Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/152797
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Steter, Juliana R. | - |
dc.contributor.author | Brillas, Enric | - |
dc.contributor.author | Sirés Sadornil, Ignacio | - |
dc.date.accessioned | 2020-03-16T09:55:31Z | - |
dc.date.issued | 2017-10-27 | - |
dc.identifier.issn | 0926-3373 | - |
dc.identifier.uri | http://hdl.handle.net/2445/152797 | - |
dc.description.abstract | Aqueous mixtures of methyl, ethyl and propyl paraben (MeP, EtP and PrP) prepared in real urban wastewater with low conductivity were treated by solar photoelectro-Fenton (SPEF) process at low input current (j = 10 mA cm-2) using a pre-pilot plant with an electrochemical reactor equipped with an air-diffusion cathode to electrogenerate H2O2 and a boron-doped diamond (BDD) or RuO2-based anode. Comparative trials in simulated water matrices with or without Cl− in the absence of natural organic matter (NOM) always led to a slower decay of parabens concentration and total organic carbon (TOC). This was mainly due to the superior regeneration of Fe2+ from photoreduction of Fe(III) complexes formed with NOM in real wastewater compared to that from Fe(OH)2+. In all matrices, a catalyst concentration as low as 0.20 mM Fe2+ was enough to ensure the production of ¿OH in the bulk from Fenton's reaction. SPEF with BDD yielded a complete removal of parabens in 180 min and 66% mineralization at 240 min. This gave rise to the greatest mineralization current efficiencies reported so far, up to 1000%, with a low energy consumption of 84 kWh (kg TOC)-1. The synergy between homogeneous and heterogeneous catalysis, which allowed the efficient dosage of ¿OH and M(¿OH) at low j, with simultaneous action of high UV power from sunlight justified such a good performance. Analogous apparent rate constants were determined for MeP, EtP and PrP. Slower decays were found with RuO2-based anode due to its lower oxidation power. As a result, the MCE was 425% as maximum, but a lower energy consumption of 52 kWh (kg TOC)-1 was needed. Since the role of active chlorine was of minor importance, the formation of toxic, refractory chloroderivatives was minimized. All by-products were transformed into malic, formic and oxalic acids prior to total mineralization. | - |
dc.format.extent | 9 p. | - |
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.apcatb.2017.10.060 | - |
dc.relation.ispartof | Applied Catalysis B-Environmental, 2018, vol. 224, p. 410-418 | - |
dc.relation.uri | https://doi.org/10.1016/j.apcatb.2017.10.060 | - |
dc.rights | cc-by-nc-nd (c) Elsevier B.V., 2018 | - |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es | - |
dc.source | Articles publicats en revistes (Ciència dels Materials i Química Física) | - |
dc.subject.classification | Electroquímica | - |
dc.subject.classification | Depuració de l'aigua | - |
dc.subject.other | Electrochemistry | - |
dc.subject.other | Water purification | - |
dc.title | Solar photoelectro-Fenton treatment of a mixture of parabens spiked into secondary treated wastewater effluent at low input current | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 674140 | - |
dc.date.updated | 2020-03-16T09:55:31Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
674140.pdf | 452.31 kB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License