Neonicotinoids in draining micro-watersheds dominated by rice-vegetable rotations in tropical China: Multimedia occurrence, influencing factors, transport, and associated ecological risks
文献类型： 外文期刊
作者： Tan, Huadong 1 ; Wang, Chuanmi 1 ; Zhu, Sipu 1 ; Liang, Yuefu 1 ; He, Xiaoyu 1 ; Li, Yi 1 ; Wu, Chunyuan 1 ; Li, Qinfen 1 ; Cui, Yanmei 1 ; Deng, Xiao 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Peoples R China
2.Minist Agr & Rural Affairs, Danzhou Sci Observing & Expt Stn Agroenvironm, Danzhou 571737, Peoples R China
3.Natl Agr Expt Stn Agr Environm, Danzhou 571737, Peoples R China
4.Hainan Engn Res Ctr Nonpoint Source & Heavy Met Po, Danzhou 571737, Peoples R China
5.Hainan Univ, Coll Plant Protect, Haikou 570228, Peoples R China
6.Cent China Agr Univ, Sch Resources & Environm, Wuhan 430070, Peoples R China
关键词： Insecticide; Rice-vegetable rotation; Spatiotemporal distribution; Influencing factors; Multimedia ecological risk
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）
ISSN： 0304-3894
年卷期： 2023 年 446 卷
页码：
收录情况： SCI
摘要： Multimedia contamination by neonicotinoid (NEO) residues has attracted global attention. However, data regarding the multimedia polluted status under certain typical cropping scenarios and the associated risks are scarce. Here, the multimedia occurrence, spatiotemporal distribution, driving factors, transport, and ecological risks of NEOs from tropical rice-vegetable rotation fields were characterized. The heavy NEOs resided in multiple media, and imidacloprid and acetamiprid were the prevailing NEOs, with concentration contributions of 65-80%. The pollution levels of the NEOs, rather than their compositions, exhibited significant spatiotemporal heterogeneity and were highly correlated with the collective (agricultural practices and climate conditions) and differential (e.g., media properties) factors identified using an auto linear regression model. Furthermore, the multimedia transport of NEOs was largely similar but non-negligibly different during the rainy and dry seasons. A new multimedia ecological risk assessment revealed that 50.6% sites were at high risk, and the risk hotspots occurred in the central areas and the winter planting period. The risks were largely contributed by imidacloprid and thiamethoxam, indicating that there were non-ignorable ecological risks. Our results highlight the differ-ential pollution patterns (distribution, transport, and driving factors) of the prevailing NEOs under tropical agricultural scenarios, and the fact that special attention should be paid to the risks posed by NEOs.
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