The DOI matches its Crossref record; 31 of the 31 references it cites were found in a registry or an index.
Magnetite Particles Triggering a Faster and More Robust Syntrophic Pathway of Methanogenic Propionate Degradation
Abstract
Interspecies electron transfer mechanisms between Bacteria and Archaea play a pivotal role during methanogenic degradation of organic matter in natural and engineered anaerobic ecosystems. Growing evidence suggests that in syntrophic communities electron transfer does not rely exclusively on the exchange of diffusible molecules and energy carriers such as hydrogen or formate, rather microorganisms have the capability to exchange metabolic electrons in a more direct manner. Here, we show that supplementation of micrometer-size magnetite (Fe3O4) particles to a methanogenic sludge enhanced (up to 33%) the methane production rate from propionate, a key intermediate in the anaerobic digestion of organic matter and a model substrate to study energy-limited syntrophic communities. The stimulatory effect most probably resulted from the establishment of a direct interspecies electron transfer (DIET), based on magnetite particles serving as electron conduits between propionate-oxidizing acetogens and carbon dioxide-reducing methanogens. Theoretical calculations revealed that DIET allows electrons to be transferred among syntrophic partners at rates which are substantially higher than those attainable via interspecies H2 transfer. Besides the remarkable potential for improving anaerobic digestion, which is a proven biological strategy for renewable energy production, the herein described conduction-based DIET could also have a role in natural methane emissions from magnetite-rich soils and sediments.
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Cites
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Cited by
Extracellular electron transfer mechanisms between microorganisms and minerals
Shi, L., Dong, H., Reguera, G., Beyenal, H., Lu, A., Liu, J., Yu, H.-Q., & Fredrickson, J. K. (2016) · Nature Reviews Microbiology · doi:10.1038/nrmicro.2016.93 · Cited by 1,915
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Methane Production and Conductive Materials: A Critical Review
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Enhancing anaerobic digestion of complex organic waste with carbon-based conductive materials
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Metadata
- Authors
- Cruz Viggi, C., Rossetti, S., Fazi, S., Paiano, P., Majone, M., & Aulenta, F.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-06-16
- Volume
- 48
- Issue
- 13
- Pages
- 7536-7543
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W1988751796
- Cited by
- 698
- References
- 31
- FWCI
- 24.96
- Type
- journal article
- Language
- en
- Open access
- closed
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- Cruz Viggi, C., Rossetti, S., Fazi, S., Paiano, P., Majone, M., & Aulenta, F. (2014). Magnetite Particles Triggering a Faster and More Robust Syntrophic Pathway of Methanogenic Propionate Degradation. Environmental Science & Technology. https://doi.org/10.1021/es5016789
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