Degradation of 2, 2′, 4, 4′-Tetrabrominated diphenyl ether (BDE-47) via the Fenton reaction driven by the dissimilatory metal-reducing bacterium Shewanella oneidensis MR-1

Peng, Zhaoliang; Shi, Min; Xia, Kemin; Dong, Yiran; Shi, Liang

doi:10.1016/j.envpol.2020.115413

Cited by 17 publications

(35 citation statements)

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“…Ferrihydrite was synthesized and characterized by following the established protocols as described previously (Peng et al, 2020; Schwertmann & Cornell, 2000; Yang et al, 2020). All the results of characterizing synthesized ferrihydrite were consistent with those reported before (Peng et al, 2020; Shi et al, 2021; Yang et al, 2020). The characterized ferrihydrite was stored at 4°C with a shelf life of 60 days.…”

Section: Methodsmentioning

confidence: 99%

“…After centrifugation (5000 g , 4°C and 5 min), the amount of ABTS •+ , which is the product of reaction between ABTS and H 2 O 2 , in the supernatants was determined by a UV–Vis spectrometer (Kadnikova & Kostic, 2002). Horseradish peroxidase was used for establishing H 2 O 2 standard curve and purchased from Macklin (Peng et al, 2020; Shi et al, 2021).…”

Section: Methodsmentioning

confidence: 99%

“…Shewanella oneidensis was obtained and cultured in lysogeny broth (LB) medium as described before (Peng et al, 2020;Shi et al, 2021). The procedure for making a clean gene cluster deletion in S. oneidensis was described previously (Gorby et al, 2006;Shi et al, 2006;Shi et al, 2008).…”

Section: Bacterial Strains Culture Conditions Gene Deletion and Cloningmentioning

confidence: 99%

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The roles of DmsEFAB and MtrCAB in extracellular reduction of iodate by Shewanella oneidensis MR‐1 with lactate as the sole electron donor

Guo

Jiang

et al. 2022

Environmental Microbiology

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To investigate their roles in extracellular reduction of iodate (IO3−) with lactate as an electron donor, the gene clusters of dmsEFAB, mtrCAB, mtrDEF and so4360‐4357 in Shewanella oneidensis MR‐1 were systematically deleted. Deletions of dmsEFAB and/or mtrCAB gene clusters diminished the bacterial ability to reduce IO3−. Furthermore, DmsEFAB and MtrCAB worked collaboratively to reduce IO3− of which DmsEFAB played a more dominant role than MtrCAB. MtrCAB was involved in detoxifying the reaction intermediate hydrogen peroxide (H2O2). The reaction intermediate hypoiodous acid (HIO) was also found to inhibit microbial IO3− reduction. SO4360‐4357 and MtrDEF, however, were not involved in IO3− reduction. Collectively, these results suggest a novel mechanism of extracellular reduction of IO3− at molecular level, in which DmsEFAB reduces IO3− to HIO and H2O2. The latter is further reduced to H2O by MtrCAB to facilitate the DmsEFAB‐mediated IO3− reduction. The extracellular electron transfer pathway of S. oneidensis MR‐1 is believed to mediate electron transfer from bacterial cytoplasmic membrane, across the cell envelope to the DmsEFAB and MtrCAB on the bacterial outer membrane.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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The roles of DmsEFAB and MtrCAB in extracellular reduction of iodate by Shewanella oneidensis MR‐1 with lactate as the sole electron donor

Guo

Jiang

et al. 2022

Environmental Microbiology

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“…At predetermined time points, the concentration of IO 3 – in the reaction solution was measured with the iodate triiodide method, , and the concentrations of Fe(II) and total Fe were determined using the ferrozine assay after extraction with 0.5 M HCl. , Fe(III) concentrations were calculated by the difference between total Fe and Fe(II). , After 24 h of incubation, the amount of produced I – was measured by ion chromatography (ECO IC, Metrohm AG, Herisau, Switzerland) with a Metrosep A Supp 5-520 column . The detection limit of IO 3 – and I – is 0.05 μg/L and 0.025 μg/L, respectively. , To identify possible reaction intermediates, such as reactive oxygen species (ROS) and HIO which presents during microbial IO 3 – reduction, the H 2 O 2 and HO• were determined with the modified DPD method and the p-HBA conversion method, , respectively (see details in the Supporting Information). In addition, the HO• scavenger mannitol (120 mM) was supplemented to the modified M1 medium to indirectly discriminate the generation of HO• and its role in IO 3 – reduction.…”

Section: Methodsmentioning

confidence: 99%

“…Cultures were incubated anaerobically at 30 °C. At predetermined time points, the concentrations of IO 3 – , Fe(II), and total Fe in the reaction solution were measured with the iodate triiodide method , and the ferrozine assay, , respectively. Fe(III) concentrations were calculated by the difference between the total Fe and Fe(II).…”

Section: Methodsmentioning

confidence: 99%

Abiotic and Biotic Reduction of Iodate Driven by Shewanella oneidensis MR-1

Jiang,

Cui,

Qian

et al. 2023

Environ. Sci. Technol.

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Iodate (IO3 –) can be abiotically reduced by Fe(II) or biotically reduced by the dissimilatory Fe(III)-reducing bacterium Shewanella oneidensis (MR-1) via its DmsEFAB and MtrCAB. However, the intermediates and stoichiometry between the Fe(II) and IO3 – reaction and the relative contribution of abiotic and biotic IO3 – reduction by biogenic Fe(II) and MR-1 in the presence of Fe(III) remain unclear. In this study, we found that abiotic reduction of IO3 – by Fe(II) produced intermediates HIO and I– at a ratio of 1:2, followed by HIO disproportionation to I– and IO3 –. Comparative analyses of IO3 – reduction by MR-1 wild type (WT), MR-1 mutants deficient in DmsEFAB or MtrCAB, and Shewanella sp. ANA-3 in the presence of Fe(III)-citrate, Fe(III) oxides, or clay minerals showed that abiotic IO3 – reduction by biogenic Fe(II) predominated under iron-rich conditions, while biotic IO3 – reduction by DmsEFAB played a more dominant role under iron-poor conditions. Compared to that in the presence of Fe(III)-citrate, MR-1 WT reduced more IO3 – in the presence of Fe(III) oxides and clay minerals. The observed abiotic and biotic IO3 – reduction by MR-1 under Fe-rich and Fe-limited conditions suggests that Fe(III)-reducing bacteria could contribute to the transformation of iodine species and I– enrichment in natural iodine-rich environments.

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Application of dissimilatory iron-reducing bacteria for the remediation of soil and water polluted with chlorinated organic compounds: Progress, mechanisms, and directions

Zhong,

Lyu,

Wang

et al. 2024

Chemosphere

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Degradation of 2, 2′, 4, 4′-Tetrabrominated diphenyl ether (BDE-47) via the Fenton reaction driven by the dissimilatory metal-reducing bacterium Shewanella oneidensis MR-1

Cited by 17 publications

References 50 publications

The roles of DmsEFAB and MtrCAB in extracellular reduction of iodate by Shewanella oneidensis MR‐1 with lactate as the sole electron donor

The roles of DmsEFAB and MtrCAB in extracellular reduction of iodate by Shewanella oneidensis MR‐1 with lactate as the sole electron donor

Abiotic and Biotic Reduction of Iodate Driven by Shewanella oneidensis MR-1

Application of dissimilatory iron-reducing bacteria for the remediation of soil and water polluted with chlorinated organic compounds: Progress, mechanisms, and directions

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