Electroactive Bacteria in Natural Ecosystems and Their Applications in Microbial Fuel Cells for Bioremediation: A Review

Garbini, Gian Luigi; Caracciolo, Anna Barra; Grenni, Paola

doi:10.3390/microorganisms11051255

Cited by 28 publications

(10 citation statements)

References 148 publications

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“…Therefore, it can be inferred that additional factors contribute to the observed differences. Electroactive bacteria (EAB) are natural microorganisms, primarily belonging to the Bacteria and Archaea domains, which inhabit various environments such as water, soil, and sediment 89 . These microbes possess the unique ability to engage in electrical interactions, either among themselves or with their extracellular surroundings.…”

Section: Resultsmentioning

confidence: 99%

Biodegradable polylactic acid emulsion ink based on carbon nanotubes and silver for printed pressure sensors

Najafi,

Forestier,

Safarpour

et al. 2024

Sci Rep

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Investigating biodegradable and biocompatible materials for electronic applications can lead to tangible outcomes such as developing green-electronic devices and reducing the amount of e-waste. The proposed emulsion-based conducting ink formulation takes into consideration circular economy and green principles throughout the entire process, from the selection of materials to the production process. The ink is formulated using the biopolymer polylactic acid dissolved in a sustainable solvent mixed with water, along with conductive carbon nanotubes (CNTs) and silver flakes as fillers. Hybrid conductive fillers can lower the percolation threshold of the ink and the production costs, while maintaining excellent electrical properties. The coating formed after the deposition of the ink, undergoes isothermal treatment at different temperatures and durations to improve its adhesion and electrical properties. The coating’s performance was evaluated by creating an eight-finger interdigitated sensor using a Voltera PCB printer. The sensor demonstrates exceptional performance when exposed to various loading and unloading pressures within the 0.2–500.0 kPa range. The results show a consistent correlation between the change in electrical resistance and the stress caused by the applied load. The ink is biodegradable in marine environments, which helps avoiding its accumulation in the ecosystem over time.

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Section: Resultsmentioning

confidence: 99%

Biodegradable polylactic acid emulsion ink based on carbon nanotubes and silver for printed pressure sensors

Najafi,

Forestier,

Safarpour

et al. 2024

Sci Rep

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show abstract

“…These have the capability to interact with a variety of insoluble electron acceptors and donors. EET microorganisms have opened a vast array of electrically-based technical applications and contributed to new ideas surrounding sustainability (e.g., biobatteries, pollution remediation, electrosynthesis and water reclamation) [69,70].…”

Section: Electric Microbes and Electrical Field Effectsmentioning

confidence: 99%

Microbes and Sustainable Living: Focus on Electric and Magnetic Fields

Dietert,

Dietert

2024

Preprint

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Among earth’s microbial populations are the genes, functional capacities, generational memory and sentient cognition that enable microorganisms to adapt and thrive in the full range of ecological conditions found on planet earth. In prior sequential publications, we considered fundamental properties (e.g., use of and responses to sound, light, vibrations) and features of microorganisms that cause them to be critical co-partners of human and other holobionts as well as the potential benefits for humanity that can be gained by fully applying quantum-related and novel capacities of microbial life. In this narrative review we: 1) discuss key concepts concerning a microbially-enhanced and sustainable future, and 2) focus on electric- and magnetic- based features of microorganisms that make them pivotal for myriad benefits ranging from beyond pharma-based health and wellness to free- and/or renewable energy and restorative agriculture to improved human networking. While the benefits are many, the risks posed by hazardous electric or magnetic field exposures to both holobionts and microbial communities are significant. This review concludes that microbes and their remarkable capacities offer both humanity and the planet a much brighter future if we reverse the demonization of microbes and wanton microbiome degradation that has predominated much of the past century.

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“…Extracellular electron transfer (EET) is the process whereby some microorganisms exchange electrons with the outside environment and is the prominent characteristic that defines an electroactive (EET-capable) microorganism [ 1 ]. EET-capable microorganisms were first noted and reported by their ability to perform anaerobic respiration using insoluble metal oxides as electron acceptors [ 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Nonelectroactive clostridium obtains extracellular electron transfer-capability after forming chimera with Geobacter

Liu,

Ye,

Yang

et al. 2024

ISME Communications

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Extracellular electron transfer (EET) of microorganisms is a major driver of the microbial growth and metabolism, including reactions involved in the cycling of C, N, and Fe in anaerobic environments such as soils and sediments. Understanding the mechanisms of EET, as well as knowing which organisms are EET-capable (or can become so) is fundamental to electromicrobiology and geomicrobiology. In general, Gram-positive bacteria very seldomly perform EET due to their thick non-conductive cell wall. Here, we report that a Gram-positive Clostridium intestinale (C.i) attained EET-capability for ethanol metabolism only after forming chimera with electroactive Geobacter sulfurreducens (G.s). Mechanism analyses demonstrated that the EET was possible after the cell fusion of the two species was achieved. Under these conditions, the ethanol metabolism pathway of C.i was integrated by the EET pathway of G.s, by which achieved the oxidation of ethanol for the subsequent reduction of extracellular electron acceptors in the coculture. Our study displays a new approach to perform EET for Gram-positive bacteria via recruiting the EET pathway of an electroactive bacterium, which suggests a previously unanticipated prevalence of EET in the microbial world. These findings also provide new perspectives to understand the energetic coupling between bacterial species and the ecology of interspecies mutualisms.

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Electroactive Bacteria in Natural Ecosystems and Their Applications in Microbial Fuel Cells for Bioremediation: A Review

Cited by 28 publications

References 148 publications

Biodegradable polylactic acid emulsion ink based on carbon nanotubes and silver for printed pressure sensors

Biodegradable polylactic acid emulsion ink based on carbon nanotubes and silver for printed pressure sensors

Microbes and Sustainable Living: Focus on Electric and Magnetic Fields

Nonelectroactive clostridium obtains extracellular electron transfer-capability after forming chimera with Geobacter

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