Ben Ouada S. auteur aut IRD Ben Ali R. auteur aut IRD Cimetiere N. auteur aut IRD Leboulanger Christophe auteur aut IRD Ben Ouada H. auteur aut IRD Sayadi S. auteur aut IRD text journalArticle eng text/pdf born digital access The aim of the present study was to provide an integrated view of algal removal of diclofenac (DCF). Two isolated microalgal strains Picocystis sp. and Graesiella sp. were cultivated under different DCF concentrations and their growth, photosynthetic activity and diclofenac removal efficiency were monitored. Results showed that DCF had slight inhibitory effects on the microalgal growth which did not exceed 21% for Picocystis and 36% for Graesiella after 5 days. Both species showed different patterns in terms of removal efficiency. In presence of Picocystis sp., the amounts of removed DCF were up to 73%, 43% and 25% of 25, 50 and 100 mg L-1 respectively; whereas only 52%, 28% and 24% were removed in the presence of Graesiella at same DCF tested concentrations. DCF removal was insured mainly by biodegradation. To better reveal the mechanism involved, metabolites analyses were performed. Two DCF biodegradation/biotransformation products were detected in presence of Picocystis. This study indicated that Picocystis performed a satisfactory growth capacity and DCF removal efficiency and thus could be used for treatment of DCF contaminated aqueous systems. specialized Microalgae Extremophiles Diclofenac Removal Biodegradation Biotransformation 020 034 038 084 186 art. 109769 [9 p.] 2019 0147-6513 https://www.documentation.ird.fr/hor/fdi:010077339 10.1016/j.ecoenv.2019.109769 0147-6513 [F B010077339] https://www.documentation.ird.fr/hor/fdi:010077339 https://www.documentation.ird.fr/intranet/publi/2019/12/010077339.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2020-01-07 2025-02-24 fdi:010077339 fre