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Perchlorate Removal in Microbial Electrochemical Systems With Iron/Carbon Electrodes
Perchlorate removal was tested in the cathode chamber of microbial electrochemical systems (MESs). Dual-chambers MESs were constructed and operated in batch mode with four kinds of cathode materials including Fe/C particles (Fe/C), zero valent iron particles (ZVI), blank carbon felt (CF), and active...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6357934/ https://www.ncbi.nlm.nih.gov/pubmed/30740394 http://dx.doi.org/10.3389/fchem.2019.00019 |
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author | Yang, Qiao Zhang, Fengxiang Zhan, Jingjing Gao, Chao Liu, Minhui |
author_facet | Yang, Qiao Zhang, Fengxiang Zhan, Jingjing Gao, Chao Liu, Minhui |
author_sort | Yang, Qiao |
collection | PubMed |
description | Perchlorate removal was tested in the cathode chamber of microbial electrochemical systems (MESs). Dual-chambers MESs were constructed and operated in batch mode with four kinds of cathode materials including Fe/C particles (Fe/C), zero valent iron particles (ZVI), blank carbon felt (CF), and active carbon (AC). Without external energy supply or perchlorate-reducing microbial pre-enrichment, perchlorate ([Formula: see text]) removal could be achieved in the cathode chambers of MESs at different efficiencies. The highest [Formula: see text] removal rates in these reactors were 18.96 (Fe/C, 100 Ω, 2 days), 15.84 (ZVI, 100 Ω, 2 days), 14.37 (CF, 100 Ω, 3 days), and 19.78 mg/L/day (AC, 100 Ω, 2 days). [Formula: see text] degradation products were mainly Cl(−) and [Formula: see text] , and the total chlorine in the products was lower than the theoretical input. The non-conservation of the total chlorine may be caused by the adsorption and co-precipitation related to the electrode materials. Coulombs and coulombic efficiency calculation showed that electron provided by MESs was partially responsible for [Formula: see text] reduction, for the Fe/C cathode reactors, about a quarter of electron was provided by MESs. |
format | Online Article Text |
id | pubmed-6357934 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-63579342019-02-08 Perchlorate Removal in Microbial Electrochemical Systems With Iron/Carbon Electrodes Yang, Qiao Zhang, Fengxiang Zhan, Jingjing Gao, Chao Liu, Minhui Front Chem Chemistry Perchlorate removal was tested in the cathode chamber of microbial electrochemical systems (MESs). Dual-chambers MESs were constructed and operated in batch mode with four kinds of cathode materials including Fe/C particles (Fe/C), zero valent iron particles (ZVI), blank carbon felt (CF), and active carbon (AC). Without external energy supply or perchlorate-reducing microbial pre-enrichment, perchlorate ([Formula: see text]) removal could be achieved in the cathode chambers of MESs at different efficiencies. The highest [Formula: see text] removal rates in these reactors were 18.96 (Fe/C, 100 Ω, 2 days), 15.84 (ZVI, 100 Ω, 2 days), 14.37 (CF, 100 Ω, 3 days), and 19.78 mg/L/day (AC, 100 Ω, 2 days). [Formula: see text] degradation products were mainly Cl(−) and [Formula: see text] , and the total chlorine in the products was lower than the theoretical input. The non-conservation of the total chlorine may be caused by the adsorption and co-precipitation related to the electrode materials. Coulombs and coulombic efficiency calculation showed that electron provided by MESs was partially responsible for [Formula: see text] reduction, for the Fe/C cathode reactors, about a quarter of electron was provided by MESs. Frontiers Media S.A. 2019-01-24 /pmc/articles/PMC6357934/ /pubmed/30740394 http://dx.doi.org/10.3389/fchem.2019.00019 Text en Copyright © 2019 Yang, Zhang, Zhan, Gao and Liu. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Chemistry Yang, Qiao Zhang, Fengxiang Zhan, Jingjing Gao, Chao Liu, Minhui Perchlorate Removal in Microbial Electrochemical Systems With Iron/Carbon Electrodes |
title | Perchlorate Removal in Microbial Electrochemical Systems With Iron/Carbon Electrodes |
title_full | Perchlorate Removal in Microbial Electrochemical Systems With Iron/Carbon Electrodes |
title_fullStr | Perchlorate Removal in Microbial Electrochemical Systems With Iron/Carbon Electrodes |
title_full_unstemmed | Perchlorate Removal in Microbial Electrochemical Systems With Iron/Carbon Electrodes |
title_short | Perchlorate Removal in Microbial Electrochemical Systems With Iron/Carbon Electrodes |
title_sort | perchlorate removal in microbial electrochemical systems with iron/carbon electrodes |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6357934/ https://www.ncbi.nlm.nih.gov/pubmed/30740394 http://dx.doi.org/10.3389/fchem.2019.00019 |
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