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Improved electrical wiring of microbes: anthraquinone-modified electrodes for biosensing of chlorinated hydrocarbons

Paper ID Volume ID Publish Year Pages File Format Full-Text
33541 44983 2011 6 PDF Available
Title
Improved electrical wiring of microbes: anthraquinone-modified electrodes for biosensing of chlorinated hydrocarbons
Abstract

The present study reports the development of a novel bioelectrochemical sensor for trichloroethene (TCE), a common subsurface contaminant, based on the measurement of the electrical current resulting from the microbially catalysed reduction of TCE at anthraquinone (AQ)-modified electrodes. Firstly, we describe the development and electrochemical characterisation of AQ-modified electrodes, prepared via spontaneous or electrochemical reduction of AQ diazonium derivatives. Finally, the proof-of-principle of the bioelectrochemical sensor for TCE was evaluated, using a TCE-dechlorinating microbial culture as the biosensing element. The response of the bioelectrochemical sensor was measured either as the peak current in cyclic voltammetry or the steady-state current in chronoamperometry; in both cases, it was found to be proportional to TCE concentrations in the range 0–100 μmol/L. On the other hand, the microorganisms in contact with the electrode surface caused severe fouling problems which drastically reduced the life-time of the sensor.

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Improved electrical wiring of microbes: anthraquinone-modified electrodes for biosensing of chlorinated hydrocarbons
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Publisher
Database: Elsevier - ScienceDirect
Journal: New Biotechnology - Volume 29, Issue 1, 15 December 2011, Pages 126–131
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
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