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在米多媒体系统中模拟 thiacloprid 的时空空间动态和模拟,以湿干循环的效果

Haomiao Cheng¹, Hanyang Xu¹, Min Guo²

¹School of Environmental Science and Engineering, School of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, 225127, China.

Environmental pollution (Barking, Essex : 1987)

|December 20, 2023

概括

湿干循环灌可显著降低土壤和水中的 thiacloprid (THI),加速其降解并最大限度地降低田的漏风险. 这种水资源管理策略降低了环境对这种新烟类农药的暴露.

科学领域:

环境化学环境化学
农业科学农业科学
生态毒理学生态毒理学

背景情况:

烯 (THI) 是一种新型类杀虫剂,被广泛使用,但由于其持久性和毒性而带来风险.
了解THI在田中的命运对于减轻环境污染至关重要.
目前关于不同灌实践下的THI动态的知识有限.

研究的目的:

研究水资源管理实践对米多媒体系统中THI的时空分布的影响.
评估湿干循环 (WDC) 灌在减少THI发生和加速其降解方面的有效性.
确定影响THI在米种植中的环境命运的关键因素.

主要方法:

结合了土壤柱实验和非平稳状态的多媒体模型来模拟TI的命运.
将传统的洪水 (CF) 与严重的湿干循环 (SW) 灌处理方法进行比较.
分析了土壤,间歇水和覆盖水中的THI度,以及降解率和流出.

主要成果:

WDC灌显著降低了THI在土壤和水阶段的含量 (从18.8%降至9.2%),并缩短了其半衰期 (从11.1日降至7.3天).
WDC灌减少了THI出,降低了地下水污染的风险.
THI降解是主要的消散途径 (57.7%),其次是通过泄漏 (25.5%) 的外流.
顶层土壤层 (0-4厘米) 作为THI的主要沉积点.

结论:

湿干循环灌是一种有效的水资源管理策略,可以减少 thiacloprid 在田中的环境持久性和生态风险.
优化灌实践可以增强THI降解,并最大限度地减少其场外运输.
土壤有机碳分割系数 (KOC) 是影响THI命运的关键参数.

关键词:

消耗是一种消耗.逃跑的方法是不确定的.尼奥尼科丁类药物是什么?巴迪多媒体系统 Paddy多媒体系统土壤柱的土壤柱.土壤干燥和重新灌.

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