微塑料纤维和迪布甲对藻类的联合毒性:协同作用还是对抗作用?
Le Liang1, Yangyang Liang2, Min Su1
1School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China.
Aquatic toxicology (Amsterdam, Netherlands)
|February 21, 2025
概括
微塑料纤维 (MPF) 和双甲 (DBP) 伤害淡水藻类. 它们的联合毒性依赖于度,在高MPF水平时表现出协同效应,在低水平时表现出对抗效应.
科学领域:
- 环境毒理学环境毒理学
- 生态毒理学 生态毒理学
- 水生生态学 水生生态学
背景情况:
- 微塑料纤维 (MPF) 和双甲 (DBP) 是淡水生态系统中普遍存在的污染物.
- 对于MPF和DBP的联合毒性尚不清楚,需要进一步调查.
研究的目的:
- 评估MPF和DBP对淡水藻类Chlorella vulgaris的单独和联合毒性.
- 研究对藻类生长,光合作用,新陈代谢和氧化应激的影响.
- 用综合生物标志物响应 (IBRv2) 和效应添加指数 (EAI) 评估毒性相互作用.
主要方法:
- 暴露Chlorella vulgaris在不同度的聚烯MPF和DBP中,单独或组合.
- 测量生长抑制,光合作用色素含量 (叶绿素,胡卜素),蛋白质含量和氧化酶活性 (SOD,CAT,MDA).
- 使用IBRv2和EAI量化有毒相互作用以确定协同作用或对抗作用.
主要成果:
- 两种MPF和DBP都对C. vulgaris表现出显著的毒性影响.
- 联合暴露,特别是高度的MPF,导致增长抑制增加,颜料和蛋白质含量发生变化,氧化应激标志物增加.
- 较高的IBRv2值表明,与单独暴露相比,联合暴露的伤害更严重.
- 在高度的MPF中观察到协同毒性,而在低度的MPF中观察到对抗毒性.
结论:
- MPF和DBP对淡水藻类产生显著的毒性,具有复杂的相互作用.
- 结合的毒性依赖于度,根据MPF水平表现出协同作用和对抗作用.
- 这项研究强调了考虑微塑料和塑化剂在淡水生态系统中的度依赖相互作用的关键需要.
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