Insights into the photochemical transformation pathways of triclosan and 2′-HO-BDE-28

Effects of dissolved organic matter on phototransformation rates and dioxin products of triclosan and 2′-HO-BDE-28 in estuarine water

“…The yields of 2,8-DCDD are higher than those of 2,8-DBDD in both PBS and AEW, which is in accordance with the results of our previous study. 46…”

Aquatic photolysis of strobilurin fungicide kresoxim-methyl: kinetics, pathways, and effects of adjuvants

“…The apparent quantum yield of KM ( Φ KM ) was determined by using p -nitroanisole (PNA)/pyr as chemical actinometers. 20 The apparent photodegradation rates of KM and PNA ( k KM and k PNA , respectively) were calculated as follows: 21 k A = −ln(d[A]/d t ) Φ PNA = 0.29[pyr] + 0.00029where [A] represents the concentrations of KM or PNA, and d [A]/d t is the corresponding photodegradation rate, while L λ and ε λ represent the irradiance of the incident photon and molar absorptivity of KM or PNA at wavelength λ , respectively. Φ KM and Φ PNA represent the quantum yields of KM and PNA, respectively, and [pyr] is the concentration of pyridine.…”

“…The apparent quantum yield of KM (F KM ) was determined by using p-nitroanisole (PNA)/pyr as chemical actinometers. 20 The apparent photodegradation rates of KM and PNA (k KM and k PNA , respectively) were calculated as follows: 21 F KM and F PNA represent the quantum yields of KM and PNA, respectively, and [pyr] is the concentration of pyridine.…”

Development of a quantitative structure–activity relationship model for predicting quantum yield of hydroxyl radical generation from organic compounds

“…6,7 In natural fresh water and marine water, dissolved organic matter (DOM) consists of many organic molecules from natural sources, in which molecular structures are still poorly characterized due to their structural complexity. 8 Besides DOM, chromophoric organic pollutants can also produce cOH under sunlight irradiation, such as triclosan 9 and uoroquinolone antibiotics; 10 the information on the quantum yield of the photo-generation of cOH from organic small molecules and DOM is the basis for estimating its environmental concentration, and the generation of cOH is determined by the molecular structures of the organic pollutants and the organic molecules in DOM. However, on one hand, it is difficult to experimentally determine the quantum yield of cOH produced by a wide variety of organic pollutants; and on the other hand, the structure of natural DOM is complex and it differs when from different sources.…”