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Open AccessArticle

Development of a Biosensor for Environmental Monitoring Based on Microalgae Immobilized in Silica Hydrogels

1
Université de Lyon, ENTPE, CNRS, UMR5023 LEHNA, Rue Maurice Audin, 69518 Vaulx-en-Velin, France
2
INQUIMAE-DQIAQF, Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria Pab. II, C1428EHA Buenos Aires, Argentina
*
Authors to whom correspondence should be addressed.
Sensors 2012, 12(12), 16879-16891; https://doi.org/10.3390/s121216879
Received: 29 October 2012 / Revised: 30 November 2012 / Accepted: 4 December 2012 / Published: 6 December 2012
(This article belongs to the Special Issue Live Cell-Based Sensors)
A new biosensor was designed for the assessment of aquatic environment quality. Three microalgae were used as toxicity bioindicators: Chlorella vulgaris, Pseudokirchneriella subcapitata and Chlamydomonas reinhardtii. These microalgae were immobilized in alginate and silica hydrogels in a two step procedure. After studying the growth rate of entrapped cells, chlorophyll fluorescence was measured after exposure to (3-(3,4-dichlorophenyl)-1,1-dimethylurea) (DCMU) and various concentrations of the common herbicide atrazine. Microalgae are very sensitive to herbicides and detection of fluorescence enhancement with very good efficiency was realized. The best detection limit was 0.1 µM, obtained with the strain C. reinhardtii after 40 minutes of exposure. View Full-Text
Keywords: biosensor; algae; chlorophyll fluorescence; DCMU; atrazine; sol-gel; herbicides biosensor; algae; chlorophyll fluorescence; DCMU; atrazine; sol-gel; herbicides
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MDPI and ACS Style

Ferro, Y.; Perullini, M.; Jobbagy, M.; Bilmes, S.A.; Durrieu, C. Development of a Biosensor for Environmental Monitoring Based on Microalgae Immobilized in Silica Hydrogels. Sensors 2012, 12, 16879-16891.

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