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Article Dans Une Revue Journal of Applied Phycology Année : 2018

Effect and removal of bisphenol A by two extremophilic microalgal strains (Chlorophyta)

Résumé

The effects and the removal efficiency of bisphenol A (BPA) on two extremophilic Chlorophyta strains, an alkaliphilic Picocystis and a thermophilic Graesiella, were assessed. BPA was shown to inhibit the growth and photosynthesis of both species, but to a greater extent for Graesiella. The growth IC50 (4 days) was 32 mg L-1 for Graesiella and higher than 75 mg L-1 for Picocystis. Oxidative stress was induced in both strains when exposed to increasing BPA concentrations, as evidenced by increased malondialdehyde content. BPA exposure also resulted in an over-expression of antioxidant activities (ascorbate peroxidase, glutathione S-transferase and catalase) in Picocystis whereas they were repressed in Graesiella. Both species exhibited high BPA removal efficiency, reaching 72% for Picocystis and 52.6% for Graesiella at 25 mg L-1 . BPA removal was mostly attributed to biodegradation for both species. Overall, according to its extended tolerance and its removal capacity, Picocystis appeared to be a promising species for the BPA bioremediation even at high contamination levels.
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Dates et versions

hal-01826620 , version 1 (17-03-2023)

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Sabrine Ben Ouada, Rihab Ben Ali, Christophe Leboulanger, Hatem Zaghden, Sirine Choura, et al.. Effect and removal of bisphenol A by two extremophilic microalgal strains (Chlorophyta). Journal of Applied Phycology, 2018, 30 (3), pp.1765--1776. ⟨10.1007/s10811-017-1386-x⟩. ⟨hal-01826620⟩
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