Photochemical transformations of 2, 6-dichlorophenol and 2-chlorophenol with superoxide ions in the atmospheric aqueous phase

Zhu, Mengyu; Dong, Linchang; Hu, Shuheng; Peng, Shuchuan; Zhu, Chengzhu

doi:10.1016/j.molstruc.2022.132910

Cited by 9 publications

(2 citation statements)

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“…As can be seen from the data, the presence of riboflavin resulted in the acceleration of the transformation efficiency of IZM. According to the published study, reactive oxygen species including singlet oxygen, hydroxyl radicals, and superoxide anion-excited triplet photosensitizers can be generated from excited riboflavin. , …”

Section: Resultsmentioning

confidence: 99%

“…According to the published study, reactive oxygen species including singlet oxygen, hydroxyl radicals, and superoxide anion-excited triplet photosensitizers can be generated from excited riboflavin. 37,38 TP Analysis. In order to analyze the photolysis products of IZM in natural conditions, photolysis solutions of IZM under simulated sunlight were analyzed by UHPLC-Q-TOF-MS. A total of nine TPs were detected under simulated solar light, and the corresponding MS2 spectra are illustrated in Figures S5− S13).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Photodegradation of the Fungicide Isopyrazam in Aqueous Solution: Kinetics, Photolytic Pathways, and Aquatic Toxicity

Zhao

Chen

2023

J. Agric. Food Chem.

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Photodegradation behavior of a new fungicide isopyrazam in water under simulated sunlight and ultraviolet (UV) irradiation was studied. The photolysis half-life (t 1/2 ) of isopyrazam in purified water was 195 h under simulated sunlight, which was decreased to 46−88 h, 28−51 h, and 13−18 h in the presence of NO 3 − , Fe 3+ , and riboflavin, respectively. UV irradiation accelerated the photolysis of isopyrazam with a half-life of 30 min and revealed varied degradation rates in acidic (0.011 min −1 ), neutral (0.024 min −1 ), and alkaline solutions (0.022 min −1 ). Nine transformation products under simulated sunlight and UV were found, and photolytic pathways were proposed to include cleavage of C−N bonds, hydroxylation, nitration, demethylation, dehydrofluorination, and photoisomerization. The acute toxicity of defluorinated isopyrazam (TP 4) and the chronic toxicity of isomerized isopyrazam (TP 9) to aquatic organisms were approximately twice that of isopyrazam. These findings provide insights into environmental risk assessment and management of water pollution.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%