Simulated solar driven photolytic ozonation for the oxidation of aqueous recalcitrant-to-ozone tritosulfuron. Transformation products and toxicity Rodríguez Solís, Rafael Gimeno, Olga Rivas, F. Javier Beltrán, Fernando J. Ozone Simulated solar radiation Tritosulfuron Transformation products Toxicity The authors are grateful to Junta de Extremadura (Project IB16022), co-financed by the European Funds for Regional Development, for economically supporting this work. Moreover, it is also acknowledged the ‘Servicio de Análisis Elemental y Molecular (SAEM)’ of ‘Servicios de Apoyo a la Investigación de la Universidad de Extremadura (SAIUex)’ for the helping with the intermediate products analyses. This work reports the combination of ozone and solar radiation as an advanced oxidation process to remove the herbicide tritosufuron (TSF) in water. Firstly, the recalcitrance of TSF has been assessed, obtaining an ozonation second order rate constant of 5–154 M−1 min−1 in the range of pH from 5 to 8; while the rate constant with HOradical dot was found to be (1.8–3.1)·109 M−1 s−1. Secondly, the simultaneous application of simulated solar radiation in between 300 and 800 nm and ozone resulted positive in the oxidation rate of TSF. Mineralization extent was also higher. Less effective oxidation was achieved after limiting the radiation to the range 360–800 nm or 390–800 nm; also completely inappropriate for mineralization. Thirdly, the detected transformation products (TPs) demonstrated the vulnerability of TSF molecule to be attacked by HOradical dot in the sulfonylurea bridge. The combination of ozone and radiation of 300–800 nm led to the most effective removal of the TPs. Finally, after the photolytic ozonation treatment toxicity was also evaluated in terms of phytotoxicity towards the germination and root elongation of Lactuca Sativa seeds, and toxicity by immobilization tests of Daphnia Magna. 2024-01-17T12:23:34Z 2024-01-17T12:23:34Z 2018 journal article Published version: Rodríguez Solís, R. et al. Simulated solar driven photolytic ozonation for the oxidation of aqueous recalcitrant-to-ozone tritosulfuron. Transformation products and toxicity. Journal of Environmental Management 233, 2019, 513-522. [https://doi.org/10.1016/j.jenvman.2018.12.068] https://hdl.handle.net/10481/86856 10.1016/j.jenvman.2018.12.068 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional