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Characterization of anode and anolyte community growth and the impact of impedance in a microbial fuel cell

Overview of attention for article published in BMC Biotechnology, December 2014
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  • In the top 25% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (82nd percentile)

Mentioned by

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1 news outlet

Citations

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44 Dimensions

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82 Mendeley
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Title
Characterization of anode and anolyte community growth and the impact of impedance in a microbial fuel cell
Published in
BMC Biotechnology, December 2014
DOI 10.1186/s12896-014-0102-z
Pubmed ID
Authors

Diana Sanchez-Herrera, Daniella Pacheco-Catalan, Ruby Valdez-Ojeda, Blondy Canto-Canche, Xochitl Dominguez-Benetton, Jorge Domínguez-Maldonado, Liliana Alzate-Gaviria

Abstract

BackgroundA laboratory-scale two-chamber microbial fuel cell employing an aerated cathode with no catalyst was inoculated with mixed inoculum and acetate as the carbon source.Electrochemical impedance spectroscopy (EIS) was used to study the behavior of the MFC during initial biofilm (week 1) and maximum power density (week 20). EIS were performed on the anode chamber, biofilm (without anolyte) and anolyte (without biofilm). Nyquist plots of the EIS data were fitted with two equivalent electrical circuits to estimate the contributions of intrinsic resistances to the overall internal MFC impedance at weeks 1 and 20, respectively.ResultsThe results showed that the system tended to increase power density from 15¿±¿3 (week 1) to 100¿±¿11 mW/m2 (week 20) and current density 211¿±¿7 (week 1) to 347¿±¿12 mA/m2 (week 20). The Samples were identified by pyrosequencing of the 16S rRNA gene and showed that initial inoculum (week 1) was constituted by Proteobacteria (40%), Bacteroidetes (22%) and Firmicutes (18%). At week 20, Proteobacterial species were predominant (60%) for electricity generation in the anode biofilm, being 51% Rhodopseudomonas palustris. Meanwhile on anolyte, Firmicutes phylum was predominant with Bacillus sp.This study proved that under the experimental conditions used there is an important contribution from the interaction of the biofilm and the anolyte on cell performance. Table 1 presents a summary of the specific influence of each element of the system under study.Conclusions The results showed certain members of the bacterial electrode community increased in relative abundance from the initial inoculum. For example, Proteobacterial species are important for electricity generation in the anode biofilms and Firmicutes phylum was predominant on anolyte to transfer electron. R1 is the same in the three systems and no variation is observed over time. The biofilm makes a significant contribution to the charge transfer processes at the electrode (R2 and Cdl) and, consequently, on the performance of the anode chamber. The biofilm can act as a barrier which reduces diffusion of the anolyte towards the electrode, all the while behaving like a porous material. The anolyte and its interaction with the biofilm exert a considerable influence on diffusion processes, given that it presents the highest values for Rd which increased at week 20.

Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 82 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United Kingdom 1 1%
Malaysia 1 1%
Italy 1 1%
Unknown 79 96%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 23 28%
Student > Master 15 18%
Researcher 10 12%
Student > Doctoral Student 8 10%
Other 4 5%
Other 10 12%
Unknown 12 15%
Readers by discipline Count As %
Environmental Science 13 16%
Engineering 12 15%
Chemistry 10 12%
Agricultural and Biological Sciences 9 11%
Biochemistry, Genetics and Molecular Biology 8 10%
Other 14 17%
Unknown 16 20%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 7. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 10 December 2014.
All research outputs
#4,168,073
of 22,774,233 outputs
Outputs from BMC Biotechnology
#213
of 935 outputs
Outputs of similar age
#60,097
of 361,040 outputs
Outputs of similar age from BMC Biotechnology
#16
of 25 outputs
Altmetric has tracked 22,774,233 research outputs across all sources so far. Compared to these this one has done well and is in the 80th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 935 research outputs from this source. They typically receive more attention than average, with a mean Attention Score of 7.7. This one has gotten more attention than average, scoring higher than 73% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 361,040 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 82% of its contemporaries.
We're also able to compare this research output to 25 others from the same source and published within six weeks on either side of this one. This one is in the 8th percentile – i.e., 8% of its contemporaries scored the same or lower than it.