大气中微塑料的叶子保留:叶子表面特性和降雨强度的影响
Ziqing Zhao1, Yuting Li1, Panpan Gao1
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
|December 27, 2025
概括
植物叶子积累大气中的微塑料 (MPs),其保留受到叶子表面积和排水能力的影响. 降雨的强度和持续时间显著减少了叶子上的MP,这表明某些树木可以监测微塑料污染.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 植物生物学 植物生物学
背景情况:
- 植物叶子充当大气中的微塑料 (MPs) 的沉池.
- 影响微塑料保留在树叶上的因素尚不清楚.
- 城市树木暴露于严重的大气污染.
研究的目的:
- 调查叶面特性和降雨如何影响城市树木上的微塑料保留.
- 确定影响微塑料积累和冲洗的树种特征.
- 评估树木作为大气微塑料污染的生物监测器的潜力.
主要方法:
- 在垃圾填埋场和大学校园附近的城市树木的叶子实地采样.
- 使用聚乙烯二甲 (PET) 微塑料颗粒进行实验室沉积实验.
- 降雨模拟实验,以评估微塑料冲洗率.
主要成果:
- 来自垃圾填埋场的叶子样本显示,与大学校园 (0.03-0.55 件/cm2) 相比,微塑料的保留率更高 (0.09-0.80 件/cm2).
- 季节性积累遵循了这一趋势:秋季>夏季>春季.
- 微塑料的保留与叶子表面积正相关,与水接触角度 (水友性) 负相关.
- 降雨强度和持续时间的增加显著减少了微塑料的保留.
结论:
- 叶面积,水接触角和水友性是控制微塑料保留的关键内在性质.
- 具有更大,更适合水的叶面的树木保留了更多的微塑料,但也表现出更稳定的冲洗率.
- 某些城市树种显示出作为大气微塑料污染评估的有效生物监测器的潜力.
相关概念视频
01:57Adaptations that Reduce Water Loss
27.8K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
27.8K
02:16Light Acquisition
9.3K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
9.3K