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首页> 外文期刊>Environmental Science & Technology >Methanogenesis Facilitated by Geobiochemical Iron Cycle in a Novel Syntrophic Methanogenic Microbial Community
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Methanogenesis Facilitated by Geobiochemical Iron Cycle in a Novel Syntrophic Methanogenic Microbial Community

机译:在新的同养性产甲烷微生物群落中由地球化学生铁循环促成甲烷作用。

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摘要

Production and emission of methane have been increasing concerns due to its significant effect on global climate change and the carbon cycle. Here we report facilitated methane production from acetate by a novel community of methanogens and acetate oxidizing bacteria in the presence of poorly crystalline akaganeite slurry. Comparative analyses showed that methanogenesis was significantly enhanced by added akaganeite and acetate was mostly stoichiometrically converted to methane. Electrons produced from anaerobic acetate oxidation are transferred to akaganeite nanorods that likely prompt the transformation into goethite nanofibers through a series of biogeochemical processes of soluble Fe(Ⅱ) readsorption and Fe(Ⅲ) reprecipitation. The methanogenic archaea likely harness the biotransformation of akaganeite to goethite by the Fe(Ⅲ)-Fe(Ⅱ) cycle to facilitate production of methane. These results provide new insights into biogeochemistry of iron minerals and methanogenesis in the environment, as well as the development of sustainable methods for microbial methane production.
机译:甲烷的产生和排放由于对全球气候变化和碳循环的重大影响而引起越来越多的关注。在这里,我们报告了在结晶性较差的赤霞石浆液存在下,由甲烷生成素和乙酸盐氧化细菌组成的新型群落促进了乙酸盐甲烷的生产。对比分析表明,添加的赤霞石显着增强了甲烷生成,乙酸根大部分以化学计量方式转化为甲烷。厌氧乙酸盐氧化产生的电子被转移到赤铁矿纳米棒中,这可能通过一系列可溶性Fe(Ⅱ)再吸收和Fe(Ⅲ)再沉淀的生物地球化学过程促使其转变为针铁矿纳米纤维。产甲烷的古细菌可能利用赤铁矿通过Fe(Ⅲ)-Fe(Ⅱ)循环生物转化为针铁矿,以促进甲烷的产生。这些结果为环境中铁矿物质的生物地球化学和甲烷生成以及开发可持续的微生物甲烷生产方法提供了新的见识。

著录项

  • 来源
    《Environmental Science & Technology》 |2013年第17期|10078-10084|共7页
  • 作者单位

    School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea,Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States;

    School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea;

    School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea;

    Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, Republic of Korea;

    Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States;

    Faculty of Environment, Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam;

    BioTechnology Institute and Department of Soil, Water, and Climate, University of Minnesota, St. Paul, Minnesota 55108, United States;

    School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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