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Title: | Greywater treatment by anodic oxidation, photoelectro-Fenton and solar photoelectro-Fenton processes: Influence of relevant parameters and toxicity evolution |
Author: | Dos Santos, Paulo Renato De Oliveira Dourados, Maria Eduarda Sirés Sadornil, Ignacio Brillas, Enric Pereira Cavalcante, Rodrigo Cavalheri, Priscila Sabioni Paulo, Paula Loureiro Guelfi, Diego Roberto Vieira Oliveira, Silvio C. deCésar Gozzi, Fábio Machulek Junior, Amílcar |
Keywords: | Oxidació Depuració d'aigües residuals Electroquímica Oxidation Purification of sewage Electrochemistry |
Issue Date: | 21-Nov-2022 |
Publisher: | Elsevier |
Abstract: | In this study, the applicability of factorial design to the treatment of greywater (GW) containing dodecyl-benzene sulfonic acid (LAS) by electrochemical advanced oxidation processes (EAOPs) is demonstrated. At bench scale, anodic oxidation with electrogenerated H2O2 (AO-H2O2) and photoelectro Fenton (PEF) processes were studied following a 23 factorial design with central point insertion, using a first-order mathematical polynomial. In the former process, the combination of a boron-doped diamond (BDD) anode with a carbon-PTFE air-diffusion cathode, both of 3 cm2, yielded a 76% degradation of LAS at 40 mg L-1 along with 52% TOC removal under optimized conditions. The PEF process with 5 mg L-1 Fe2+ at current density of 77.5 mA cm-2 allowed attaining a 63% of LAS degradation and 78% of TOC abatement. The best conditions found for PEF according to the factorial design, in terms of Fe2+ concentration and current density, were applied for the treatment of 10 L of raw GW by solar PEF (SPEF) using a compound parabolic collector (CPC) as solar reactor and a filter-press electrochemical cell. A 70% of LAS removal and a 55% of GW mineralization were attained after 240 min of treatment. Artemia salina toxicity tests were performed with effluents resulting from the different methods under optimum conditions, and the SPEF process was proven to be the most effective and promising EAOP for the reduction of GW toxicity. |
Note: | Reproducció del document publicat a: https://doi.org/10.1016/j.psep.2022.11.058 |
It is part of: | Process Safety and Environmental Protection, 2022, vol. 169, p. 879-895 |
URI: | http://hdl.handle.net/2445/196896 |
Related resource: | https://doi.org/10.1016/j.psep.2022.11.058 |
ISSN: | 0957-5820 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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