Nitrate removal in iron sulfide-driven autotrophic denitrification biofilter : Biochemical and chemical transformation pathways and its underlying microbial mechanism
Copyright © 2023 The Authors. Published by Elsevier B.V. All rights reserved..
Iron sulfides-based autotrophic denitrification (IAD) is effective for treating nitrate-contaminated wastewater. However, the complex nitrate transformation pathways coupled with sulfur and iron cycles in IADs are still unclear. In this study, two columns (abiotic vs biotic) with iron sulfides (FeS) as the packing materials were constructed and operated continuously. In the abiotic column, FeS chemically reduced nitrate to ammonium under the ambient condition; this chemical reduction reaction pathway was spontaneous and has been overlooked in IAD reactors. In the biotic column (IAD biofilter), the complex nitrogen-transformation network was composed of chemical reduction, autotrophic denitrification, dissimilatory nitrate reduction to ammonium (DNRA) and sulfate reducing ammonium oxidation (Sulfammox). Metagenomic analysis and XPS characterization of the IAD biofilter further validated the roles of functional microbial communities (e.g., Acidovorax, Diaphorobacter, Desulfuromonas) in nitrate reduction process coupled with iron and sulfur cycles. This study gives an in-depth insight into the nitrogen transformations in IAD system and provides fundamental evidence about the underlying microbial mechanism for its further application in biological nitrogen removal.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:901 |
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| Enthalten in: |
The Science of the total environment - 901(2023) vom: 25. Nov., Seite 165908 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Bai, Yang [VerfasserIn] |
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| Links: |
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| Themen: |
Autotrophic denitrification |
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| Anmerkungen: |
Date Revised 13.10.2023 published: Print-Electronic Citation Status Publisher |
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| doi: |
10.1016/j.scitotenv.2023.165908 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM360430163 |
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| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status Publisher | ||
| 520 | |a Copyright © 2023 The Authors. Published by Elsevier B.V. All rights reserved. | ||
| 520 | |a Iron sulfides-based autotrophic denitrification (IAD) is effective for treating nitrate-contaminated wastewater. However, the complex nitrate transformation pathways coupled with sulfur and iron cycles in IADs are still unclear. In this study, two columns (abiotic vs biotic) with iron sulfides (FeS) as the packing materials were constructed and operated continuously. In the abiotic column, FeS chemically reduced nitrate to ammonium under the ambient condition; this chemical reduction reaction pathway was spontaneous and has been overlooked in IAD reactors. In the biotic column (IAD biofilter), the complex nitrogen-transformation network was composed of chemical reduction, autotrophic denitrification, dissimilatory nitrate reduction to ammonium (DNRA) and sulfate reducing ammonium oxidation (Sulfammox). Metagenomic analysis and XPS characterization of the IAD biofilter further validated the roles of functional microbial communities (e.g., Acidovorax, Diaphorobacter, Desulfuromonas) in nitrate reduction process coupled with iron and sulfur cycles. This study gives an in-depth insight into the nitrogen transformations in IAD system and provides fundamental evidence about the underlying microbial mechanism for its further application in biological nitrogen removal | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Autotrophic denitrification | |
| 650 | 4 | |a Fe cycling | |
| 650 | 4 | |a Iron sulfides | |
| 650 | 4 | |a N cycling | |
| 650 | 4 | |a Nitrogen transformation | |
| 650 | 4 | |a S cycling | |
| 700 | 1 | |a Hu, Huanhuan |e verfasserin |4 aut | |
| 700 | 1 | |a Lee, Po-Heng |e verfasserin |4 aut | |
| 700 | 1 | |a Zhussupbekova, Ainur |e verfasserin |4 aut | |
| 700 | 1 | |a Shvets, Igor V |e verfasserin |4 aut | |
| 700 | 1 | |a Du, Bang |e verfasserin |4 aut | |
| 700 | 1 | |a Terada, Akihiko |e verfasserin |4 aut | |
| 700 | 1 | |a Zhan, Xinmin |e verfasserin |4 aut | |
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