Recent advances in soil microbial fuel cells for soil contaminants remediation

Abbas, Syed Zaghum; Rafatullah, Mohd

doi:10.1016/j.chemosphere.2021.129691

Cited by 74 publications

(29 citation statements)

References 86 publications

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“…After this time, the system operated consistently during the experimental procedures, which generally lasted 1 month. Though not specifically monitored, the system stability was expected to last for the same time-scale as that of the individual soil MFCs, which was months for our soil MFC experiments, (data not shown), which is similar to the time-scale of other soil MFC studies [26]. These results correspond to a laboratory setting with a constant temperature (25 • C).…”

Section: Resultssupporting

confidence: 76%

“…We direct the reader to a recent article in which a full assessment of the role of temperature on the power output of individual MFCs used in this study. In this study, power linearly varied with temperature with a slope of almost 0.4 µ W•K −1 , though rapid variations in temperature could result in significant integrated power enhancements over time [23,26]. (a) (b) Figure 9.…”

Section: Resultsmentioning

confidence: 73%

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Bacteria Energy Recovery System Using Natural Soil Bacteria in Microbial Fuel Cells

et al. 2021

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This paper describes a two-cycle bacteria energy recovery system (BERS) to power two embedded sensors: an ultra-low portable pH sensor and a sound sensor. The designed unit can handle up to seven microbial fuel cells (MFCs) to charge a super-capacitor. This allows the BERS to provide a constant 0.14 mW without further electrical components for signal conditioning. The two cycles were driven with a 100 kΩ load and a 10 Hz frequency. The BERS is also self-powered with an integrated start-up unit to be self-activated when the MFCs charge the energy-storing unit after three days. The BERS powered pH sensor has an error below 5% at 25 ∘C and is able to work continuously while being activated for 4 h. The performances of the pH and sound sensors were determined based on a compromise between accuracy and power consumption.

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 73%

Bacteria Energy Recovery System Using Natural Soil Bacteria in Microbial Fuel Cells

et al. 2021

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“…Soil pollution is generally a kind of combined pollution, particularly including organic pollutants and heavy metals (Abbas and Rafatullah 2021). In the case of co‐contamination, the double stress imposed on the soil bacterial communities and produced the synergistic adverse effects, which increased the difficulty of microbial remediation.…”

Section: Discussionmentioning

confidence: 99%

Copper stimulates neonicotinoid insecticide thiacloprid degradation by Ensifer adhaerens TMX‐23

et al. 2021

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Aims Aims of this study are to elucidate the molecular mechanism of copper‐improved thiacloprid (THI) degradation by Ensifer adhaerens TMX‐23 and characterize copper resistance of this strain. Methods and Results Resting cells of E. adhaerens TMX‐23 were used to degrade THI, with formation of THI amide and 98·31% of 0·59 mmol l−1 THI was degraded in 100 min. The addition of copper improved the degradation of THI and showed little inhibitory effects on the growth of E. adhaerens TMX‐23. E. adhaerens TMX‐23 degraded THI to THI amide by nitrile hydratases (NhcA and NhpA). QPCR analysis indicated that the expression of nhpA was up‐regulated in the presence of copper. E. adhaerens TMX‐23 nitrile hydratases were purified, and enzyme assay of NhpA exhibited the highest NHase activity toward THI. The addition of copper activated the activity of NhcA. Soil degradation experiment indicated that E. adhaerens TMX‐23 could quickly eliminate THI residual in copper‐added soil. Conclusions Copper improved THI degradation by E. adhaerens TMX‐23 was attributed to the induced expression of nhpA and activated NhcA. Significance and Impact of the Study This study broadens the investigation of regulatory mechanism of NHase expression and provided theoretical basis for using metal‐resistant microbes to degrade pesticide in heavy metal co‐contaminated environments.

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“…TMFCs have proved to promote degradation also of some persistent organic compounds (POPs) [17]. In fact, the condition of anoxia necessary to favour degradation of these compounds is possible.…”

Section: Tmfc For Remediation Of Organic Pollutantsmentioning

confidence: 99%

“…The final electron acceptors can be oxygen or metal ions, depending on redox potential of a metal ion: ions with low redox potential tend to use oxygen as terminal acceptor of electrons, while ions with high redox potential in the cathode area can compete with oxygen as terminal electron acceptors. These ions, through a reduction, can be transformed from the ionic form to the elementary state and they can precipitate and be easily separated from the soil [17], [31], [32]. The reaction could not occur at the cathode side when the redox potential of heavy metal (e.g.…”

Section: Tmfc For Remediation Of Inorganic Pollutantsmentioning

confidence: 99%

Environmental Remediation and Possible Use of Terrestrial Microbial Fuel Cells

Aimola

Gagliardi

Pietrelli

et al. 2021

WIT Transactions on the Built Environment

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Many soils contain a wide number of organic and inorganic chemicals and potential toxic elements due to industrial, agricultural and numerous anthropogenic activities. The recovery of polluted sites is an urgent need to be addressed and the development of innovative remediation technologies, which exploit nature-based solutions, is strongly encouraged, in line with the new EU Circular Economy Action Plan. Terrestrial microbial fuel cells (TMFCs) can be a valuable tool for recovering soils polluted by various organic and inorganic contaminants. TMFCs benefit from capabilities of microbial biofilms developed on the electrodes, which use the terminals as catalysts for metabolic activities, including contaminant degradation. This process produces energy, thanks to conversion of chemical bond energy (stored in the bonds of organic compounds) into electrical ones. This work describes construction materials, remediation capabilities and technology of the TMFCs, reporting the last advances in TMFCs such as soil-based reactors or in combination with plants (plant microbial fuel cell (PMFC)). Some aspects related to microbiological activities for pollutant biodegradation, plant-microbial interactions, energy production, and fields of application will be shown. Finally, abiotic factors which can improve bioremediation activities are also considered. Furthermore, limitations and issues for large-scale applications, as well as for stacking and scaling-up are discussed.

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Recent advances in soil microbial fuel cells for soil contaminants remediation

Cited by 74 publications

References 86 publications

Bacteria Energy Recovery System Using Natural Soil Bacteria in Microbial Fuel Cells

Bacteria Energy Recovery System Using Natural Soil Bacteria in Microbial Fuel Cells

Copper stimulates neonicotinoid insecticide thiacloprid degradation by Ensifer adhaerens TMX‐23

Environmental Remediation and Possible Use of Terrestrial Microbial Fuel Cells

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