Microbial selenate detoxification linked to elemental sulfur oxidation: Independent and synergic pathways

Li, Liuliu; Zhang, Baogang; Li, Lei; Borthwick, Alistair G.L.

doi:10.1016/j.jhazmat.2021.126932

Cited by 16 publications

(5 citation statements)

References 77 publications

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“…53,87 At the same time, specific genera such as Desulfurivibrio and Sulf urifustis oxidized pyrrhotite to synthesize VFAs, 4,56 which were utilized by a series of VRB such as Anaerolinea, Bacillus, and Pseudomonas to reduce V(V). 60,88 V(V) was reduced to insoluble V(IV), while Fe and S elements in pyrrhotite were oxidized to Fe(III) and SO 4 2− . These products were further transformed by SRB (e.g., Desulfatiglans) and MTB (e.g., Nitrospira).…”

Section: ■ Resultsmentioning

confidence: 99%

“…Cyt c, an active component of electron transport across the cell membrane, was detected in this study. It reduced heavy metals such as V(V), Se(VI), and Cr(VI) through mediating electron transfer reactions on cell surfaces. ,, Cyt c also contributed to the electron transfer between Fe(II) and cell membranes to mediate the Fe(II) oxidation process . NADH is an intracellular coenzyme that functions as an electron donor to detoxify V(V) .…”

Section: Discussionmentioning

confidence: 99%

“…For V(V) reduction, both independence and synergism occurred. A single autotroph (e.g., Thiobacillus and Thermomonas ) completed V(V) reduction by oxidizing reduced Fe and S in pyrrhotite independently. , At the same time, specific genera such as Desulfurivibrio and Sulfurifustis oxidized pyrrhotite to synthesize VFAs, , which were utilized by a series of VRB such as Anaerolinea , Bacillus , and Pseudomonas to reduce V(V). , V(V) was reduced to insoluble V(IV), while Fe and S elements in pyrrhotite were oxidized to Fe(III) and SO 4 2– . These products were further transformed by SRB (e.g., Desulfatiglans ) and MTB (e.g., Nitrospira ).…”

Section: Discussionmentioning

confidence: 99%

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Vanadate Bio-Detoxification Driven by Pyrrhotite with Secondary Mineral Formation

Zhang

Wang

et al. 2023

Environ. Sci. Technol.

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Vanadium(V) is a redox-sensitive heavy-metal contaminant whose environmental mobility is strongly influenced by pyrrhotite, a widely distributed iron sulfide mineral. However, relatively little is known about microbially mediated vanadate [V(V)] reduction characteristics driven by pyrrhotite and concomitant mineral dynamics in this process. This study demonstrated efficient V(V) bioreduction during 210 d of operation, with a lifespan about 10 times longer than abiotic control, especially in a stable period when the V(V) removal efficiency reached 44.1 ± 13.8%. Pyrrhotite oxidation coupled to V(V) reduction could be achieved by an enriched single autotroph (e.g., Thiobacillus and Thermomonas) independently. Autotrophs (e.g., Sulfurifustis) gained energy from pyrrhotite oxidation to synthesize organic intermediates, which were utilized by the heterotrophic V(V) reducing bacteria such as Anaerolinea, Bacillus, and Pseudomonas to sustain V(V) reduction. V(V) was reduced to insoluble tetravalent V, while pyrrhotite oxidation mainly produced Fe(III) and SO4 2–. Secondary minerals including mackinawite (FeS) and greigite (Fe3S4) were produced synchronously, resulting from further transformations of Fe(III) and SO4 2– by sulfate reducing bacteria (e.g., Desulfatiglans) and magnetotactic bacteria (e.g., Nitrospira). This study provides new insights into the biogeochemical behavior of V under pyrrhotite effects and reveals the previously overlooked mineralogical dynamics in V(V) reduction bioprocesses driven by Fe(II)-bearing minerals.

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Section: ■ Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Vanadate Bio-Detoxification Driven by Pyrrhotite with Secondary Mineral Formation

Zhang

Wang

et al. 2023

Environ. Sci. Technol.

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“…Higher than normal levels of dietary selenium have also been linked to impaired thyroid and immune functions, liver toxicity, and increased cancer risks [ 11 ]. The narrow gap between its essentiality and toxicity in humans has attracted research interest in environmental selenium pollution and detoxification [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Selenite selectively kills lung fibroblasts to treat bleomycin-induced pulmonary fibrosis

Lin,

Liu,

Liu

et al. 2024

Redox Biology

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“…Diverse enzymes of various microorganisms take part in the reduction processes, that possess abilities of the metalloreductase, 28,29 carboxylic acid reductase, 30,31 selenate 32 and selenite reductases, 33–36 hydrogenase, 37 cromate reductase, 38,39 nitrite 40 and nitrate reductases 41 etc. However, the problem of identification and classification for many reductases was not solved up to day.…”

Section: Introductionmentioning

confidence: 99%

Nanozymes with reductase-like activities: antioxidant properties and electrochemical behavior

et al. 2022

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Microbial selenate detoxification linked to elemental sulfur oxidation: Independent and synergic pathways

Cited by 16 publications

References 77 publications

Vanadate Bio-Detoxification Driven by Pyrrhotite with Secondary Mineral Formation

Vanadate Bio-Detoxification Driven by Pyrrhotite with Secondary Mineral Formation

Selenite selectively kills lung fibroblasts to treat bleomycin-induced pulmonary fibrosis

Nanozymes with reductase-like activities: antioxidant properties and electrochemical behavior

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