光老化聚乙烯微塑料对小麦苗木根的毒性
Huiqian Wang1, Yuan He2, Qiuping Zheng2
1College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, People's Republic of China; Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States.
Journal of hazardous materials
|November 4, 2024
概括
光衰老的聚乙烯微塑料 (PVC-MPs) 和它们的成分会损害小麦根,液中的添加剂显著增加了毒性. 这凸显了PVC-MP添加剂带来的环境风险.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 植物科学 植物科学
背景情况:
- 聚乙烯微塑料 (PVC-MPs) 在陆地环境中很常见,但它们对植物的影响尚不清楚.
- 光衰老增强了PVC-MP及其组件的生态毒性.
- 小麦苗根是评估陆地植物对微塑料污染反应的敏感指标.
研究的目的:
- 为了研究在小麦苗木根上的光老化PVC-MP组件的物理化学毒性机制.
- 为了区分液 (L),液颗粒 (P) 和未液PVC-MPs (UAMP) 的作用.
- 确定PVC-MP衍生添加剂在生态毒性的作用.
主要方法:
- 小麦苗被暴露在108小时的光衰和未衰老的PVC-MP组件 (L,P,UAMP) 中.
- 分析了根的生长,结构,营养含量和根活动.
- 研究了抗氧化剂系统和表面吸附.
- 主要组件分析 (PCA) 用于评估附加性贡献.
主要成果:
- 经过108小时的光衰成份表现出比未经老化的成份更大的毒性,根长度减少了3.56%-7.45%.
- 老年UAMP表现出更显著的根结构抑制,营养含量和活性,与老年L和P相比,抗氧化剂刺激更大.
- 观察到物理损害 (P) 和化学损害 (L) 之间的协同效应.
- 照相老化PVC-MP衍生添加剂,如Irgafos 168-ox和Irganox 1076,存在环境风险.
结论:
- 照片老化PVC-MP,特别是它们的添加剂,对陆地植物构成重大环境风险.
- 液中的添加剂在PVC-MPs的生态毒性中起着至关重要的作用.
- 对PVC-MPs对环境的影响评估必须考虑衍生添加剂的贡献.
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