Photodegradation of Diquat in water under UV irradiation: Identification of transformation products and elucidation of photodegradation pathway
文献类型： 外文期刊
作者： Wang, Fangyuan 1 ; Tao, Bo 2 ;
作者机构： 1.Heilongjiang Acad Agr Sci, Inst Plant Protect, Harbin 150086, Heilongjiang, Peoples R China
2.Northeast Agr Univ, Coll Agron, Harbin 150030, Heilongjiang, Peoples R China
关键词： Diquat; Photodegradation; Transformation product; UPLC-QTOF-MS
期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.1； 五年影响因子：6.4 ）
ISSN： 0147-6513
年卷期： 2025 年 291 卷
页码：
收录情况： SCI
摘要： In aquatic settings, photodegradation is a significant non-biodegradation method of pesticide degradation. In this investigation, the photodegradation of the herbicide Diquat in aqueous solution was examined under distinct conditions and concentrations. The initial concentration of Diquat and the pH value of the water environment significantly affected the half-life of photodegradation of Diquat, and the opposite was true for different types of water. The photodegradation transformation products (PTPs) formed by the photodegradation of Diquat in an aqueous solution under UV-Vis irradiation were separated and identified using ultra-high-performance liquid chromatography coupled with time-of-fight mass spectrometry (UPLC-QTOF-MS). Based on mass spectral information, four main transition products were identified. Calculations of constituent composition, a comparison of structural analogs, and extant literature all contributed to the structure's determination. The main pathways of photodegradation were found to be oxidation, pyridine ring-opening, cleavage of [C-C] on the piperazine ring, Demethylation reaction and Hydroxylation. These results serve as a foundation for further environmental risk assessment and help explain how Diquat behaves in aquatic environments.
- 相关文献
作者其他论文 更多>>
-
Microbial degradation of Diquat by strain Meyerozyma guilliermondii Wyslmt: Identification of transformation products and clarification of degradation pathways
作者：Wang, Fangyuan;Jia, Jinrong;Gu, Wei
关键词：Diquat;
Meyerozyma guilliermondii Wyslmt; biodegradation; transformation product; UPLC-QTOF-MS -
Integrating transcriptome and metabolomics revealed the key metabolic pathway response of Amaranthus retroflexus L. to the resistance to fomesafen
作者：Song, Weifeng;Wei, Qinghui;Shi, Zhenghao;Pan, Yaqing;Li, Zhiyong;Wang, Fangyuan
关键词：
-
Planting models and deficit irrigation strategies to improve radiation use efficiency, dry matter translocation and winter wheat productivity under semi-arid regions
作者：Han, Yujun;Wang, Yuechao;Gao, Hong;Sun, Ying;Tao, Bo;Ma, Hong;Zhang, Dongmei;Liu, Xiaomin;Zhang, Fengyi;Ren, Honglei
关键词：Deficit irrigation mode; Ridge furrow rainfall harvesting; Radiation use efficiency; Photosynthetically active radiation; Dry matter; Wheat productivity
-
Identification of photoproducts of florasulam in water using UPLC-QTOF-MS
作者：Qiao, Yuxin;Chen, Guofeng;Ma, Chengyi;Tao, Bo;Ma, Hong;Chen, Guofeng;Zhang, Xiaobo;Liu, Feng
关键词：Florasulam; UPLC-QTOF-MS; Photodegradation kinetics; Transformation products; Transformation mechanism
-
Identification and Characterization of Herbicide Penoxsulam Transformation Products in Aqueous Media by UPLC-QTOF-MS
作者：Chen, Guofeng;Qiao, Yuxin;Tao, Bo;Chen, Guofeng;Zhang, Xiaobo;Liu, Feng;Liao, Hui;Zhang, Ruiying;Dong, Jiannan
关键词：Penoxsulam; Photodegradation; Transformation products; UPLC-QTOF-MS
-
Photodegradation of tefuryltrione in water under UV irradiation: Identification of transformation products and elucidation of photodegradation pathway
作者：Chen, Guofeng;Qiao, Yuxin;Tao, Bo;Chen, Guofeng;Liu, Feng
关键词：Tefuryltrione; Photodegradation; Transformation product; UPLC-QTOF-MS
-
Effects of Different Planting Management Methods on Bacterial Community Structure
作者：Song, Xiuli;Guo, Jing;Wu, Yue;Yang, Deguang;Tao, Bo;Song, Xiuli;Wang, Junhe
关键词：Germ; Community diversity; Cropping system; Soil fertility
