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Nonenantioselective environmental behavior of a chiral antiviral pesticide dufulin in aerobic soils

文献类型： 外文期刊

作者： Zhang, Weiwei 1 ; Zhou, Xin 1 ; Ye, Qingfu 1 ; Cheng, Xi 1 ; Zhang, Sufen 1 ; Yu, Zhiyang 1 ; Wang, Wei 1 ;

作者机构： 1.Zhejiang Univ, Inst Nucl Agr Sci, Key Lab Nucl Agr Sci, Minist Agr PRC & Zhejiang Prov, Hangzhou 310058, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Agro Prod Safety & Nutr, State Key Lab Managing Biot & Chem Threats Qual &, Key Lab Pesticide Residue Detect,Minist Agr & Rura, Hangzhou 310021, Peoples R China

3.Zhejiang Univ, Inst Nucl Agr Sci, Hangzhou 310058, Peoples R China

关键词： Dufulin; Nonenantioselective dissipation; Soil microbiota; Four-compartment model

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2023 年 880 卷

页码：

收录情况： SCI

摘要： Dufulin is a promising chiral antiviral agent, but little is known about its fate in soils. In this study, the fate of dufulin enantiomers in aerobic soils was investigated using radioisotope tracing techniques. The result of the four-compartment model showed no significant differences in dissipation, generation of bound residues (BR) and mineralization between S-dufulin and R-dufulin during incubation. Dufulin dissipated most quickly in cinnamon soils, followed by fluvo-aquic and black soils and the half-lives of dufulin in these soils obtained by the modified model were 4.92-5.23, 32.39-33.32 and 60.80-61.34 d, respectively. After 120 d incubation, the percentage of radioactivity of BR increased to 18.2-38.4 % in the three soils. Dufulin formed most bound residues in the black soil, least in the cinnamon soil, and BRs rapidly formed in the cinnamon soil during the early culture period. In these three soils, the cumulative mineralization of (CO2)-C-14 ranged from 25.0 to 26.7 %, 42.1 to 43.4 % and 33.8 to 34.4 %, respectively, which indicated that the environmental fate of dufulin was primarily influenced by soil characteristics. The study of microbial community structure revealed that the phyla Ascomycota, Proteobacteria and genus Mortierella might be related to the degradation of dufulin. These findings provide a reference for assessing the environmental impact and ecological safety of dufulin application.

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