Microbial degradation mechanism and pathway of the insecticide thiamethoxam by isolated Bacillus Cereus from activated sludge
Copyright © 2024 Elsevier Inc. All rights reserved..
The high water solubility and ecotoxicity of thiamethoxam (TMX) is a potential hazard to ecosystems and human health. Here, a strain of Bacillus cereus with high TMX degradation activity was isolated from the sediment of the A2O process in the wastewater treatment plant and was able to utilize TMX as its sole carbon source. Under different environmental conditions, the degradation efficiency of TMX by Bacillus cereus-S1 (strain S1) ranged from 41.0% to 68.9% after 216 h. The optimum degradation conditions were DO = 3.5 mg/L and pH 9.0. The addition of an appropriate carbon-to-nitrogen ratio could accelerate the degradation of TMX. A plausible biodegradation pathway has been proposed based on the identified metabolites and their corresponding degradation pathways. TMX can be directly converted into Clothianidin (CLO), TMX-dm-hydroxyl and TMX-Urea by a series of reactions such as demethylation, oxadiazine ring cleavage and C=N substitution by hydroxy group. The main products were TMX-dm-hydroxyl and TMX-Urea, the amount of CLO production is relatively small. This study aims to provide a new approach for efficient degradation of TMX; furthermore, strain S1 is a promising biological source for in situ remediation of TMX contamination.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:246 |
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| Enthalten in: |
Environmental research - 246(2024) vom: 01. März, Seite 117929 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Xiang, Xuezhu [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 18.03.2024 Date Revised 18.03.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.envres.2023.117929 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM366486152 |
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| 245 | 1 | 0 | |a Microbial degradation mechanism and pathway of the insecticide thiamethoxam by isolated Bacillus Cereus from activated sludge |
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| 520 | |a The high water solubility and ecotoxicity of thiamethoxam (TMX) is a potential hazard to ecosystems and human health. Here, a strain of Bacillus cereus with high TMX degradation activity was isolated from the sediment of the A2O process in the wastewater treatment plant and was able to utilize TMX as its sole carbon source. Under different environmental conditions, the degradation efficiency of TMX by Bacillus cereus-S1 (strain S1) ranged from 41.0% to 68.9% after 216 h. The optimum degradation conditions were DO = 3.5 mg/L and pH 9.0. The addition of an appropriate carbon-to-nitrogen ratio could accelerate the degradation of TMX. A plausible biodegradation pathway has been proposed based on the identified metabolites and their corresponding degradation pathways. TMX can be directly converted into Clothianidin (CLO), TMX-dm-hydroxyl and TMX-Urea by a series of reactions such as demethylation, oxadiazine ring cleavage and C=N substitution by hydroxy group. The main products were TMX-dm-hydroxyl and TMX-Urea, the amount of CLO production is relatively small. This study aims to provide a new approach for efficient degradation of TMX; furthermore, strain S1 is a promising biological source for in situ remediation of TMX contamination | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Bacillus cereus | |
| 650 | 4 | |a Biodegradation pathway | |
| 650 | 4 | |a Degradation intermediate | |
| 650 | 4 | |a Insecticide | |
| 650 | 4 | |a Thiamethoxam | |
| 650 | 7 | |a Thiamethoxam |2 NLM | |
| 650 | 7 | |a 747IC8B487 |2 NLM | |
| 650 | 7 | |a Insecticides |2 NLM | |
| 650 | 7 | |a Sewage |2 NLM | |
| 650 | 7 | |a Nitro Compounds |2 NLM | |
| 650 | 7 | |a Oxazines |2 NLM | |
| 650 | 7 | |a clothianidin |2 NLM | |
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| 650 | 7 | |a 8W8T17847W |2 NLM | |
| 650 | 7 | |a Neonicotinoids |2 NLM | |
| 650 | 7 | |a Guanidines |2 NLM | |
| 650 | 7 | |a Thiazoles |2 NLM | |
| 700 | 1 | |a Xie, Yue |e verfasserin |4 aut | |
| 700 | 1 | |a Tian, Di |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Zhenguo |e verfasserin |4 aut | |
| 700 | 1 | |a Yi, Xiaohui |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Ziyan |e verfasserin |4 aut | |
| 700 | 1 | |a Huang, Minzhi |e verfasserin |4 aut | |
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