relation.isformatof | Versió postprint del document publicat a: https://doi.org/10.1016/j.scitotenv.2023.163596 | - |
dc.relation.ispartof | Science of the Total Environment, 2023, vol. 882, p. 163596 | - |
dc.relation.uri | https://doi.org/10.1016/j.scitotenv.2023.163596 | - |
dc.rights | cc-by-nc-nd (c) Elsevier B.V., 2023 | - |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | - |
dc.source | Articles publicats en revistes (Ciència dels Materials i Química Física) | - |
dc.subject.classification | Clorurs | - |
dc.subject.classification | Electroquímica | - |
dc.subject.classification | Contaminants | - |
dc.subject.other | Chlorides | - |
dc.subject.other | Electrochemistry | - |
dc.subject.other | Pollutants | - |
dc.title | New insights into the mechanism of Fered-Fenton treatment of industrial wastewater with high chloride content: Role of multiple reactive species | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 733495 | - |
dc.date.updated | 2023-06-16T16:36:06Z | - |
dc.rights.accessRights | info:eu-repo/semantics/embargoedAccess | - |
dc.embargo.lift | 2025-04-19 | - |
dc.date.embargoEndDate | info:eu-repo/date/embargoEnd/2025-04-19 | - |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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Document embargat fins el
19-4-2025
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