Hydroponic phytoremediation of antimony by Tamarix smyrnensis and Nerium oleanderHydroponic phytoremediation of antimony by Tamarix smyrnensis and Nerium oleander Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2025-03-282023enBackground: Antimony (Sb) is considered a priority pollutant and its removal from the environment is of great importance. Among the various treatments, phytoremediation is considered an efficient method when the accumulation of this metalloid in plant tissues is sufficiently high. This work focused on removal of Sb(III) from aqueous solution at two Sb concentrations (5 and 10 ppm) and using salt as stressor (100 mmol L−1) only at the lowest Sb concentration (5 ppm). The response of two salt-tolerant plant species – Tamarix smyrnensis and Nerium oleander – was monitored when subjected to Sb-contaminated hydroponic solutions. Results: Plant growth and water content remained unaltered within the 15-day experimental period, while the chlorophyll content declined significantly at the higher Sb level (10 ppm) only for N. oleander. The antioxidant enzymatic activity in T. smyrnensis with respect to guaiacol peroxidase (GPOD) and catalase (CAT) was significantly increased in the treatment under Sb and salt stress. In N. oleander there was a strong increase in GPOD activity by the exposure to Sb, whereas the CAT activity was increased considerably with the presence of salinity. Sb concentration was detected on the surface of the leaves, indicating that excretion occurred in both plants. Increased accumulation was observed in N. oleander in the absence of salinity whereas, under salt stress, Sb accumulation was considerably higher (60%) in T. smyrnensis. Notably, both plants could accumulate a high amount of Sb, preferentially in the roots, with the concentrations in the leaves being significantly lower. Conclusion: The experimental results from this study demonstrate that both plants are suitable for phytoremediation due to substantial Sb accumulation without visible Sb toxicity.Financial support by the European Union's Horizon 2020 project ‘ELECTRA’ under grant agreement No. 826244 is highly appreciated.http://creativecommons.org/licenses/by-nc-nd/4.0/Journal of Chemical Technology and Biotechnology9892214–2223Seridou_et_al_J. Chem. Technol. Biotechnol._98(9)_2023.pdfChania [Greece]Library of TUC2025-03-28application/pdf742.4 kBfree Seridou Petroula Σεριδου Πετρουλα Fyntrilakis Konstantinos Φυντριλακης Κωνσταντινος Syranidou Evdokia Συρανιδου Ευδοκια Kalogerakis Nikos Καλογερακης Νικος Wiley Antimony Hydroponic Phytoremediation T. smyrnensis N. oleander