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Title: | Removal of bisphenol A from acidic sulfate medium and urban wastewater using persulfate activated with electroregenerated Fe2+ |
Author: | Dos Santos, Alexsandro Jhones Sirés Sadornil, Ignacio Brillas, Enric |
Keywords: | Depuració d'aigües residuals Contaminants emergents en l'aigua Purification of sewage Emerging contaminants in water |
Issue Date: | 7-Sep-2020 |
Publisher: | Elsevier Ltd |
Abstract: | Model solutions of bisphenol A (BPA) in 0.050 M Na2SO4 at pH 3.0 have been treated by the electro/Fe2+/persulfate process. The activation of 5.0 mM persulfate with 0.20 mM Fe2+ yielded a mixture of sulfate radical anion (SO4*- ) and * OH, although quenching tests revealed the prevalence of the former species as the main oxidizing agent. In trials run in an IrO2/carbon-felt cell, 98.4% degradation was achieved alongside 61.8% mineralization. The energy consumption was 253.9 kWh (kg TOC) -1, becoming more cost-effective as compared to cells with boron-doped diamond and Pt anodes. Carbon felt outperformed stainless steel as cathode because of the faster Fe2+ regeneration. All BPA concentration decays agreed with a pseudo-fist-order kinetics. The effect of persulfate, Fe2+ and BPA concentrations as well as of the applied current on the degradation process was assessed. Two dehydroxylated and three hydroxylated monobenzenic by-products appeared upon SO4*- and * OH attack, respectively. The analogous treatment of BPA spiked into urban wastewater yielded a faster degradation and mineralization due to the cogeneration of HClO and the larger *OH production as SO4*- reacted with Cl- . |
Note: | Versió postprint del document publicat a: https://doi.org/10.1016/j.chemosphere.2020.128271 |
It is part of: | Chemosphere, 2020, vol. 263, num. 128271 |
URI: | http://hdl.handle.net/2445/170748 |
Related resource: | https://doi.org/10.1016/j.chemosphere.2020.128271 |
ISSN: | 0045-6535 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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