Effect of acclimatization on hexavalent chromium reduction in a biocathode microbial fuel cell

Wu, Xuezhong; Zhu, Xujun; Song, Tian‐shun; Zhang, Lixiong; Jia, Honghua; Wei, Ping

doi:10.1016/j.biortech.2014.12.105

Cited by 99 publications

(39 citation statements)

References 31 publications

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“…For this, the exoelectrogenic biofilm was enriched in the anode compartment and the system was subsequently established using the anode as biocathode. This new method has increased Cr(VI) reduction efficiency by 2.9 times compared to common biocathots (Wu et al, 2015). Other recent studies on Cr(VI) reduction were focused on self-assembled graphene biocathode applications (Song et al, 2016) and on electrode material modification (Wu X. et al, 2016).…”

Section: Alternative Electron Acceptorsmentioning

confidence: 99%

An Overview of Electron Acceptors in Microbial Fuel Cells

2017

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Microbial fuel cells (MFC) have recently received increasing attention due to their promising potential in sustainable wastewater treatment and contaminant removal. In general, contaminants can be removed either as an electron donor via microbial catalyzed oxidization at the anode or removed at the cathode as electron acceptors through reduction. Some contaminants can also function as electron mediators at the anode or cathode. While previous studies have done a thorough assessment of electron donors, cathodic electron acceptors and mediators have not been as well described. Oxygen is widely used as an electron acceptor due to its high oxidation potential and ready availability. Recent studies, however, have begun to assess the use of different electron acceptors because of the (1) diversity of redox potential, (2) needs of alternative and more efficient cathode reaction, and (3) expanding of MFC based technologies in different areas. The aim of this review was to evaluate the performance and applicability of various electron acceptors and mediators used in MFCs. This review also evaluated the corresponding performance, advantages and disadvantages, and future potential applications of select electron acceptors (e.g., nitrate, iron, copper, perchlorate) and mediators.

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Section: Alternative Electron Acceptorsmentioning

confidence: 99%

An Overview of Electron Acceptors in Microbial Fuel Cells

2017

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“…However, direct inversion of the anode to function as the biocathode shortened the acclimitization time to 30 days, with 2.9‐fold increase in Cr(VI) reduction rate. This was ascribed to the dense microbial population and lower Cr(III) precipitates on the cathode, facilitating the use of these rapid renewable biocathodes in real time applications …”

Section: Mfcs With Biocathodesmentioning

confidence: 99%

“…This was ascribed to the dense microbial population and lower Cr(III) precipitates on the cathode, facilitating the use of these rapid renewable biocathodes in real time applications. 55 Modification of carbon-based electrodes by physical or chemical methods and addition of a surface coating enhance their conductivity, electron transfer and biofilm adhesion. 62 HNO 3 -pretreated and NaX zeolite-modified graphite felt proved to be an excellent biocathode material, with electricity generation and Cr(VI) removal 1.7 and 8.2 times higher respectively than those of the unmodified control.…”

Section: Mfcs With Biocathodesmentioning

confidence: 99%

Critical review on microbial fuel cells for concomitant reduction of hexavalent chromium and bioelectricity generation

Aarthy

Rajesh

Thirunavoukkarasu

2019

J of Chemical Tech & Biotech

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Rapid urbanization and industrialization has led to the indiscriminate discharge of heavy metals into the environment. Hexavalent chromium (Cr(VI)), a lethal, carcinogenic and genotoxic heavy metal frequently found in industrial effluent, poses a serious threat to human health. On the other hand, there is a global energy crisis prevalent owing to the scarcity of resources and huge energy demand. An emerging innovative technology which utilizes the biocatalytic activity of microbes for electron production and offers a dual solution for simultaneous reduction of Cr(VI) and generation of bioelectricity is the microbial fuel cell (MFC). The success of the MFC depends on variables such as cell configuration, pH, electrode materials, effect of microbial communities and operational conditions. This review provides a critical insight on the developments in the field of MFCs with abiotic and biotic cathodes, integrated systems, plant‐ and soil‐based designs for treatment of Cr(VI)‐laden effluent and sustainable energy recovery. © 2019 Society of Chemical Industry

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“…To increase microbial concentration and prevent premature cathode passivation due to Cr(III) precipitates during the system set-up, Wu et al [96] proposed an ex situ acclimatization method for Cr(VI)-reducing biocathodes. The electrode was initially enriched with exoelectrogenic biofilm as an MFC anode, and the system was subsequently established using the anode as biocathode.…”

Section: Effects Of Materials Reactor Design and Other Operational mentioning

confidence: 99%

Progress Towards Bioelectrochemical Remediation of Hexavalent Chromium

Beretta

Daghio

Espinoza-Tofalos

et al. 2019

Water

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Chromium is one of the most frequently used metal contaminants. Its hexavalent form Cr(VI), which is exploited in many industrial activities, is highly toxic, is water-soluble in the full pH range, and is a major threat to groundwater resources. Alongside traditional approaches to Cr(VI) treatment based on physical-chemical methods, technologies exploiting the ability of several microorganisms to reduce toxic and mobile Cr(VI) to the less toxic and stable Cr(III) form have been developed to improve the cost-effectiveness and sustainability of remediating hexavalent chromium-contaminated groundwater. Bioelectrochemical systems (BESs), principally investigated for wastewater treatment, may represent an innovative option for groundwater remediation. By using electrodes as virtually inexhaustible electron donors and acceptors to promote microbial oxidation-reduction reactions, in in situ remediation, BESs may offer the advantage of limited energy and chemicals requirements in comparison to other bioremediation technologies, which rely on external supplies of limiting inorganic nutrients and electron acceptors or donors to ensure proper conditions for microbial activity. Electron transfer is continuously promoted/controlled in terms of current or voltage application between the electrodes, close to which electrochemically active microorganisms are located. Therefore, this enhances the options of process real-time monitoring and control, which are often limited in in situ treatment schemes. This paper reviews research with BESs for treating chromium-contaminated wastewater, by focusing on the perspectives for Cr(VI) bioelectrochemical remediation and open research issues.

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Effect of acclimatization on hexavalent chromium reduction in a biocathode microbial fuel cell

Cited by 99 publications

References 31 publications

An Overview of Electron Acceptors in Microbial Fuel Cells

An Overview of Electron Acceptors in Microbial Fuel Cells

Critical review on microbial fuel cells for concomitant reduction of hexavalent chromium and bioelectricity generation

Progress Towards Bioelectrochemical Remediation of Hexavalent Chromium

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