Sustainability, Год журнала: 2025, Номер 17(8), С. 3333 - 3333

Опубликована: Апрель 9, 2025

This study examines the degradation of sulfamethoxazole (SMX) in water using photo-Fenton process, focusing on dissolved oxygen (DO) dynamics, organic matter mineralization, and quality improvement. The results show that SMX follows a rapid kinetic pattern, achieving complete removal within 30 min. However, total carbon reduction occurs more gradually, indicating persistence intermediates before full mineralization into CO2 H2O. DO evolution biphasic trend: an initial decline due to oxidative consumption, followed by increase H2O2 decomposition O2. Initially, at [H2O2]0 ≥ 3.0 mM, sharply increases, while [Fe(II)]0 = 5.0 mg/L, reaches minimum 0.3 mg/L higher reactive species (ROS) production. Water parameters such as color, turbidity, aromaticity were also monitored. Aromaticity significantly decreases min, confirming ring cleavage. Color turbidity initially intensify intermediate formation but later decrease progresses. Optimal conditions (1 mol SMX: 10 H2O2: 0.05 Fe(II)) ensure efficient with minimal depletion without excessive scavenging effects. These findings confirm process effectively removes improving quality, making it sustainable alternative for pharmaceutical wastewater treatment.

Язык: Английский