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Potential environmental risks of nanopesticides: Application of Cu(OH)(2) nanopesticides to soil mitigates the degradation of neonicotinoid thiacloprid

文献类型： 外文期刊

作者： Zhang, Xiaoxia 1 ; Xu, Zhenlan 2 ; Wu, Mansha 1 ; Qian, Xiaoting 1 ; Lin, Daohui 3 ; Zhang, Hangjun 4 ; Tang, Juan 4 ; Ze 1 ;

作者机构： 1.Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Zhejiang, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Qual & Stand Agroprod, Hangzhou 310021, Zhejiang, Peoples R China

3.Zhejiang Univ, Dept Environm Sci, Hangzhou 310058, Zhejiang, Peoples R China

4.Hangzhou Normal Univ, Coll Life & Environm Sci, Hangzhou 310036, Zhejiang, Peoples R China

5.Zhejiang Univ Technol, Coll Environm, Hangzhou 310014, Zhejiang, Peoples R China

6.Univ Bremen, Fac Biol Chem 2, UFT Ctr Environm Res & Sustainable Technol, Dept Gen & Theoret Ecol, D-28359 Bremen, Germany

7.Texas A&M Univ, Dept Environm & Occupat Hlth, Sch Publ Hlth, College Stn, TX 77843 USA

关键词： Cu(OH)(2) nanopesticide; Thiacloprid degradation; Adsorption; Microbial communities; Nitrile hydratase activity; Gene abundance

期刊名称：ENVIRONMENT INTERNATIONAL （ 影响因子：9.621； 五年影响因子：10.72 ）

ISSN： 0160-4120

年卷期： 2019 年 129 卷

页码：

收录情况： SCI

摘要： Cu(OH)(2) nanopesticides and organic insecticides are continuously applied to soil at a temporal interval, while knowledge about the impact of Cu(OH)(2) nanopesticides on organic insecticides degradation is currently scarce, resulting in poorly comprehensive evaluation of the potential environmental risks of Cu(OH)(2) nanopesticides. Herein, a commercial Cu(OH)(2) nanopesticide formulation (NPF), the active ingredient of NPF (AI-NPF), the prepared Cu(OH)(2) nanotubes (NT) with comparable morphology and size to AI-NPF, and CuSO4 were respectively applied to soil at normal doses (0.5, 5 and 50 mg/kg), followed by an application of neonicotinoid thiacloprid after an interval of 21 d, showing that NPF at doses of 5 and 50 mg/kg significantly (p < 0.05) mitigated thiacloprid degradation compared to control and CuSO4. Furthermore, AI-NPF was the primary component that contributed to the mitigation effect of NPF, which was also validated by the NT. Large differences in the degradation efficiency of thiacloprid in sterilized and unsterilized soils with Cu(OH)(2) nanopesticides suggested that biodegradation was the primary process responsible for thiacloprid degradation, especially as chemical degradation was negligible. Besides a decrease of thiacloprid bioavailability due to adsorption by Cu(OH)(2) nanopesticides, we demonstrated that Cu(OH)(2) nanopesticides changed soil microbial communities, reduced nitrile hydratase activity and down-regulated thiacloprid-degradative nth gene abundance, which thus mitigated thiacloprid biodegradation. Clearly, this study shed light on the potential environmental risks of Cu(OH)(2) nanopesticide.

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