Fig. 10. Degradation kinetics in water of the studied pesticides (0.1 mg L⁻¹) by photolysis (with and without SF) and heterogeneous photocatalysis (SF/TiO₂ and TiO₂ nanopowder) during the photoperiod. Approximately 250 mg L⁻¹ of TiO₂ in all cases. Error bars denote standard deviation (n = 3).