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Performance and mechanism of methylene blue degradation by an electrochemical process
An exciting electrochemical oxidation (EO) process has been developed. Compared with electro-Fenton (EF) and electro-coagulation (EC) processes, this process had more advantages in the degradation of methylene blue. It is observed that methylene blue can be quickly degraded by EO, in which an iron r...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9055207/ https://www.ncbi.nlm.nih.gov/pubmed/35516220 http://dx.doi.org/10.1039/d0ra03963b |
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author | Teng, Xiaolei Li, Junfeng Wang, Zhaoyang Wei, Zhen Chen, Cuizhong Du, Keqing Zhao, Chun Yang, Guang Li, Yun |
author_facet | Teng, Xiaolei Li, Junfeng Wang, Zhaoyang Wei, Zhen Chen, Cuizhong Du, Keqing Zhao, Chun Yang, Guang Li, Yun |
author_sort | Teng, Xiaolei |
collection | PubMed |
description | An exciting electrochemical oxidation (EO) process has been developed. Compared with electro-Fenton (EF) and electro-coagulation (EC) processes, this process had more advantages in the degradation of methylene blue. It is observed that methylene blue can be quickly degraded by EO, in which an iron rod is used as an anode, graphite is used as a cathode, and fly ash–red mud particles are used as particle electrodes. Compared to EC and EF processes that are affected by specific pH values, EO has excellent performance in the pH range of 3.0–11.0. In addition, the electric energy consumption (EEC) of EF, EC and EO is 81.51, 36.55 and 21.35 kW h m(−3) respectively, suggesting EO is more economical. The free radical scavenging mechanism of i-PrOH is studied, and the contribution of EC, EF and fly ash–red mud particle electrodes in EO is inferred. Particle electrodes before and after use are characterized by SEM, EDS and BET to illustrate the role of particle electrodes in the EO system. Analysis of flocs and solutions by FTIR and GC-MS proves that EO can effectively degrade methylene blue, and the degradation route of methylene blue is speculated. The particle electrode dissolution experiment shows that the prepared fly ash–red mud particle electrode is considered to be suitable and safe for wastewater treatment. Finally, in actual surface water experiments, the EO process still has great potential. |
format | Online Article Text |
id | pubmed-9055207 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90552072022-05-04 Performance and mechanism of methylene blue degradation by an electrochemical process Teng, Xiaolei Li, Junfeng Wang, Zhaoyang Wei, Zhen Chen, Cuizhong Du, Keqing Zhao, Chun Yang, Guang Li, Yun RSC Adv Chemistry An exciting electrochemical oxidation (EO) process has been developed. Compared with electro-Fenton (EF) and electro-coagulation (EC) processes, this process had more advantages in the degradation of methylene blue. It is observed that methylene blue can be quickly degraded by EO, in which an iron rod is used as an anode, graphite is used as a cathode, and fly ash–red mud particles are used as particle electrodes. Compared to EC and EF processes that are affected by specific pH values, EO has excellent performance in the pH range of 3.0–11.0. In addition, the electric energy consumption (EEC) of EF, EC and EO is 81.51, 36.55 and 21.35 kW h m(−3) respectively, suggesting EO is more economical. The free radical scavenging mechanism of i-PrOH is studied, and the contribution of EC, EF and fly ash–red mud particle electrodes in EO is inferred. Particle electrodes before and after use are characterized by SEM, EDS and BET to illustrate the role of particle electrodes in the EO system. Analysis of flocs and solutions by FTIR and GC-MS proves that EO can effectively degrade methylene blue, and the degradation route of methylene blue is speculated. The particle electrode dissolution experiment shows that the prepared fly ash–red mud particle electrode is considered to be suitable and safe for wastewater treatment. Finally, in actual surface water experiments, the EO process still has great potential. The Royal Society of Chemistry 2020-06-29 /pmc/articles/PMC9055207/ /pubmed/35516220 http://dx.doi.org/10.1039/d0ra03963b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Teng, Xiaolei Li, Junfeng Wang, Zhaoyang Wei, Zhen Chen, Cuizhong Du, Keqing Zhao, Chun Yang, Guang Li, Yun Performance and mechanism of methylene blue degradation by an electrochemical process |
title | Performance and mechanism of methylene blue degradation by an electrochemical process |
title_full | Performance and mechanism of methylene blue degradation by an electrochemical process |
title_fullStr | Performance and mechanism of methylene blue degradation by an electrochemical process |
title_full_unstemmed | Performance and mechanism of methylene blue degradation by an electrochemical process |
title_short | Performance and mechanism of methylene blue degradation by an electrochemical process |
title_sort | performance and mechanism of methylene blue degradation by an electrochemical process |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9055207/ https://www.ncbi.nlm.nih.gov/pubmed/35516220 http://dx.doi.org/10.1039/d0ra03963b |
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