Effects of cathodic electron acceptors and potassium ferricyanide concentrations on the performance of microbial fuel cell

Wei, Liling; Han, Hongliang; Shen, Jing

doi:10.1016/j.ijhydene.2012.05.068

Cited by 125 publications

(53 citation statements)

References 23 publications

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“…Although ionic connection wasn't developed between SS cylinder inner and outer in our research, the result that electron acceptor inuenced on output was similar to conventional BES. 24 That hinted there must be some relationship between inner and outer of the SS, but an appropriate principle wasn't found to explain the phenomenon. However, the BES output was fairly low in relation to traditional BES, so in this research waste treatment was more important destination than current generation.…”

Section: Electrocatalytic Activity Of the Anodementioning

confidence: 99%

Lead ions removal from aqueous solution in a novel bioelectrochemical system with a stainless steel cathode

et al. 2014

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Heavy metal pollution, especially lead pollution in water, has been a growing concern due to the toxicity of lead to human and other beings. According to previous reports, bioelectrochemical systems (BESs) showed significant advantages in heavy metal ions removal, but have not been considered for Pb 2+ removal. In this study, a novel BES with stainless steel cathode distinguished with traditional BESs was employed with mixed culture as biocatalyst for removing Pb 2+ from solution. The results indicated Pb 2+ could be effectively removed and hydrocerussite as the final product confirmed by X-ray diffraction was deposited on the stainless steel cathode. Furthermore, the principle of Pb 2+ removal was deduced based on the experiment of the reduction of ferricyanide in the stainless steel tube-type BES. In brief, we suggested a novel low-cost approach to remove and recover Pb 2+ from Pb 2+ -containing wastewater.

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Section: Electrocatalytic Activity Of the Anodementioning

confidence: 99%

Lead ions removal from aqueous solution in a novel bioelectrochemical system with a stainless steel cathode

et al. 2014

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“…The concentration of Cr (VI) in solution was determined by the 1,5-diphenylcarbohydrazide spectrophotometric method [32]. The detection limit of this method was 0.1 µg·L −1 .…”

Section: Degradation Characterization Of Cr (Vi) and Cathode Productsmentioning

confidence: 99%

Enhanced Performance for Treatment of Cr (VI)-Containing Wastewater by Microbial Fuel Cells with Natural Pyrrhotite-Coated Cathode

Shi

Zhao

Liu

et al. 2017

Water

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Abstract:Here we reported the investigation of enhanced performance for the removal of hexavalent chromium (Cr (VI)) by a new microbial fuel cell (MFC) with natural pyrrhotite-coated cathode. By comparisons of the graphite-cathode, the MFCs equipped with a pyrrhotite-coated cathode generated the maximum power density of 45.4 mW·m −2 that was 1.3 times higher than that of with bare graphite cathode (35.5 mW·m −2 ). Moreover, the Cr (VI) removal efficiency of 97.5% achieved after 4.5 h compared with only 46.1% by graphite cathode MFC. In addition, Cr (VI) removal rate with different initial Cr (VI) concentrations for 10 mg/L and 30 mg/L was investigated and a decreased removal percentage with increasing Cr (VI) concentration was observed. Batches of experiments of different pH values from 3.0 to 9.0 in catholyte were carried out to optimize system performance. The complete Cr (VI) removal was achieved at pH 3.0 and 99.59% of Cr (VI) was removed after 10.5 h, which met the requirement of the Cr (VI) National Emission Standard. When the value of pH was decreasing, the removal rate was obviously increased and Cr (VI) could be removed successfully with a broad pH range indicating pyrrhotite-coated cathode MFC had more extensive usage scope. Furthermore, cathode treatment products were studied by X-ray photoelectron spectroscopy (XPS), Cr 2 O 3 , Cr (III)-acetate were detected on the cathode by the XPS Cr2p spectra and no Cr (VI) founded, indicating that the Cr on the surface of cathode was Cr (III) and Cr (VI) were reduced. On cathode, pyrrhotite not only played a significant role for catalyst of MFCs, but also acted as reactive sites for Cr (VI) reduction. Our research demonstrated that pyrrhotite, an earth-abundant and low-cost natural mineral was promised as an effective cathode material. Which had great potential applications in MFCs for reduction of wastewater containing heavy metals and other environmental contaminants in the future.

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“…The protons generated pass from anode to cathode via the ion exchange membrane . Ferricyanide ([Fe(CN 6 )] 3− ) or permanganate (MnO 4 − ) solutions can act as effective catholytes but are not sustainable Wei et al 2012). …”

Section: Microbial Fuel Cellmentioning

confidence: 99%

Microbial fuel cells in bioelectricity production

Tharali

Sain

Osborne

2016

Frontiers in Life Science

111

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Bioelectricity production involves generation of electricity by anaerobic digestion of organic substrates by microbes. A microbial fuel cell (MFC) is a device that converts chemical energy released as a result of oxidation of complex organic carbon sources which are utilized as substrates by microorganisms to produce electrical energy thereby proving to be an efficient means of sustainable energy production. The electrons released due to the microbial metabolism are captured to maintain a constant power density, without an effective carbon emission in the ecosystem. The various parameters involved in MFC technology toward power generation include maximum power density, coulombic efficiencies and sometimes chemical oxygen demand removal rate which evaluates the effectiveness of the device. Application of microbes toward bioremediation at the same time resulting in generation of electricity makes MFC technology a highly advantageous proposition which can be applied in various sectors of industrial, municipal and agricultural Waste Management. Although the efficiency of MFCs in power generation initially was low, recent modifications in the design, components and working have enhanced the power output to a significant level thereby enabling application of MFCs in various fields including wastewater treatment, biosensors and bioremediation. The following review provides an outline about the components involved, working, modifications and applications of MFC technology for various research and industrial objectives. ARTICLE HISTORY

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Effects of cathodic electron acceptors and potassium ferricyanide concentrations on the performance of microbial fuel cell

Cited by 125 publications

References 23 publications

Lead ions removal from aqueous solution in a novel bioelectrochemical system with a stainless steel cathode

Lead ions removal from aqueous solution in a novel bioelectrochemical system with a stainless steel cathode

Enhanced Performance for Treatment of Cr (VI)-Containing Wastewater by Microbial Fuel Cells with Natural Pyrrhotite-Coated Cathode

Microbial fuel cells in bioelectricity production

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