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Fluidized ZnO@BCFPs Particle Electrodes for Efficient Degradation and Detoxification of Metronidazole in 3D Electro-Peroxone Process

A novel material of self-shaped ZnO-embedded biomass carbon foam pellets (ZnO@BCFPs) was successfully synthesized and used as fluidized particle electrodes in three-dimensional (3D) electro-peroxone systems for metronidazole degradation. Compared with 3D and 2D + O(3) systems, the energy consumption...

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Autores principales: Yuan, Dan, Wan, Shungang, Liu, Rurong, Wang, Mengmeng, Sun, Lei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9144341/
https://www.ncbi.nlm.nih.gov/pubmed/35629757
http://dx.doi.org/10.3390/ma15103731
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author Yuan, Dan
Wan, Shungang
Liu, Rurong
Wang, Mengmeng
Sun, Lei
author_facet Yuan, Dan
Wan, Shungang
Liu, Rurong
Wang, Mengmeng
Sun, Lei
author_sort Yuan, Dan
collection PubMed
description A novel material of self-shaped ZnO-embedded biomass carbon foam pellets (ZnO@BCFPs) was successfully synthesized and used as fluidized particle electrodes in three-dimensional (3D) electro-peroxone systems for metronidazole degradation. Compared with 3D and 2D + O(3) systems, the energy consumption was greatly reduced and the removal efficiencies of metronidazole were improved in the 3D + O(3) system. The degradation rate constants increased from 0.0369 min(−1) and 0.0337 min(−1) to 0.0553 min(−1), respectively. The removal efficiencies of metronidazole and total organic carbon reached 100% and 50.5% within 60 min under optimal conditions. It indicated that adding ZnO@BCFPs particle electrodes was beneficial to simultaneous adsorption and degradation of metronidazole due to improving mass transfer of metronidazole and forming numerous tiny electrolytic cells. In addition, the process of metronidazole degradation in 3D electro-peroxone systems involved hydroxyethyl cleavage, hydroxylation, nitro-reduction, N-denitrification and ring-opening. The active species of ·OH and ·O(2)(−) played an important role. Furthermore, the acute toxicity LD(50) and the bioconcentration factor of intermediate products decreased with the increasing reaction time.
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spelling pubmed-91443412022-05-29 Fluidized ZnO@BCFPs Particle Electrodes for Efficient Degradation and Detoxification of Metronidazole in 3D Electro-Peroxone Process Yuan, Dan Wan, Shungang Liu, Rurong Wang, Mengmeng Sun, Lei Materials (Basel) Article A novel material of self-shaped ZnO-embedded biomass carbon foam pellets (ZnO@BCFPs) was successfully synthesized and used as fluidized particle electrodes in three-dimensional (3D) electro-peroxone systems for metronidazole degradation. Compared with 3D and 2D + O(3) systems, the energy consumption was greatly reduced and the removal efficiencies of metronidazole were improved in the 3D + O(3) system. The degradation rate constants increased from 0.0369 min(−1) and 0.0337 min(−1) to 0.0553 min(−1), respectively. The removal efficiencies of metronidazole and total organic carbon reached 100% and 50.5% within 60 min under optimal conditions. It indicated that adding ZnO@BCFPs particle electrodes was beneficial to simultaneous adsorption and degradation of metronidazole due to improving mass transfer of metronidazole and forming numerous tiny electrolytic cells. In addition, the process of metronidazole degradation in 3D electro-peroxone systems involved hydroxyethyl cleavage, hydroxylation, nitro-reduction, N-denitrification and ring-opening. The active species of ·OH and ·O(2)(−) played an important role. Furthermore, the acute toxicity LD(50) and the bioconcentration factor of intermediate products decreased with the increasing reaction time. MDPI 2022-05-23 /pmc/articles/PMC9144341/ /pubmed/35629757 http://dx.doi.org/10.3390/ma15103731 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yuan, Dan
Wan, Shungang
Liu, Rurong
Wang, Mengmeng
Sun, Lei
Fluidized ZnO@BCFPs Particle Electrodes for Efficient Degradation and Detoxification of Metronidazole in 3D Electro-Peroxone Process
title Fluidized ZnO@BCFPs Particle Electrodes for Efficient Degradation and Detoxification of Metronidazole in 3D Electro-Peroxone Process
title_full Fluidized ZnO@BCFPs Particle Electrodes for Efficient Degradation and Detoxification of Metronidazole in 3D Electro-Peroxone Process
title_fullStr Fluidized ZnO@BCFPs Particle Electrodes for Efficient Degradation and Detoxification of Metronidazole in 3D Electro-Peroxone Process
title_full_unstemmed Fluidized ZnO@BCFPs Particle Electrodes for Efficient Degradation and Detoxification of Metronidazole in 3D Electro-Peroxone Process
title_short Fluidized ZnO@BCFPs Particle Electrodes for Efficient Degradation and Detoxification of Metronidazole in 3D Electro-Peroxone Process
title_sort fluidized zno@bcfps particle electrodes for efficient degradation and detoxification of metronidazole in 3d electro-peroxone process
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9144341/
https://www.ncbi.nlm.nih.gov/pubmed/35629757
http://dx.doi.org/10.3390/ma15103731
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