Photodegradation Mechanism of UV-328 in Natural Organic Matter Contexts Under Simulated Solar Irradiation

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

2-(Benzotriazol-2-yl)-4,6-bis(2-methylbutan-2-yl)phenol (UV-328), a widely utilized UV absorber in plastics and diverse products, has been frequently detected the environment; yet, research on its photochemical degradation is scarce. Dissolved organic matter (DOM) particulate (POM), as important components of natural matter, can produce photosensitization by absorbing photons. This study examined influence DOM from various sources photodegradation UV-328 under simulated daylight conditions. Experiments revealed that excited triplet (3DOM*) primary factor enhancing UV-328. Utilizing excitation-emission matrix spectroscopy combined with parallel analysis (EEMs-PARAFAC) seawater ultrafiltration experiments, it was demonstrated high molecular weight DOM, particularly autochthonous produced seawater, could more rapidly photodegrade Additionally, suspended (SPM) influenced inorganic ions, acids, contributing to positive feedback effect process. The pathways products were first elucidated using ultraperformance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS), supplemented density functional theory (DFT) calculations. provides novel insights into mechanisms combining POM for time.

Language: Английский

Occurrence, spatial distribution, and ecological risk of benzotriazole UV stabilizers (BUVs) in sediments from Bohai sea of China

Environmental Research, Journal Year: 2024, Volume and Issue: 260, P. 119730 - 119730

Published: Aug. 6, 2024

Language: Английский