聚乙烯纳米塑料改变了狄克洛芬雅克对淡水微藻的生态毒理作用Scenedesmus obliquus
Abisha Christy Christudoss1, Natarajan Chandrasekaran1, Amitava Mukherjee1
1Centre for Nanobiotechnology, Vellore Institute of Technology, Vellore, Tamil Nadu, India. amit.mookerjea@gmail.com.
Environmental science. Processes & impacts
|November 16, 2023
概括
来自纳米塑料和药品 (如二二) 的塑料污染会损害水生生物. 它们对微藻的联合作用显示出协同和对抗性毒性,取决于度,影响淡水生态系统.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 水生化学 水生化学
背景情况:
- 升级的塑料污染包括纳米塑料,对水生环境构成风险.
- 纳米塑料可以与其他污染物相互作用,例如药品,影响生态系统.
- 了解混合污染物影响对于环境风险评估至关重要.
研究的目的:
- 调查光聚烯纳米塑料 (FNPs) 和双 (DCF) 对微藻 *Scenedesmus obliquus* 的单独和联合毒性.
- 阐明观察到的毒性背后的机制,包括氧化应激和藻类生理学的变化.
- 分析污染物相互作用对纳米塑料体稳定性和吸附行为的影响.
主要方法:
- 完整的因数设计,以评估FNP和DCF对*S. obliquus*的联合作用.
- 通过剂量依赖性暴露,氧化应激参数测量,抗氧化酶活性和光合作用色素含量来评估毒性.
- 分析纳米塑料的水力动力直径和表面电荷,以了解体稳定性和吸附性.
主要成果:
- 原始的FNP和DCF都对*S. obliquus*表现出剂量依赖的毒性,主要是通过氧化应激.
- 联合暴露在高DCF度 (1毫克L-1) 时显示出协同毒性,在较低DCF度 (0.25毫克L-1) 时显示出对抗作用.
- 污染物相互作用改变了FNP聚合和DCF吸附,影响了细胞-颗粒相互作用,并显示了hormesis效应.
结论:
- 纳米塑料和药品对淡水中的微藻具有显著的共同暴露风险.
- 联合毒性依赖于度,表现出协同作用和对抗作用.
- 了解污染物相互作用及其对体性质的影响,是预测生态毒理学结果的关键.
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