微塑料颗粒的化学表征,形成于排放下下水道管道修复的空气废物中
Brianna N Peterson1, Ana C Morales1, Jay M Tomlin1
1Department of Chemistry, Purdue University, West Lafayette, IN, USA. alaskin@purdue.edu.
Environmental science. Processes & impacts
|October 2, 2023
概括
污水管道修复会释放空气中的微塑料. 较大的颗粒与修复材料相匹配,而较小的颗粒则由无意的聚合物形成,受树脂类型的影响.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 微塑料污染是一个日益严重的环境问题,来自塑料的降解和废物.
- 污水管道修复过程已被确定为城市环境中空气中的微塑料的来源.
研究的目的:
- 从下水道管道维修废弃物中化学表征微塑料颗粒.
- 为了比较颗粒成分与未固化树脂和固化塑料复合材料.
- 为了研究树脂类型对微塑料成分的影响.
主要方法:
- 使用表面增强拉曼光谱法 (SERS) 进行多模态化学表征.
- 扫描传输X射线光谱显微镜 (STXM).
- 单颗粒子质谱法 (SPMS). 单颗粒子质谱法.
- 在实时高分辨率质谱学 (DART-HRMS) 中进行直接分析.
主要成果:
- 微塑料颗粒 (大约2个小时) 100μm) 类似于用于管道维修的塑料材料的组成.
- 较小的微塑料颗粒 (微米和亚微米) 呈现出不同的组成,这表明它们是由水溶性成分的意外聚合形成的.
- 在修复过程中使用的树脂类型会影响释放的微塑料的组成.
结论:
- 污水管道修复会产生空气中的微塑料,其成分根据颗粒大小而有所不同.
- 了解这些形成途径对于开发有效的检测和缓解策略至关重要.
- 这项研究为未来对基础设施维修技术中空气中微塑料的研究提供了洞察力.
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