沉积增强了Chlorella vulgaris对微塑料的耐受性
Yuanyuan Wei1, Xuan Hou1, Xiangang Hu1
1Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
Journal of hazardous materials
|September 6, 2025
概括
暴露在光线下形成微塑料-复合体,改变
科学领域:
- 环境科学
- 材料科学
- 生物化学
背景情况:
- 微塑料 (MP) 和重金属 (HM) 是重要的环境污染物.
- MPs与 (Cr) 之间的相互作用以及环境转化对毒性的影响尚不清楚.
研究的目的:
- 研究光辐射对MP-Cr相互作用的影响.
- 评估MP-Cr复合物对Chlorella vulgaris (C. vulgaris) 的毒性
主要方法:
- 传输电子显微镜 (TEM)
- 福里埃变换红外光谱 (FTIR)
- 射线光电子光谱 (XPS)
- 生物测定 (MMP,Fv/Fm,超结构)
- 代谢和基因表达分析
主要成果:
- 光照射促进了MP-Cr-MP复合物的形成,并导致了Cr的沉积.
- 在复合物中氧化到有毒六价状态的15.516.0%.
- 与单独使用的MP或Cr相比,MP-Cr-MP复合物对C. vulgaris的毒性有所缓解.
- 与固体阻碍相关的毒性降低和细胞外聚合物质增加.
- 通过改变的代谢物和与内细胞形成相关的基因表达体现出减轻的毒性.
结论:
- 环境转化,特别是光照,导致MP-Cr复合体的形成.
- MP-Cr-MP复合物可以降低MP和Cr的明显毒性.
- 忽视这些复合物可能会导致过度估计MP和Cr的毒性.
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