...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Electricity-Assisted Biological Hydrogen Production from Acetate by Geobacter sulfurreducens
【24h】

Electricity-Assisted Biological Hydrogen Production from Acetate by Geobacter sulfurreducens

机译：土杆菌还原硫从乙酸中产生的电力辅助生物制氢

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Geobacter sulfurreducens is a well-known current-producing microorganism in microbial fuel cells, and is able to use acetate and hydrogen as electron donor. We studied the functionality of G. sulfurreducensas biocatalystfor hydrogen formation at the cathode of a microbial electrolysis cell (MEC). Geobacter sulfurreducenswas grown in the bioelectrode compartment of a MFC with acetate as the substrate and reduction of complexed Fe(III) at the counter electrode. After depletion of the acetate the electrode potential of the bioelectrode was decreased stepwise to -1.0 V vs Ag/AgCl reference. Production of negative current was observed, which increased in time, indicating that the bioelectrode was now acting as biocathode. Headspace analyses carried out at electrode potentials ranging from -0.8 to -1.0 V showed that hydrogen was produced, with higher rates at more negative cathode potentials. Subsequently, the metabolic properties of G. sulfurreducens for acetate oxidation atthe anode and hydrogen production atthe cathode were combined in one-compartment membraneless MECs operated at applied voltages of 0.8 and 0.65 V. After two days, current densities were 0.44 A m~(-2) at 0.8 V applied voltage and 0.22 A m~(-2) at 0.65 V, using flat-surface carbon electrodes for both anode and cathode. The cathodic hydrogen recovery ranged from 23% at 0.5 V applied voltage to 43% at 0.9 V.
机译：还原性土壤细菌是微生物燃料电池中众所周知的电流产生微生物，并且能够使用乙酸盐和氢作为电子供体。我们研究了在微生物电解池（MEC）阴极上硫还原菌生物催化剂对氢形成的功能。减少土壤细菌中的硫的还原菌在MFC的生物电极室中生长，其中乙酸盐为底物，并在对电极处还原络合的Fe（III）。乙酸盐耗尽后，生物电极的电极电位相对于Ag / AgCl参比逐步降低至-1.0V。观察到负电流的产生，该负电流随时间增加，表明该生物电极现在起着生物阴极的作用。在-0.8至-1.0 V的电极电势下进行的顶空分析表明，产生了氢，在负阴极电势更高时产生了更高的速率。随后，将硫酸还原菌的还原特性用于阳极乙酸盐氧化和在阴极阴极产生氢气的过程，在施加电压为0.8和0.65 V的单室无膜MEC中进行。两天后，电流密度为0.44 A m〜（- 2）在施加电压0.8 V和在0.65 V施加0.22 A m〜（-2）的情况下，阳极和阴极均使用平面碳电极。阴极氢气的回收率范围从施加0.5 V电压时的23％到0.9 V时的43％。

著录项

  • 来源
    《Environmental Science & Technology》 |2011年第2期|p.815-820|共6页
  • 作者

    JEANINE S. GEELHOED; ALFONS J. M. STAMS;

  • 作者单位

    Laboratory of Microbiology, Wageningen University,Dreijenplein 10, 6703 HB Wageningen, The Netherlands,Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, 28359 Bremen, Germany;

    rnLaboratory of Microbiology, Wageningen University,Dreijenplein 10, 6703 HB Wageningen, The Netherlands;

  • 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
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号