Benzene promotes microbial Fe(III) reduction and flavins secretion

Liu, Shan; Liu, Hui; Wang, Zhu; Cui, Yanping; Chen, Rong; Peng, Zhaoliang; Yuan, Songhu; Shi, Liang

doi:10.1016/j.gca.2019.08.013

Cited by 23 publications

(3 citation statements)

References 52 publications

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“…Furthermore, the addition of the electron shuttle compound AQS also accelerated the consumption of sodium lactate. Sodium lactate stimulates cellular metabolism and provides more electrons for the Fe (III) biological reduction [43,63,64]. Zhu Weihuang et al found that the interaction between microorganisms and iron oxides became more favorable in the presence of AQS in the reaction system.…”

Section: Aniline Promotes Aqs-mediated Reduction Of Fe (Iii) Oxides B...mentioning

confidence: 99%

The Effects of Aniline-Promoted Electron Shuttle-Mediated Goethite Reduction by Shewanella oneidensis MR-1 and theDegradation of Aniline

Tang,

Wang,

Dong

et al. 2023

Water

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The biological reduction of Fe (III) is common in underground environments. This process not only affects the biogeochemical cycle of iron but also influences the migration and transformation of pollutants. Humic substances are considered effective strategies for improving the migration and transformation of toxic substances and enhancing the bioavailability of Fe (III). In this study, the electron shuttle anthraquinone-2-sulfonate (AQS) significantly promoted the bio-reduction of Fe (III). On this basis, different concentrations of aniline were added. The research results indicate that at an aniline concentration of 3 μM, the production of Fe (II) in the reaction system was 2.51 times higher compared to the microbial reaction group alone. Furthermore, the degradation of aniline was most effective in this group. The increased consumption of sodium lactate suggests that aniline, under the mediation of AQS, promoted the metabolism of Shewanella oneidensis MR-1 cells and facilitated the involvement of more electrons in the reduction process. After the reaction, the solid mineral Fe (II)-O content increased to 41.32%. This study provides insights into the reduction mechanism of Fe (III) in the complex environment of microorganisms, iron minerals, electron shuttles, and pollutants. It aims to offer a theoretical basis for the biodegradation of aromatic hydrocarbon pollutants.

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Section: Aniline Promotes Aqs-mediated Reduction Of Fe (Iii) Oxides B...mentioning

confidence: 99%

The Effects of Aniline-Promoted Electron Shuttle-Mediated Goethite Reduction by Shewanella oneidensis MR-1 and theDegradation of Aniline

Tang,

Wang,

Dong

et al. 2023

Water

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“…According to previous reports, adding benzene can increase lactic acid consumption, promote microbial metabolism and provide more electrons for Fe (III). After benzene treatment, the permeability of cell membrane is enhanced and contributes to cell metabolism and electron consumption [23]. Therefore, the addition of Aniline to accelerate the bioreduction of Fe (III) by MR-1 was due to the increase of cell membrane permeability and the consumption of sodium lactate to make more electrons participate in the reaction process.…”

Section: Consumption and Kinetic Analysis Of Sodium Lactatementioning

confidence: 99%

Aniline-Promoted Electron Shuttle-Mediated Fe(III) Bioreduction and Effects on Solid Mineral

Tang,

Wang,

Dong

et al. 2023

Preprint

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Microbial-mediated biogeochemical cycling of iron is widespread in anaerobic environments such as sediments and deep Earth aquifers, and is one of the major pathways for metabolising iron in nature. Organic matter containing quinone groups can act as electron shuttles to transfer electrons between microorganisms and Fe(III) oxides, facilitating the biotransformation of iron; this process also influences the transport transformation of pollutants. In this paper, the reduction of Fe(III) oxides by aniline in the heterogeneous iron-reducing bacterium Shewanella oneidensis MR-1 mediated by the electron shuttle AQS was investigated. The results showed that aniline significantly promoted the reduction of Fe(III) by MR-1 in the AQS-mediated reaction, and the best Fe(III) reduction was achieved in the reaction group of "GT+MR-1+0.5mM AQS+3μM aniline", in which the Fe(II) production was significantly higher than that in the reaction groups of only microorganisms and no aniline reaction. The amount of Fe(II) produced was significantly higher than that of the microorganism-only and aniline-free reaction groups, and the addition of aniline also significantly increased the consumption of sodium lactate by MR-1 in the reaction system. The solid mineral Fe(II)-O content increased to 41.32% after the reaction. However, the structure of needle ferrite is relatively stable, and the surface morphology did not change significantly by SEM, and the generation of other secondary minerals was not observed in the XRD results. The results of this experimental study can help to understand the biogeochemical cycle of iron in multicomponent reactions and are of great significance for environmental management.

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“…In the existing environmental hydrogeological investigations, organic pollution of groundwater has been found to enhance the release of Fe and Mn from aquifer sediments into groundwater [49], especially in those aquifers with abundant Fe and Mn contents. This enhancement, induced by the groundwater pollution with organics, increases the concentrations of Fe and Mn in groundwater to different degrees, and even makes groundwater in some regions unpotable considering Fe and Mn.…”

Section: Input Of Organics Increase Fe/mn Releasementioning

confidence: 99%

Anthropogenic Organic Pollutants in Groundwater Increase Releases of Fe and Mn from Aquifer Sediments: Impacts of Pollution Degree, Mineral Content, and pH

Zhai

Han

Xia

et al. 2021

Water

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In many aquifers around the world, there exists the issue of abnormal concentrations of Fe and Mn in groundwater. Although it has been recognized that the main source of this issue is the release of Fe and Mn from aquifer sediments into groundwater under natural environmental conditions, there lacks enough reliable scientific evidence to illustrate whether the pollutants imported from anthropogenic activities, such as organics, can increase this natural release. On the basis of time series analysis and comparative analysis, the existence of an increasing effect was verified through laboratorial leaching test, and the impacts of aquatic chemical environment conditions, such as pH, on the effect were also identified. The results showed that the increase of organics in groundwater made the release of Fe and Mn more thorough, which was favorable for the increase of groundwater concentrations of Fe and Mn. The higher the contents of Fe- and Mn-bearing minerals in aquifer sediments, the higher the concentrations of Fe and Mn in groundwater after the release reaches kinetic equilibrium. Lower pH can make the leaching more thorough, but the neutral environment also increases the amount of Mn. It can be deduced that the pollutants such as organics imported by anthropogenic activities can indeed increase the releases of Fe and Mn from aquifer sediments into groundwater, thus worsening the issue of groundwater Fe and Mn pollution. The findings provide a deeper insight into the geochemical effects of Fe and Mn in the natural environment, especially in the groundwater system.

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Benzene promotes microbial Fe(III) reduction and flavins secretion

Cited by 23 publications

References 52 publications

The Effects of Aniline-Promoted Electron Shuttle-Mediated Goethite Reduction by Shewanella oneidensis MR-1 and theDegradation of Aniline

The Effects of Aniline-Promoted Electron Shuttle-Mediated Goethite Reduction by Shewanella oneidensis MR-1 and theDegradation of Aniline

Aniline-Promoted Electron Shuttle-Mediated Fe(III) Bioreduction and Effects on Solid Mineral

Anthropogenic Organic Pollutants in Groundwater Increase Releases of Fe and Mn from Aquifer Sediments: Impacts of Pollution Degree, Mineral Content, and pH

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