Electrochemical analysis of microbial fuel cells based on enriched biofilm communities from freshwater sediment

Agostino, Valeria; Ahmed, Daniyal; Sacco, Adriano; Margaria, Valentina; Armato, Caterina; Quaglio, Marzia

doi:10.1016/j.electacta.2017.03.186

Cited by 33 publications

(9 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The rate of substrate oxidation was very low in the closed SMFC which lead low CTI, indicated by the Nyquist arc with low frequency, boost the electron kinetics shift to anode from substrate. The investigations are persistent with transfer of charge mechanism in which substrate oxidation consider as the rate inhibiting point (Agostino et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Bioremediation and Electricity Generation by Using Open and Closed Sediment Microbial Fuel Cells

et al. 2019

View full text Add to dashboard Cite

The industrial contamination of marine sediments with mercury, silver, and zinc in Penang, Malaysia was studied with bio-remediation coupled with power generation using membrane less open (aerated) and closed (non-aerated) sediment microbial fuel cells (SMFCs). The prototype for this SMFC is very similar to a natural aquatic environment because it is not stimulated externally and an oxygen sparger is inserted in the cathode chamber to create the aerobic environment in the open SMFC and no oxygen supplied in the closed SMFC. The open and closed SMFCs were showed the maximum voltage generation 300.5 mV (77.75 mW/m2) and 202.7 mV (45.04 (mW/m2), respectively. The cyclic voltammetry showed the oxidation peak in open SMFCs at +1.9 μA and reduction peak at -0.3 μA but in closed SMFCs oxidation and reduction peaks were noted at +1.5 μA and -1.0 μA, respectively. The overall impedance (anode, cathode and solution) of closed SMFCs was higher than open SMFCs. The charge transfer impedance showed that the rates of substrate oxidation and reduction were very low in the closed SMFCs than open SMFCs. The Nyquist arc indicated that O2 act as electron acceptor in the open SMFCs and CO2 in the closed SMFCs. The highest remediation efficiency of toxic metals [Hg (II) ions, Zn (II) ions, and Ag (I) ions] in the open SMFCs were 95.03%, 86.69%, and 83.65% in closed SMFCs were 69.53%, 66.57%, and 65.33%, respectively, observed during 60–80 days. The scanning electron microscope and 16S rRNA analysis showed diverse exoelectrogenic community in the open SMFCs and closed SMFCs. The results demonstrated that open SMFCs could be employed for the power generation and bioremediation of pollutants.

show abstract

Section: Discussionmentioning

confidence: 99%

Bioremediation and Electricity Generation by Using Open and Closed Sediment Microbial Fuel Cells

et al. 2019

View full text Add to dashboard Cite

show abstract

“…EIS is an electrochemical technique widely employed for the characterization of materials and devices [40]. In the field of MFCs, it has already been applied to investigate anode [41] and cathode [41,42] properties, as well as whole-device behavior [41]. In this work, the attention was especially focused on biofilm/electrode interface, and on its effect on the total cathodic resistance.…”

Section: Introductionmentioning

confidence: 99%

Biohybrid Cathode in Single Chamber Microbial Fuel Cell

et al. 2018

Self Cite

View full text Add to dashboard Cite

The aim of this work is to investigate the properties of biofilms, spontaneously grown on cathode electrodes of single-chamber microbial fuel cells, when used as catalysts for oxygen reduction reaction (ORR). To this purpose, a comparison between two sets of different carbon-based cathode electrodes is carried out. The first one (Pt-based biocathode) is based on the proliferation of the biofilm onto a Pt/C layer, leading thus to the creation of a biohybrid catalyst. The second set of electrodes (Pt-free biocathode) is based on a bare carbon-based material, on which biofilm grows and acts as the sole catalyst for ORR. Linear sweep voltammetry (LSV) characterization confirmed better performance when the biofilm is formed on both Pt-based and Pt-free cathodes, with respect to that obtained by biofilm-free cathodes. To analyze the properties of spontaneously grown cathodic biofilms on carbon-based electrodes, electrochemical impedance spectroscopy is employed. This study demonstrates that the highest power production is reached when aerobic biofilm acts as a catalyst for ORR in synergy with Pt in the biohybrid cathode.

show abstract

“…In any electrochemical system, the electrode/electrolyte interface is affected when the device is in use and these changes can be observed by EIS technique. As MFC is also a bio‐electrochemical system the EIS may be used to understand the interface behavior in this case also . Figure shows Nyquist plots of the S2 MFC in fresh and post‐operation condition.…”

Section: Resultsmentioning

confidence: 99%

Study of Arrowroot Starch‐Based Polymer Electrolytes and Its Application in MFC

et al. 2019

View full text Add to dashboard Cite

Microbial fuel cell (MFC), a biochemical‐catalyzed system which generates electricity by oxidizing biodegradable organic matter in the presence of either fermentative bacteria or enzymes, is a growing technology for electricity generation. It is a dual functioning technology which not only generates electricity but also treats wastewater, thereby addressing two major problems of the present world. As the technology is an emerging one, there are numerous challenges to be confronted. One of the vital components of the MFC is the proton exchange membrane (PEM), and it is due to the high cost of this membrane that MFC technology is still running at laboratory scale. In the present study, a starch‐based electrolyte film is used as PEM. Electrochemical behavior exhibited by the starch electrolyte is studied and on using it as PEM in MFC it is found to exhibit power density of ≈16 mW m−2 and the current density of ≈85 mA m−2. One of the main advantages of the material is its cost which is approximately INR ≈940 per square foot compared to INR 70 000 per square foot of Nafion (the most popular membrane).

show abstract

Electrochemical analysis of microbial fuel cells based on enriched biofilm communities from freshwater sediment

Cited by 33 publications

References 45 publications

Bioremediation and Electricity Generation by Using Open and Closed Sediment Microbial Fuel Cells

Bioremediation and Electricity Generation by Using Open and Closed Sediment Microbial Fuel Cells

Biohybrid Cathode in Single Chamber Microbial Fuel Cell

Study of Arrowroot Starch‐Based Polymer Electrolytes and Its Application in MFC

Contact Info

Product

Resources

About