Electricity generation by microorganisms in the sediment-water interface of an extreme acidic microcosm
Entity
UAM. Departamento de Biología MolecularPublisher
Elsevier B.V.Date
2011-06-01Citation
10.2436/20.1501.01.137
International Microbiology 14. 2 (2011): 73-81
ISSN
1139-6709 (print); 1618-1905 (online)DOI
10.2436/20.1501.01.137Funded by
This work was supported by the Spanish Ministry of Science and Innovation (project CTQ2009-12649) and the Ramón Areces Foundation (project 20100272)Editor's Version
http://dx.doi.org/10.2436/20.1501.01.137Subjects
Acidophiles; Electricity generation; Microbial fuel cells; Microcosm; Río Tinto; Biología y Biomedicina / BiologíaRights
© Copyright 2012 Elsevier B.V.Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-CompartirIgual 4.0 Internacional.
Abstract
The attachment of microorganisms to electrodes is of great interest for electricity generation in microbial fuel cells (MFC) or other applications in bioelectrochemical systems (BES). In this work, a microcosm of the acidic ecosystem of Río Tinto was built and graphite electrodes were introduced at different points. This allowed the study of electricity generation in the sediment/water interface and the involvement of acidophilic microorganisms as biocatalysts of the anodic and cathodic reactions in a fuel-cell configuration. Current densities and power outputs of up to 3.5 A/m 2 and 0.3 W/m 2, respectively, were measured at pH 3. Microbial analyses of the electrode surfaces showed that Acidiphilium spp., which uses organic compounds as electron donors, were the predominant biocatalysts of the anodic reactions, whereas the aerobic iron oxidizers Acidithiobacillus ferrooxidans and Leptospirillum spp. were detected mainly on the cathode surface
Files in this item
Google Scholar:García-Muñoz, Juan
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Fernández, Víctor Manuel
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De Lacey, Antonio L.
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Malki, Moustafa
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Amils Pibernat, Ricardo
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