Enhanced reductive degradation of methyl orange in a microbial fuel cell through cathode modification with redox mediators

2010 ◽  
Vol 89 (1) ◽  
pp. 201-208 ◽  
Author(s):  
Rong-Hua Liu ◽  
Guo-Ping Sheng ◽  
Min Sun ◽  
Guo-Long Zang ◽  
Wen-Wei Li ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Methyl Orange ◽  
Microbial Fuel Cell ◽  
Redox Mediators ◽  
Reductive Degradation ◽  
Degradation Of Methyl Orange

Simultaneous Electricity Generation and Electrochemical Decolorization of Azo Dyes in Microbial Fuel Cells

2013 ◽  
Vol 291-294 ◽  
pp. 602-605 ◽  
Author(s):  
Liang Liu ◽  
Wen Yi Zhang
Keyword(s):  
Fuel Cell ◽  
Methyl Orange ◽  
Microbial Fuel Cell ◽  
Azo Dyes ◽  
Microbial Fuel Cells ◽  
Azo Dye ◽  
Electricity Generation ◽  
Sulfanilic Acid ◽  
Maximum Power Density ◽  
K Value

In this study we investigated the use of a microbial fuel cell (MFC) to abioticlly cathodic decolorization of a model azo dye, Methyl Orange (MO). Experimental results showed that electricity could be continuously generated the MO-fed MFC and MO was successfully decolorized in the cathode. The decolorization rate was highly dependent on the catholyte pH. When pH was varied from 3.0 to 9.0, the k value in relation to MO degradation decreased from 0.298 to 0.016 μmol min-1, and the maximum power density decreased from 34.77 to 1.51 mW m-2. Sulfanilic acid and N,N-dimethyl-p-phenylenediamine were identified as the decolorization products of MO by HPLC-MS.

scholarly journals Preferential Use of an Anode as an Electron Acceptor by an Acidophilic Bacterium in the Presence of Oxygen

2008 ◽  
Vol 74 (14) ◽  
pp. 4472-4476 ◽  
Author(s):  
Moustafa Malki ◽  
Antonio L. De Lacey ◽  
Nuria Rodríguez ◽  
Ricardo Amils ◽  
Victor M. Fernandez
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Reference Standard ◽  
Redox Mediators ◽  
Standard Calomel Electrode ◽  
Acidophilic Bacterium ◽  
Cathodic Compartment ◽  
Reducing Bacteria ◽  
Metal Reducing Bacteria ◽  
Felt Electrodes

ABSTRACT Several anaerobic metal-reducing bacteria have been shown to be able to donate electrons directly to an electrode. This property is of great interest for microbial fuel cell development. To date, microbial fuel cell design requires avoiding O2 diffusion from the cathodic compartment to the sensitive anodic compartment. Here, we show that Acidiphilium sp. strain 3.2 Sup 5 cells that were isolated from an extreme acidic environment are able to colonize graphite felt electrodes. These bacterial electrodes were able to produce high-density electrocatalytic currents, up to 3 A/m2 at a poised potential of +0.15 V (compared to the value for the reference standard calomel electrode) in the absence of redox mediators, by oxidizing glucose even at saturating air concentrations and very low pHs.

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