无机添加剂诱导更多小型微塑料从医疗面罩中释放出来
Licheng Wang1,2,3, Lifang Xie1,2,3, Yumo Li4
1Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, Peoples' Republic of China.
Environmental science & technology
|April 29, 2025
概括
医疗面罩 (MFMs) 中的无机添加剂加速了塑料的老化,并增加了微塑料的释放. 碳酸盐基因被确定为主要原因,突出显著的环境危害.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
背景情况:
- 医学面罩 (MFMs) 中微塑料的释放是一个已知的问题.
- 无机添加剂,如碳酸 (CaCO3) 在微塑料排放中的特定作用以前没有被确定.
研究的目的:
- 为了比较分析从含有CaCO3添加剂和不含有CaCO3添加剂的MFMs释放的微塑料.
- 阐明无机添加剂对面具材料的光衰老和降解的影响.
主要方法:
- 用表面增强的拉曼光谱法 (SERS) 来检测微型和纳米塑料的释放.
- 模拟拉曼散射 (SRS) 用于增材混合的立体特征和内部塑料老化的3D成像.
- 进行了激进火实验,以确定负责加速衰老的化学物种.
主要成果:
- 发现无机添加剂,特别是CaCO3,可以显著加速MFMs中的塑料材料的光衰老.
- 这种加快的老化导致更小尺寸的微塑料的排放增加.
- 碳酸盐基因被确定为驱动这种现象的主要机制.
结论:
- 在MFMs中的无机添加剂在增强微塑料污染方面发挥着关键作用.
- 这项研究揭示了以前未知的普通口罩添加剂的危险潜力.
- 这些发现强调了在设计和处置聚合物制品时需要考虑添加剂的影响.
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