Continuous measurement of acute toxicity in water using a solid state microrespirometer

This work presents the first true solid-state microrespirometer. It consists on a naturally developed biofilm of Pseudomonas aeruginosa over a Nafion modified array of gold microdisc electrodes. Such a device can be used to monitor acute toxicity in water streams based on the oxygen reduction curren...

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Bibliographic Details
Published inSensors and actuators. B, Chemical Vol. 126; no. 2; pp. 515 - 521
Main Authors Del Campo, Fco. Javier, Ordeig, Olga, Vigués, Nuria, Godino, Neus, Mas, Jordi, Muñoz, Francesc Xavier
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2007
Subjects
Biofilm
Linear sweep voltammetry
Microrespirometry
Oxygen reduction
Ultramicroelectrode arrays
Linear sweep voltammetry
Microrespirometry
Biofilm
Oxygen reduction
Ultramicroelectrode arrays
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Summary:This work presents the first true solid-state microrespirometer. It consists on a naturally developed biofilm of Pseudomonas aeruginosa over a Nafion modified array of gold microdisc electrodes. Such a device can be used to monitor acute toxicity in water streams based on the oxygen reduction current recorded at the microelectrode array. When a healthy biofilm is exposed to a toxic stream the bacteria conforming stop breathing which results in an immediate increase of the oxygen supply reaching the microelectrode array. The fabrication and use of such a microrespirometer is described, and a possible operation mode for a real application is presented. Given that different waters may contain toxic compounds of diverse nature, the respirometer presented here provides qualitative information only.
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ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2007.03.038