Xenon-lamp simulated sunlight-induced photolysis of pyriclobenzuron in water: Kinetics, degradation pathways, and identification of photolysis products
文献类型： 外文期刊
作者： Wu, Huanqi 1 ; Yang, Kongtan 2 ; Wang, Xumi 1 ; Fang, Nan 2 ; Weng, Peifang 1 ; Duan, Liping 4 ; Zhang, Changpeng 2 ; Wang, Xiangyun 2 ; Liu, Lianliang 1 ;
作者机构： 1.Ningbo Univ, Coll Food & Pharmaceut Sci, Ningbo 315211, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Agroprod Safety & Nutr, Key Lab Pesticide Residue Detect, Minist Agr & Rural Affairs,State Key Lab Managing, Hangzhou 310021, Peoples R China
3.Jilin Agr Univ, Coll Plant Protect, Changchun 130118, Peoples R China
4.Chinese Ctr Dis Control & Prevent, Natl Inst Parasit Dis, WHO Collaborating Ctr Trop Dis, NHC Key Lab Parasite & Vector Biol, Shanghai 200025, Peoples R China
关键词： Photolysis products; Xenon lamp; Aqueous environment; Molluscicide; UPLC-Q; TOF MS; ECOSAR
期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.8； 五年影响因子：6.9 ）
ISSN： 0147-6513
年卷期： 2023 年 263 卷
页码：
收录情况： SCI
摘要： Pyriclobenzuron 1(PBU) is a novel molluscicide developed to control Pomacea canaliculate, and little information on its environmental fate has been published. In this study, the photolysis of PBU in an aqueous environment was simulated using a xenon lamp. Results showed that the photolysis of PBU in water followed first-order kinetics, exhibiting a t0.5 of 95.1 h and 83.6 h in Milli-Q water and river water, respectively. Two main photolysis products 2(PPs) were detected by HPLC-UV and identified by UPLC-Q/TOF MS, which were formed via the hydroxylation and photocatalytic hydro-dehalogenation of PBU, respectively. The initial relative abundance of photolysis product 1 3(PP-1) in Milli-Q water was 1.55 times higher than that in river water. PP-1 was detected at 26.5 % and 76.8 % of the maximum relative abundance in the river water and Milli-Q water after 720 h, respectively. Photolysis product 2 4(PP-2) was stable in water because of its weak hydrophilicity. The PP-2 detected after 720 h in Milli-Q water and river water was 93.7 % and 93.5 % of the maximum relative abundance, respectively. Finally, ECOSAR software was used to evaluate the acute aquatic toxicity of PBU and its PPs, revealing that the PPs had lower toxicity levels to non-target aquatic organisms.
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