A critical review on sulfur reduction of aqueous selenite: Mechanisms and applications

Xiong, Jingang; Wang, Hainan; Yao, Jinni; He, Qiang; Ma, Jun; Yang, Jingjing; Liu, Caihong; Yao, Changliang; Huangfu, Xiaoliu; Liu, Hongxia

doi:10.1016/j.jhazmat.2021.126852

Cited by 20 publications

(11 citation statements)

References 115 publications

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“…Consequently, autotrophs oxidizing reductive Fe and S species in pyrrhotite were crucial. Thiobacillus was considered a chemoautotrophic genus that could oxidize Fe(II) to Fe(III), S 2– to S 0 , and SO 4 2– . , Thermomonas , a typical denitrifier, participated in Fe(II) oxidation. , The resulting Fe(III) quickly precipitated in a weakly alkaline environment . Correspondingly, an increased Fe(III) area of XPS pattern with time was observed on the mineral surface (Figure E–H).…”

Section: Discussionmentioning

confidence: 94%

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: Discussionmentioning

confidence: 94%

Vanadate Bio-Detoxification Driven by Pyrrhotite with Secondary Mineral Formation

Zhang

Wang

et al. 2023

Environ. Sci. Technol.

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“…While selenite (product of selenium dioxide and water) has been identified as a highly toxic chemical, 38 the morphology of nanoparticles may show reduced toxicity 39 . In this study, in vitro cell viability tests were performed to preliminarily explore the cytotoxicity of selenium (IV) oxide and selenium (0) nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

Selenium nanoparticles are effective in penetrating pine and causing high oxidative damage to Bursaphelenchus xylophilus in pine wilt disease control

Shang

Zhang

Zhao

et al. 2022

Pest Management Science

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BACKGROUND: Research on selenium nanoparticles (SeNPs) in chemical defense and chemotherapy of plants has developed rapidly owing to their high microbial toxicity, environmental safety, and degradability. Pine wilt disease (PWD) threatens pine forests worldwide; however, it is difficult to kill the nematodes (Bursaphelenchus xylophilus) inside the tree that cause PWD using traditional pesticide formulations. SeNPs could be the key to controlling PWD.RESULTS: In this study, approximately 50 nm SeNPs were prepared using a simple and green method, and chitosan was used to increase their biocompatibility and stability. The preparation and characterization results showed that the prepared SeNPs coated with chitosan (SeNPs@CS) were spherical and evenly dispersed. The bioassay results showed that SeNPs@CS had an LC 50 of 15.627 mg L −1 against B. xylophilus. In addition, the killing mechanism of SeNPs@CS against B. xylophilus was studied. Confocal microscopy and transmission electron microscopy demonstrated that B. xylophilus were killed by reactive oxygen species, and the penetration of nano-form materials to B. xylophilus was higher than that of non-nano-form materials. To verify the effective penetration of SeNPs in pine tissues, Cy5-labeled SeNPs@CS was observed inside pine needles and branches using frozen sections and confocal microscopy. In addition, the cytotoxicity of SeO 2 and SeNPs@CS was tested, and the results showed that the cytotoxicity of SeNPs@CS to MC3T3-E1 cells was reduced.CONCLUSION: These results show that SeNPs are expected to be used as a new strategy for the control of PWD with oxidative damage and high penetration to B. xylophilus and effective target penetration and biosafety.

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“…) is highly mobile and 40 times more toxic than other oxidation states in environmental water and soil samples, and its toxicological effects are not only related to the concentration, but also closely related to its valence. [14][15][16] The consumption of selenite above the level (10 ppb) recommended by the World Health Organization (WHO) can lead to chronic health effects and oxidative stress damage to intracellular critical components, such as proteins, DNA, lipids, etc. 17,18 Therefore, it is of great significance and imperative to develop a simple, quick, highly sensitive sensory system for the accurate determination of SeO 3 2À in biological systems.…”

Section: àmentioning

confidence: 99%

Ultrasensitive and selective fluorescence recognition of selenite byo-phenylenediamine functionalized carbon quantum dots

et al. 2022

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A critical review on sulfur reduction of aqueous selenite: Mechanisms and applications

Cited by 20 publications

References 115 publications

Vanadate Bio-Detoxification Driven by Pyrrhotite with Secondary Mineral Formation

Vanadate Bio-Detoxification Driven by Pyrrhotite with Secondary Mineral Formation

Selenium nanoparticles are effective in penetrating pine and causing high oxidative damage to Bursaphelenchus xylophilus in pine wilt disease control

Ultrasensitive and selective fluorescence recognition of selenite byo-phenylenediamine functionalized carbon quantum dots

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