GONGI, Wejdene; TOUZI, Hassen; SADLY, Idris; BEN OUADA, Hafedh; TAMARIN, Ollivier; BEN OUADA, Hatem

doi:10.1007/s10924-022-02555-6

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Journal of Polymers and the Environment. 2022-11-01, vol. 30, n° 11, p. 4738-4748

Résumé en anglais

Cyanobacterial extracellular polymeric substances “EPS” have attracted intensive concern in biomedicine and food. Nevertheless, the use of those polymers as a sensor coating material has not yet been investigated mainly for microplastic detection. This study focuses on the application of EPS as a sensitive membrane deposited on a gold electrode and investigated with electrochemical impedance spectroscopy to detect four types of microplastics with a size range of 0.1 µm to 1 mm. The surface properties of this impedimetric sensor were investigated by Scanning electron microscopy, Fourier transforms infrared spectroscopy, and X-ray spectroscopy and, showed a high homogenous structure with the presence of several functional groups. The EPS-based sensor could detect the four tested microplastics with a low limit of detection of 10–11 M. It is the first report focusing on EPS extracted from cyanobacteria that could be a new quantification method for low concentrations of microplastics.< Réduire

Mots clés

Extracellular polymeric substances

Impedimetric biosensor

Electrochemical impedance spectroscopy

Microplastics detection

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https://oskar-bordeaux.fr/handle/20.500.12278/172292

DOI

http://dx.doi.org/10.1007/s10924-022-02555-6

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IMS : Laboratoire de l'Intégration du Matériau au Système - UMR 5218

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A Novel Impedimetric Sensor Based on Cyanobacterial Extracellular Polymeric Substances for Microplastics Detection

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