Electron transfer and biofilm formation of Shewanella putrefaciens as function of anode potential

被引：117

作者：

Carmona-Martinez, Alessandro A. ^{[1
]}

Harnisch, Falk ^{[1
]}

Kuhlicke, Ute ^{[2
]}

Neu, Thomas R. ^{[2
]}

Schroeder, Uwe ^{[1
]}

机构：

[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Environm & Sustainable Chem, D-38106 Braunschweig, Germany

[2] UFZ Helmholtz Ctr Environm Res, Dept River Ecol, D-39114 Magdeburg, Germany

来源：

BIOELECTROCHEMISTRY | 2013年 / 93卷

关键词：

Microbial bioelectrochemical systems; Microbial fuel cells; Bacterial electron transfer; Shewanella putrefaciens; Cyclic voltammetry; MICROBIAL FUEL-CELL; METAL-REDUCING BACTERIUM; C-TYPE CYTOCHROMES; ONEIDENSIS MR-1; OXIDE REDUCTION; GEOBACTER-SULFURREDUCENS; DIRECT ELECTROCHEMISTRY; TRANSFER MECHANISMS; NANOWIRE NETWORKS; ORGANIC-COMPOUNDS;

D O I：

10.1016/j.bioelechem.2012.05.002

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Shewanellaceae are among the most widely studied electroactive microorganisms. In this report, we studied the influence of the applied electrode potential on the anodic current production of Shewanella putrefaciens NCTC 10695 under anoxic conditions. Furthermore, we used cyclic voltammetry (CV) and confocal laser scanning microscopy (CLSM) to investigate the microbial electron transfer and biofilm formation. It is shown that the chronoamperometric current density is increasing with increasing electrode potential from 3 mu A cm(-2) at -0.1 V up to similar to 12 mu A cm(-2) at +0.4 V (vs. Ag/AgCl), which is accompanied by an increasing amount of biomass deposited on the electrode. By means of cyclic voltammetty we demonstrate that direct electron transfer (DET) is dominating and the planktonic cells play only a minor role. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：23 / 29

页数：7

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