Unveiling the biointerfaces characteristics and removal pathways of Cr(Ⅵ) in Bacillus cereus FNXJ1-2-3 for the Cr(Ⅵ)-to-Cr(0) conversion
Copyright © 2024 Elsevier Inc. All rights reserved..
Although less toxic than hexavalent chromium, Cr (Ⅲ) species still pose a threat to human health. The Cr (Ⅵ) should be converted to Cr (0) instead of Cr (Ⅲ), which is still involved in biological detoxification filed. Herein, for the first time, it was found that Cr(Ⅵ) can be reduced into Cr(0) by Bacillus cereus FNXJ1-2-3, a way to completely harmless treatment of Cr(Ⅵ). The bacterial strain exhibited excellent performance in the reduction, sorption, and accumulation of Cr(Ⅵ) and Cr (Ⅲ). XPS etching characterization inferred that the transformation of Cr(Ⅵ) into Cr(0) followed a reduction pathway of Cr(Ⅵ)→Cr (Ⅲ)→metallic Cr(0), in which at least two secretory chromium reductases (ECrⅥ→Ⅲ and ECrⅢ→0) worked. Under the optimum condition, the yield ratio of Cr(0)/Cr (Ⅲ) reached 33.90%. In addition, the interfacial interactions, ion channels, chromium reductases, and external electron donors also contributed to the Cr(Ⅵ)/Cr(0) transformation. Findings of this study indicate that Bacillus cereus FNXJ1-2-3 is a promising bioremediation agent for Cr(Ⅵ) pollution control.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:251 |
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| Enthalten in: |
Environmental research - 251(2024), Pt 2 vom: 08. März, Seite 118663 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Li, Zhaoxia [VerfasserIn] |
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| Links: |
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| Themen: |
Bacillus cereus FNXJ1-2-3 |
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| Anmerkungen: |
Date Revised 20.03.2024 published: Print-Electronic Citation Status Publisher |
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| doi: |
10.1016/j.envres.2024.118663 |
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| funding: |
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NLM369503953 |
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| 245 | 1 | 0 | |a Unveiling the biointerfaces characteristics and removal pathways of Cr(Ⅵ) in Bacillus cereus FNXJ1-2-3 for the Cr(Ⅵ)-to-Cr(0) conversion |
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| 520 | |a Copyright © 2024 Elsevier Inc. All rights reserved. | ||
| 520 | |a Although less toxic than hexavalent chromium, Cr (Ⅲ) species still pose a threat to human health. The Cr (Ⅵ) should be converted to Cr (0) instead of Cr (Ⅲ), which is still involved in biological detoxification filed. Herein, for the first time, it was found that Cr(Ⅵ) can be reduced into Cr(0) by Bacillus cereus FNXJ1-2-3, a way to completely harmless treatment of Cr(Ⅵ). The bacterial strain exhibited excellent performance in the reduction, sorption, and accumulation of Cr(Ⅵ) and Cr (Ⅲ). XPS etching characterization inferred that the transformation of Cr(Ⅵ) into Cr(0) followed a reduction pathway of Cr(Ⅵ)→Cr (Ⅲ)→metallic Cr(0), in which at least two secretory chromium reductases (ECrⅥ→Ⅲ and ECrⅢ→0) worked. Under the optimum condition, the yield ratio of Cr(0)/Cr (Ⅲ) reached 33.90%. In addition, the interfacial interactions, ion channels, chromium reductases, and external electron donors also contributed to the Cr(Ⅵ)/Cr(0) transformation. Findings of this study indicate that Bacillus cereus FNXJ1-2-3 is a promising bioremediation agent for Cr(Ⅵ) pollution control | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Bacillus cereus FNXJ1-2-3 | |
| 650 | 4 | |a Chromium reductases | |
| 650 | 4 | |a Chromium species | |
| 650 | 4 | |a Cr(Ⅵ) | |
| 650 | 4 | |a Removal pathways | |
| 700 | 1 | |a Cui, Entian |e verfasserin |4 aut | |
| 700 | 1 | |a Gu, Naipeng |e verfasserin |4 aut | |
| 700 | 1 | |a Ma, Weixing |e verfasserin |4 aut | |
| 700 | 1 | |a Guo, Qingyuan |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Xuan |e verfasserin |4 aut | |
| 700 | 1 | |a Jin, Jianxiang |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Qun |e verfasserin |4 aut | |
| 700 | 1 | |a Ding, Cheng |e verfasserin |4 aut | |
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