文献类型：期刊文献

英文题名：Degradation of Isotianil in Water and Soil: Kinetics, Degradation Pathways, Mechanisms, and Ecotoxicity Assessments

作者：Ai, Lina Guo, Junjiang Chen, Hong Hu, Deyu Lu, Ping

第一作者：Ai, Lina

通信作者：Lu, P[1]

机构：[1]Guizhou Univ, Ctr R&D Fine Chem, State Key Lab Green Pesticide, Key Lab Green Pesticide & Agr Bioengn,Minist Educ, Guiyang 550025, Peoples R China;[2]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China

第一机构：Guizhou Univ, Ctr R&D Fine Chem, State Key Lab Green Pesticide, Key Lab Green Pesticide & Agr Bioengn,Minist Educ, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Ctr R&D Fine Chem, State Key Lab Green Pesticide, Key Lab Green Pesticide & Agr Bioengn,Minist Educ, Guiyang 550025, Peoples R China.

年份：2024

卷号：72

期号：30

起止页码：16614-16623

外文期刊名：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

收录：;EI(收录号：20243016741895);Scopus(收录号：2-s2.0-85199075312);WOS:【SCI-EXPANDED(收录号:WOS:001273633800001)】；

基金：This work wassupported by the National Natural Science Foundation of China (No.32260692), the Natural Science Foundation of Guizhou Province (No.ZK [2022] ZD-013), and the Program of Introducing Talents to Chinese Universities [No. 111 Program, D20023].

语种：英文

外文关键词：isotianil; degradation pathway; mechanisms; ecotoxicity assessment

摘要：Pesticides are transported and transformed in soil and can enter surface water through various pathways. They undergo hydrolysis, oxidation, and photoconversion in surface water. Isotianil is a new fungicide that effectively controls rice blast. However, there are limited reports on its degradation. Herein, the hydrolysis and photolysis of isotianil in water and its degradation in soil samples from five provinces of China were investigated. The degradation products of isotianil were identified using ultrahigh-performance liquid chromatography-Q exactive hybrid quadrupole-orbitrap high-resolution accurate mass spectrometry, and four compounds were discovered for the first time. The degradation pathways of isotianil were inferred, and the reaction active site and degradation mechanism of isotianil were clarified based on density functional theory calculations. The ecotoxicity of the degradation product M118 (aminobenzonitrile) was found to be moderate toward Daphnia magna, which was predicted and confirmed by Ecological Structure Activity Relationships and the experiment, respectively. The results of this study will contribute to a better understanding of the fate of isotianil in the environment.