Title |
Microbial Selenate Reduction Driven by a Denitrifying Anaerobic Methane Oxidation Biofilm
|
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Published in |
Environmental Science & Technology, March 2018
|
DOI | 10.1021/acs.est.7b05046 |
Pubmed ID | |
Authors |
Jing-Huan Luo, Hui Chen, Shihu Hu, Chen Cai, Zhiguo Yuan, Jianhua Guo |
Abstract |
Anaerobic oxidation of methane (AOM) plays a crucial role in controlling the flux of methane from anoxic environments. Sulfate-, nitrite-, nitrate-, and iron-dependent methane oxidation processes have been considered to be responsible for the AOM activities in anoxic niches. Here, we report nitrate-reducing AOM microorganisms, enriched in a membrane biofilm bioreactor (MBfR), are able to couple selenate reduction to AOM. According to ion chromatography (IC), X-ray photoelectron spectroscopy (XPS) and long-term bioreactor performance, we reveal that soluble selenate was reduced to nanoparticle elemental selenium. High-throughput 16S rRNA gene sequencing indicates that Candidatus Methanoperedens and Candidatus Methylomirabilis remained the only known methane-oxidising microorganisms after nitrate was switched to selenate, suggesting that these organisms could couple anaerobic methane oxidation to selenate reduction. Our findings suggest a possible link between the biogeochemical selenium and methane cycles. |
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Country | Count | As % |
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Australia | 2 | 18% |
Estonia | 1 | 9% |
France | 1 | 9% |
United States | 1 | 9% |
Netherlands | 1 | 9% |
Unknown | 5 | 45% |
Demographic breakdown
Type | Count | As % |
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Scientists | 7 | 64% |
Members of the public | 4 | 36% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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Unknown | 74 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Ph. D. Student | 24 | 32% |
Researcher | 7 | 9% |
Student > Bachelor | 6 | 8% |
Student > Master | 5 | 7% |
Student > Doctoral Student | 4 | 5% |
Other | 9 | 12% |
Unknown | 19 | 26% |
Readers by discipline | Count | As % |
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Environmental Science | 17 | 23% |
Unspecified | 8 | 11% |
Agricultural and Biological Sciences | 6 | 8% |
Biochemistry, Genetics and Molecular Biology | 5 | 7% |
Chemical Engineering | 4 | 5% |
Other | 14 | 19% |
Unknown | 20 | 27% |