活化污泥堆肥过程引起的微塑料和之间的改变相互作用和关节毒性
Changyu Ma1, Xinyuan Hu1, Zihui Zhao1
1Center of Free Electron Laser & High Magnetic field, Anhui University, Hefei 230601, PR China.
Journal of hazardous materials
|January 28, 2026
概括
堆肥污泥转化了微塑料 (MP),增加了它们吸附的能力. 这种老化过程增强了MPs和对Caenorhabditis elegans的联合毒性,造成环境风险.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 毒理学 毒理学 毒理学
背景情况:
- 污泥堆肥是农业土壤中微塑料 (MP) 污染的主要来源.
- 人们对MPs的环境修饰 (老化) 以及它们与污染物的结合效应的了解很少.
研究的目的:
- 研究泥堆肥中聚乙烯二甲 (PET),聚烯 (PP) 和聚乙烯 (PE) 的衰老.
- 确定MP老化对 (Zn) 吸附和生物可用性的影响.
- 在模型生物Caenorhabditis elegans (C. elegans) 上评估老年MP (A-MPs) 和Zn的关节毒性.
主要方法:
- 在污泥中对PET,PP和PEMP进行堆肥处理.
- 使用显微镜和功能组分析对老年MPs (A-MPs) 的表面表征.
- 测量 Zn 吸附到 A-MPs 的测量.
- 在PET老化过程中释放的溶解有机物 (DOM) 分数及其与Zn的相互作用的分析.
- 对A-MPs和Zn对C. elegans的生殖毒性的评估.
主要成果:
- MP老化造成了表面裂和沟,增加了含氧的功能组.
- A-MPs表现出增强的Zn2+吸附,特别是老化的PET (A-PET).
- 从老化PET中溶解的有机物质优先复合与类似蛋白质的成分,结合Zn2+.
- 随着MP的衰老,PET和Zn2+对C. elegans的关节生殖毒性显著增加.
- 在线虫肠道中加速的Zn2+溶解和增强的生物积累被确定为潜在的机制.
结论:
- 在堆肥中氧化老化重塑MP表面,增强重金属吸附和生物可用性.
- 老年国会议员和等同时存在的污染物会增加环境风险.
- 这些发现为评估农业土壤中MP污染物复合物的生态危害提供了科学基础.
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