Title
Effect of toxic components on microbial fuel cell-polarization curves and estimation of the type of toxic inhibition
Author
Stein, N.E.
Hamelers, H.V.M.
van Straten, G.
Keesman, K.J.
Publication year
2012
Abstract
Polarization curves are of paramount importance for the detection of toxic components in microbial fuel cell (MFC) based biosensors. In this study, polarization curves were made under non-toxic conditions and under toxic conditions after the addition of various concentrations of nickel, bentazon, sodiumdodecyl sulfate and potassium ferricyanide. The experimental polarization curves show that toxic components have an effect on the electrochemically active bacteria in the cell. (Extended) Butler Volmer Monod (BVM) models were used to describe the polarization curves of the MFC under nontoxic and toxic conditions. It was possible to properly fit the (extended) BVM models using linear regression techniques to the polarization curves and to distinguish between different types of kinetic inhibitions. For each of the toxic components, the value of the kinetic inhibition constant Ki was also estimated from the experimental data. The value of Ki indicates the sensitivity of the sensor for a specific component and thus can be used for the selection of the biosensor for a toxic component. © 2012 by the authors.
Subject
Earth & Environment
WT - Water Treatment
EELS - Earth, Environmental and Life Sciences
Urban Development
Environment
Built Environment
Biosensor
Least square estimation
Linear regression
Microbial fuel cell
Toxicity detection
bentazon
dodecyl sulfate sodium
nickel
potassium ferricyanide
analytical parameters
article
bacterial cell
biosensor
cell polarity
controlled study
kinetics
microbial fuel cell
model
nonhuman
polarization curve
sensitivity and specificity
toxicity testing
bentazon, 25057-89-0
dodecyl sulfate sodium
nickel
potassium ferricyanide
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http://resolver.tudelft.nl/uuid:f1549315-cad3-4c1f-a262-fa1ee4f60327
TNO identifier
474214
ISSN
2079-6374
Source
Biosensors, 2 (3), 255-268
Document type
article