一个新的测试设施对处女 (微) 塑料的碎片化研究的影响
Maximilian P Born1, Catrina Brüll1, Holger Schüttrumpf1
1Institute of Hydraulic Engineering and Water Resources Management, RWTH-Aachen University, Mies-van-der-Rohe-Straße 17, 52074 Aachen, Germany.
Environmental science & technology
|July 7, 2023
概括
波动和沉积物磨损等机械力足以将塑料碎成微塑料. 这项研究强调了沉积物是近岸塑料碎片化的关键驱动因素,独立于紫外线辐射.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 海洋学 海洋学 海洋学
背景情况:
- 水生环境中的塑料垃圾碎片化为微塑料,增加化学载体和浸的表面积.
- 之前的研究往往忽视了机械力,主要关注塑料碎片化的紫外线降解.
研究的目的:
- 研究机械碎片驱动因素 (波浪冲击和沉积物磨损) 对塑料颗粒的影响.
- 评估扩展聚钢 (EPS),高密度聚乙烯 (PE-HD) 和聚乙烯四甲酸盐 (PET) 的碎片化.
主要方法:
- 利用一个新的测试设施,Slosh-Box,同时模拟波浪冲击和沉积物磨损.
- 使用扫描电子显微镜量化了表面积的增加.
主要成果:
- 仅仅机械冲击就足以造成显著的塑料碎片化.
- EPS的表面积增加了2370倍以上,而PE-HD和PET的表面积增加了1到8.6倍.
- 沉积物磨损被确定为近岸环境中的相关碎片化驱动因素.
结论:
- Slosh-Box 设施非常适合用于研究塑料碎片化.
- 机械力量,特别是沉积物磨损,在近岸微塑料形成中发挥着至关重要的作用.
- 未来的研究应该在塑料碎片化研究中纳入机械驱动因素.
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