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Título: | Photoelectro-Fenton as post-treatment for electrocoagulated benzophenone-3-loaded synthetic and urban wastewater |
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Autor/a: | Ye, Zhihong; Steter, J.R.; Centellas Masuet, Francesc A.; Cabot Julià, Pere-Lluís; Brillas, Enric; Sirés Sadornil, Ignacio |
Otros autores: | Universitat de Barcelona |
Abstract: | The removal of benzophenone-3 (BP-3), a ubiquitous pollutant in municipal wastewater treatment fa-cilities, was optimal by means of a sequential electrocoagulation (EC)/UVA photoelectro-Fenton (PEF)treatment. Overall mineralization was attained upon combination of EC (Fe/Fe cell, 15 mA cm 2, 20 min)with PEF (boron-doped diamond/air-diffusion cell, 33.3 mA cm 2, 720 min), being superior to EC/electro-Fenton (EF) and requiring shorter time than single PEF. In EC, an Al/Al cell yielded the largest removal ofBP-3 in a simulated matrix at pH 11.0 due to precipitation of its neutral form caused by a substantial pHdrop, with optimum current density of 15 mA cm 2. EC of BP-3-loaded urban wastewater at natural pHwas quite effective also with a Fe/Fe cell, being preferred since it provided the required metal catalyst forsubsequent treatment. Among the electrochemical advanced oxidation processes tested, PEF was su-perior to electrochemical oxidation with electrogenerated H2O2(EO-H2O2) and EF, especially when usingthe boron-doped diamond instead of a RuO2-based anode, due to the oxidation of generated activechlorine and hydroxyl radicals, along with the photolytic action of UVA irradiation. GC-MS revealed theformation of 14 cyclic products in PEF treatment, two of them being also formed during EC. |
Materia(s): | -Electrocoagulació -Depuració d'aigües residuals -Oxidació electroquímica -Electrocoagulation -Purification of sewage -Electrolytic oxidation |
Derechos: | cc-by-nc-nd (c) Elsevier B.V., 2018
info:eu-repo/semantics/embargoedAccess http://creativecommons.org/licenses/by-nc-nd/3.0/es |
Tipo de documento: | Artículo Artículo - Versión aceptada |
Editor: | Elsevier B.V. |
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