Nanoparticles Formed by Microbial Metabolism of Metals and Minerals

Barton, Larry L.; Torres, Francisco A. Tomei; Xu, Huifang; Zocco, T.G.

doi:10.1007/978-1-4939-1667-2_7

Cited by 3 publications

(4 citation statements)

References 137 publications

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“…It was also reported for its potential to degrade diesel derived hydrocarbons in a microbial fuel cell. Desulfovibrio directly transferred extracellular electrons to the anode through a multihemic cytochrome c protein in a mediator-free microbial fuel cell. − In another study, Desulfovibrio was reported to produce nanoscale, bacterial appendages for direct extracellular electron transfer Desulfovibrio was also able to indirectly transfer electrons to the electrode using an inorganic electron mediator in a microbial fuel cell. , …”

Section: Resultsmentioning

confidence: 99%

Evidence and Mechanisms of Selenate Reduction to Extracellular Elemental Selenium Nanoparticles on the Biocathode

Zhang

Asefaw

Xiong

et al. 2022

Environ. Sci. Technol.

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Intracellular selenium nanoparticles (SeNPs) production is a roadblock to the recovery of selenium from biological water treatment processes because it is energy intensive to break microbial cells and then separate SeNPs. This study provided evidence of significantly more extracellular SeNP production on the biocathode (97−99%) compared to the conventional reactors (1−90%) using transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy. The cathodic microbial community analysis showed that relative abundance of Azospira oryzae, Desulfovibrio, Stenotrophomonas, and Rhodocyclaceae was <1% in the inoculum but enriched to 10−21% for each group when the bioelectrochemical reactor reached a steady state. These four groups of microorganisms simultaneously produce intracellular and extracellular SeNPs in conventional biofilm reactors per literature review but prefer to produce extracellular SeNPs on the cathode. This observation may be explained by the cellular energetics: by producing extracellular SeNPs on the biocathode, microbes do not need to transfer selenate and the electrons from the cathode into the cells, thereby saving energy. Extracellular SeNP production on the biocathode is feasible since we found high concentrations of C-type cytochrome, which is well known for its ability to transfer electrons from electrodes to microbial cells and reduce selenate to SeNPs on the cell membrane.

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Section: Resultsmentioning

confidence: 99%

Evidence and Mechanisms of Selenate Reduction to Extracellular Elemental Selenium Nanoparticles on the Biocathode

Zhang

Asefaw

Xiong

et al. 2022

Environ. Sci. Technol.

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“…This non-specific enzymatic reduction of metal ions is not limited to SRB. It has also been reported for hydrogenase, cytochrome, nitrate reductase and catalase isolated from other anaerobic and facultative-anaerobic bacteria [7,8].…”

Section: Respiratory Metal Reductionmentioning

confidence: 93%

“…This production of nanoparticles is not unique to SRB. Many taxonomically diverse bacteria produce metallic nanoparticles either in the cytoplasm, periplasm, or extracellular region [7].…”

Section: Respiratory Metal Reductionmentioning

confidence: 99%

Metabolism of Metals and Metalloids by the Sulfate-Reducing Bacteria

Barton

Torres

et al. 2015

Bacteria-Metal Interactions

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The bacteria and archaea that reduce sulfate to sulfide can transform a variety of metal(loids). The latter include metalloids (As, Se and Te), transition metals (Au, Co, Cr, Fe, Hg, Mo, Mn, Ni, Pb, Pd, Pt, Re, Rh, Tc, V, and Zn), and actinides (Pu and U). The conversions are achieved via (1) use of metal-specific enzymes, (2) cometabolism, i.e., use of non-substrate-specific enzymes, (3) biomethylation, (4) inorganic precipitation, (5) oxidation-reduction reactions in the growth medium; or (6) oxidation/cathodic depolarization of the elemental form. Respective examples are (1) the respiration of arsenate by Desulfosporosinus auripigmenti; (2) reduction of selenate and selenite to elemental selenium by enzymes involved in sulfate respiration or assimilation; (3) methylation of mercury; (4) precipitation of zinc sulfide in the supernatant; (5) reaction of sulfide and selenite forming selenium sulfide (SeS 2 ) in the supernatant; and (6) the anaerobic corrosion of iron. Some of these processes yield valuable commodities, e.g., the precipitation of gold by Desulfovibrio desulfuricans. The understanding of anaerobic corrosion can lead to the prevention of corrosion of pipelines. The formation of selenium nanoparticles has potential applications in the design of drug-delivery

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“…In a similar fashion, and quasi-opposed to MFC, microbial electrosynthesis (MES) can be used to convert electricity (back) into chemical compounds for e.g., energy storage, to bridge intermittent availability and demand 76 . Some evidence also indicates the possibility of generating hydrogen through nanoparticle production from Lunar regolith 77,78 . Hydrogen, methane, and other biofuels can also be produced from other in situ resources, such as water and inorganic carbon, photo-or lithoautotrophically (e.g., with cyanobacteria and various algae species), to generate stable energy carriers 6,78 .…”

Section: Biological Collection and Storage Of Energymentioning

confidence: 99%

Toward sustainable space exploration: a roadmap for harnessing the power of microorganisms

Santomartino

Averesch

Bhuiyan³

et al. 2023

Nat Commun

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Finding sustainable approaches to achieve independence from terrestrial resources is of pivotal importance for the future of space exploration. This is relevant not only to establish viable space exploration beyond low Earth–orbit, but also for ethical considerations associated with the generation of space waste and the preservation of extra-terrestrial environments. Here we propose and highlight a series of microbial biotechnologies uniquely suited to establish sustainable processes for in situ resource utilization and loop-closure. Microbial biotechnologies research and development for space sustainability will be translatable to Earth applications, tackling terrestrial environmental issues, thereby supporting the United Nations Sustainable Development Goals.

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Nanoparticles Formed by Microbial Metabolism of Metals and Minerals

Cited by 3 publications

References 137 publications

Evidence and Mechanisms of Selenate Reduction to Extracellular Elemental Selenium Nanoparticles on the Biocathode

Evidence and Mechanisms of Selenate Reduction to Extracellular Elemental Selenium Nanoparticles on the Biocathode

Metabolism of Metals and Metalloids by the Sulfate-Reducing Bacteria

Toward sustainable space exploration: a roadmap for harnessing the power of microorganisms

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