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    双室电化学体系中产电微生物与黄铁矿单晶协同电子转移反应

    丁竑瑞 李艳 鲁安怀

    丁竑瑞, 李艳, 鲁安怀, 2012. 双室电化学体系中产电微生物与黄铁矿单晶协同电子转移反应. 地球科学, 37(2): 313-318. doi: 10.3799/dqkx.2012.035
    引用本文: 丁竑瑞, 李艳, 鲁安怀, 2012. 双室电化学体系中产电微生物与黄铁矿单晶协同电子转移反应. 地球科学, 37(2): 313-318. doi: 10.3799/dqkx.2012.035
    DING Hong-rui, LI Yan, LU An-huai, 2012. Electrochemical Study on Electron Transfer Process between Electricigens and Single Crystal Pyrite in a Dual-Chambered Equipment. Earth Science, 37(2): 313-318. doi: 10.3799/dqkx.2012.035
    Citation: DING Hong-rui, LI Yan, LU An-huai, 2012. Electrochemical Study on Electron Transfer Process between Electricigens and Single Crystal Pyrite in a Dual-Chambered Equipment. Earth Science, 37(2): 313-318. doi: 10.3799/dqkx.2012.035

    双室电化学体系中产电微生物与黄铁矿单晶协同电子转移反应

    doi: 10.3799/dqkx.2012.035
    基金项目: 

    国家重点基础研究发展计划项目 2007CB815602

    详细信息
      作者简介:

      丁竑瑞(1985-), 男, 博士, 主要从事环境矿物学研究.E-mail: dhr_100@163.com

    • 中图分类号: P578.2;X78

    Electrochemical Study on Electron Transfer Process between Electricigens and Single Crystal Pyrite in a Dual-Chambered Equipment

    • 摘要: 通过构建产电微生物—黄铁矿双室体系, 应用电化学方法对以黄铁矿单晶电极作为产电微生物电子受体时, 两者间的电子转移过程进行表征和分析.结果显示, 与惰性石墨电极相比, 以黄铁矿单晶作为产电微生物电子受体时, 体系最大功率密度提升132.9%;电化学阻抗谱显示, 黄铁矿单晶电极极化电阻降低98.8%, 表现出优良的电化学反应特性, 表明产电微生物与黄铁矿单晶间具有良好的电子转移活性.籍由产电微生物对底物的氧化作用, 与黄铁矿单晶接受产电微生物电子在0.34 V(相对于饱和甘汞电极)处发生的还原反应, 构成了两者间完整的协同电子转移过程.

       

    • 图  1  产电微生物—黄铁矿双室研究体系示意

      Fig.  1.  Schematic diagram of electricigen-pyrite system in a dual-chambered setup

      图  2  黄铁矿/石墨电极电流密度-负载曲线

      Fig.  2.  Current density-out loader curve of pyrite and graphite electrode

      图  3  黄铁矿/石墨电极功率密度曲线

      Fig.  3.  Power density curve of pyrite and graphite electrode

      图  4  黄铁矿/石墨电极阴极电极电势-电流密度曲线

      Fig.  4.  Potential-current density curve of pyrite and graphite electrode as cathode

      图  5  黄铁矿电极/石墨对照EIS拟合结果

      Fig.  5.  EIS fitting results of pyrite electrode and graphite as control

      图  6  黄铁矿电极/石墨对照循环伏安结果

      Fig.  6.  CV results of pyrite and graphite electrode

      图  7  不同溶解氧条件下黄铁矿电极线性扫描伏安结果

      Fig.  7.  LSV results of pyrite electrode under different DO concentrations

      表  1  黄铁矿电极/石墨对照EIS拟合参数

      Table  1.   Fit parameters for EIS of pyrite electrode and graphite as control

      参数 黄铁矿 石墨对照
      Rp(Ω) 30.35 2 523
      Rs (Ω) 4.059 2.256
      C(F) 0.002 475 0.037 26
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    出版历程
    • 收稿日期:  2010-08-12
    • 刊出日期:  2012-03-15

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