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评估长江流域水生环境中的类毒素积累和生态风险,中国

Gedion Tsegay¹, George Lartey-Young², Mehari Mariye²

¹UNEP-TONGJI Institute of Environment for Sustainable Development (IESD), College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China; Jiaxing-Tongji Environmental Research Institute, 1994 Linggongtang Road, Jiaxing, 314051, Zhejiang Province, China.

|January 25, 2024

概括

在长江流域,类农药 (NNI) 的含量各不相同,对婴儿和水生生物构成风险. 进一步的研究对于了解和减轻这些生态威胁至关重要.

科学领域:

环境化学环境化学
生态毒理学生态毒理学
公共卫生公共卫生

背景情况:

尼奥尼科丁类药物 (NNIs) 是广泛使用的农药,对长期生态系统影响的数据有限.
关于NNI门水平及其在特定地区的生态影响,存在知识差距.

研究的目的:

评估NNI度及其在长江流域 (YRB) 对人类健康和水生生物的潜在影响.
评估人类暴露的风险和估计对水生生物的危险度.

主要方法:

在YRB的12个地点的244个地表水样本中分析了7个常见的NNI.
用于人类风险评估的相对强度因子.
使用物种灵敏度分布来确定水生生物的急性和慢性HC5.

主要成果:

NNI度有显著的变化, thiacloprid 在0.1 ng/L 和dinotefuran 在408 ng/L.
在YRB下游,NNI水平下降.
婴儿的暴露风险最高 (40.8 ng/kg bw d−1).
急性HC5为946 ng/L;慢性HC5为338 ng/L.

结论:

在YRB中显著的NNI存在需要对生态影响有更深入的理解.
对人类健康 (特别是婴儿) 和水生生物的确定的风险.
迫切需要缓解策略和进一步研究该地区的NNI危险.

关键词:

水生物种水生物种水生物种这是一种新型尼奥尼科丁类药物.风险评估风险评估风险评估空间分布的空间分布一种物种的敏感度分布.

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