Impedance water pollution sensor integrated on glass

Abstract :
Quality of water resources is a major global challenge and water pollution is a daily topic. Certain pollutants can affect bacterial viability and destroy cell walls depending on their concentration. It leads to the spreading of cytoplasm cell ions in the medium by diffusion. Hence, studying the conductivity and permittivity of a bacterial solution is used to investigate cell wall viability. By extension, the presence of specific pollutants can be deduced.
This seminar focuses on the analysis of bacterial solutions by impedance spectroscopy. We use alive and treated Escherichia coli samples at different concentrations, using parallel-plate electrodes. The simulation of a bacteria dielectric behavior in COMSOL will also be discussed.
The use of the Distribution of Relaxation Times (DRT) has enabled the study of bacterial solutions treated with pollutants (antibiotics and anti-helminthic).
These results have demonstrated the potential of this biosensor prototype.