Assessment of toxicity and endocrine-disrupting activity of bisphenol analogues during ozone and UV treatments in zebrafish eleutheroembryos.

In recent decades, increased regulations on the use of bisphenol A (BPA) have prompted a surge in the use of BPA alternatives. Consequently, a widespread occurrence of BPA substitutes in aquatic environments is currently being detected. While some evidence exists about the degradation of these compounds through various water treatment technologies, the evolution of the resulting toxicity and endocrine-disrupting activity during these processes remains scarcely evaluated.

Hydroxyl radical and UV-induced reactions of bisphenol analogues in water: Kinetics, transformation products and estrogenic activity estimation.

There is currently a concern about the endocrine-disrupting capacity of many bisphenol A substitutes, such as BPAF, BPAP, BPB, BPC, BPC-Cl, BPE, BPF, BPS and BPZ in natural waters. However, fundamental data (i.e.

Reactions of bisphenol F and bisphenol S with ozone and hydroxyl radical: Kinetics and mechanisms.

Bisphenol F (BPF) and bisphenol S (BPS) are the most employed substitutes of bisphenol A (BPA), after being restricted by legislation in different countries because of its endocrine disrupting behaviour. In the present work, a deep study was performed about the reactivity of BPF and BPS with ozone and hydroxyl radical. Firstly, the second order rate constants of ozone with the di-protonated, mono-protonated and deprotonated species of both bisphenols were determined to be 2.

Photocatalytic degradation of sulfamethoxazole using TiO in simulated seawater: Evidence for direct formation of reactive halogen species and halogenated by-products.

Nowadays photoactivation mechanism of titanium dioxide nanoparticles (TiO NPs) and reactive species involved in saline waters is not sufficiently established. In this study, TiO photocatalytic process under simulated solar irradiation was evaluated in synthetic seawater and compared with deionized water, using sulfamethoxazole (SMX) as model organic compound. For a TiO concentration of 100 mg L, SMX degradation resulted two times slower in seawater than in deionized water by the determination of their pseudo-first order rate constants of 0.