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Title: | H2O2 production at gas-diffusion cathodes made from agarose-derived carbons with different textural properties for acebutolol degradation in chloride media |
Author: | Zhang, Yanyu Daniel, Giorgia Lanzalaco, Sonia Isee, Abdirisak Ahmed Facchin, Alessandro Wang, Aimin Brillas, Enric Durante, Christian Sirés Sadornil, Ignacio |
Keywords: | Biomassa Aigua oxigenada Contaminació de l'aigua Biomass Hydrogen peroxide Water pollution |
Issue Date: | 22-Sep-2021 |
Publisher: | Elsevier B.V. |
Abstract: | The excessive cost, unsustainability or complex production of new highly selective electrocatalysts for H2O2 production, especially noble-metal-based ones, is prohibitive in the water treatment sector. To solve this conundrum, biomass-derived carbons with adequate textural properties were synthesized via agarose doublestep pyrolysis followed by steam activation. A longer steam treatment enhanced the graphitization and porosity, even surpassing commercial carbon black. Steam treatment for 20 min yielded the greatest surface area (1248 m2 g-1), enhanced the mesopore/micropore volume distribution and increased the activity (E1/2 = 0.609 V) and yield of H2O2 (40%) as determined by RRDE. The upgraded textural properties had very positive impact on the ability of the corresponding gas-diffusion electrodes (GDEs) to accumulate H2O2, reaching Faradaic current efficiencies of ~95% at 30 min. Acidic solutions of β-blocker acebutolol were treated by photoelectro- Fenton (PEF) process in synthetic media with and without chloride. In urban wastewater, total drug disappearance was reached at 60 min with almost 50% mineralization after 360 min at only 10 mA cm-2. Up to 14 degradation products were identified in the Cl--containing medium. |
Note: | Reproducció del document publicat a: https://doi.org/10.1016/j.jhazmat.2021.127005 |
It is part of: | Journal of Hazardous Materials, 2021, vol. 423, p. 127005 |
URI: | http://hdl.handle.net/2445/183788 |
Related resource: | https://doi.org/10.1016/j.jhazmat.2021.127005 |
ISSN: | 0304-3894 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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