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首页> 外文期刊>Environmental Science & Technology >Formation of Zerovalent Iron in Iron-Reducing Cultures of Methanosarcina barkeri
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Formation of Zerovalent Iron in Iron-Reducing Cultures of Methanosarcina barkeri

机译：在甲蛋白酶甲基甲酸的铁还原培养中形成Zerovalent铁

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摘要

Methanogenic archaea have been shown to reduce iron from ferric [Fe(Ⅲ)] to ferrous [Fe(Ⅱ)] state, but minerals that form during iron reduction by different methanogens remain to be characterized. Here, we show that zerovalent iron (ZVI) minerals, ferrite [α-Fe(0)] and austenite [γ-Fe(0)], appear in the X-ray diffraction spectra minutes after the addition of ferrihydrite to the cultures of a methanogenic archaeon, Methanosarcina barkeri (M. barkeri). M. barkeri cells and redox-active, nonenzymatic soluble organic compounds in organic-rich spent culture super- natants can promote the formation of ZVI; the latter compounds also likely stabilize ZVI. Methanogenic microbes that inhabit organic- and Fe(Ⅲ)-rich anaerobic environments may similarly reduce Fe(Ⅲ) to Fe(Ⅱ) and ZVI, with implications for the preservation of paleomagnetic signals during sediment diagenesis and potential applications in the protection of iron metals against corrosion and in the green synthesis of ZVI.
机译：已显示甲状腺原煤以将铁从铁[Fe（Ⅲ）]还原为铁（Ⅱ）]状态，但在不同甲烷中的铁还原过程中的矿物质仍将其特征。在这里，我们表明Zeropalent铁（ZVI）矿物质，铁氧体[α-Fe（0）]和奥氏体[γ-Fe（0）]，在加入Ferrihydrite后，在X射线衍射光谱分钟内出​​现在培养物中一种甲基甲基archaeon，Methanosarcina Barkeri（M. Barkeri）。 M. Barkeri细胞和氧化还原活性的非酶溶性有机化合物，在有机富含香料的培养培养物中可以促进ZVI的形成;后一种化合物也可能稳定ZVI。含有有机物和Fe（Ⅲ） - 中间厌氧环境的甲状腺炎微生物可以类似地减少Fe（Ⅲ）至Fe（Ⅱ）和ZVI，并对沉积物成岩作用期间的古磁性信号保存以及保护铁金属的潜在应用的影响抗腐蚀和ZVI的绿色合成。

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  • 来源
    《Environmental Science & Technology》 |2020年第12期|7354-7365|共12页
  • 作者

    Haitao Shang; Mirna Daye; Orit Sivan; Caue S. Borlina; Nobumichi Tamura; Benjamin P. Weiss; Tanja Bosak;

  • 作者单位

    Department of Earth Atmospheric and Planetary Sciences Massachusetts Institute of Technology Cambridge Massachusetts 02139 United States;

    Department of Earth Atmospheric and Planetary Sciences Massachusetts Institute of Technology Cambridge Massachusetts 02139 United States;

    Department of Geological and Environmental Sciences Ben Gurion University of the Negev Beer Sheva 84105 Israel;

    Department of Earth Atmospheric and Planetary Sciences Massachusetts Institute of Technology Cambridge Massachusetts 02139 United States;

    Advanced Light Source Lawrence Berkeley National Laboratory Berkeley California 94720 United States;

    Department of Earth Atmospheric and Planetary Sciences Massachusetts Institute of Technology Cambridge Massachusetts 02139 United States;

    Department of Earth Atmospheric and Planetary Sciences Massachusetts Institute of Technology Cambridge Massachusetts 02139 United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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