The Science of The Total Environment, Год журнала: 2024, Номер 956, С. 177320 - 177320
Опубликована: Ноя. 8, 2024
Язык: Английский
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
ACS ES&T Water, Год журнала: 2025, Номер unknown
Опубликована: Апрель 10, 2025
Krypton chloride (KrCl*) excimer lamps emitting far-UVC 222 nm light have emerged as a promising alternative technology to conventional low-pressure UV (LPUV) at 254 nm. Herein, the suitability of for photodegradation 12 haloacetonitrile and haloacetamide disinfection byproducts (DBPs) was investigated. Photolysis all these nitrogenous DBPs is significantly enhanced nm, compared The photolysis rate constants (k = 7.96 × 103 - 1.60 106 cm2·Einstein-1) quantum yields (Φ222 0.049-14.43) are 3-56 1.2-4.5 times greater, respectively. haloacetamides faster than that haloacetonitriles increases with number halogens on DBPs. Bromo-DBPs feature much chloro-DBPs within same structural class. rates strongly correlate DBP molar absorption coefficients (ε) energy gap between highest occupied lowest unoccupied orbitals (E HOMO E LUMO), indicating importance photoexcitation. Nitrate natural organic matter in water cast considerable light-screening effects but also generate reactive species play role degradation These findings useful further developing far-UVC-based mitigate contamination.
Язык: Английский
Процитировано
0
Water Research, Год журнала: 2025, Номер 283, С. 123754 - 123754
Опубликована: Май 1, 2025
Язык: Английский
Процитировано
0
Process Safety and Environmental Protection, Год журнала: 2025, Номер 199, С. 107327 - 107327
Опубликована: Май 20, 2025
Язык: Английский
Процитировано
0
Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 164039 - 164039
Опубликована: Май 1, 2025
Язык: Английский
Процитировано
0
Toxics, Год журнала: 2025, Номер 13(6), С. 450 - 450
Опубликована: Май 29, 2025
Photochemical degradation is a major removal pathway for pharmaceutical pollutants in water, and dissolved organic matter (DOM) water an important factor affecting this process. This study investigates the differential effects of seasonally-varied from Songhua River Liao on photodegradation pollutants, using levofloxacin (LFX), sulfamethoxazole (SMZ), ibuprofen (IBP) as target compounds. The results demonstrated that summer autumn DOM inhibited LFX SMZ through light screening dynamic quenching effects, with inhibition rates 35.1% 55.5%, respectively, whereas winter enhanced photo-oxidation mechanisms. significantly promoted IBP. Quenching experiments showed differences contributions photochemically reactive intermediates (PPRIs) to different hydroxyl radicals (•OH) dominating (48.79% contribution), excited triplet states (3DOM*) (85.20% singlet oxygen (1O2) IBP (79.89% contribution). pathways were elucidated by measuring by-products pollutants: mainly underwent piperazine ring cleavage oxidative decarboxylation, isoxazole opening deamination during photodegradation, photodecarboxylation oxidation reactions. Under influence River, generation multiple led increasing trend acute toxicity luminescent bacteria. investigation elucidates dual regulatory mechanisms natural aquatic both photo-induced evolution dynamics contaminants, which great significance understanding photochemical transformation behavior risk assessment environments.
Язык: Английский
Процитировано
0
The Science of The Total Environment, Год журнала: 2024, Номер 956, С. 177320 - 177320
Опубликована: Ноя. 8, 2024
Язык: Английский
Процитировано
1