来自里斯本供水系统饮用水中的微塑料的形状和尺寸特征的不同方法
Rodrigo D M Cordeiro1, Vitor V Cardoso1, Rui N Carneiro1
1Direção de Laboratórios, Empresa Portuguesa das Águas Livres, S.A.-EPAL, 1250-144 Lisboa, Portugal.
Molecules (Basel, Switzerland)
|September 28, 2024
概括
微塑料存在于饮用水中,聚乙烯是最常见的聚合物. 这项研究量化了里斯本的微塑料.
科学领域:
- 环境科学 环境科学
- 分析水质 分析水质
- 聚合物科学 聚合物科学
背景情况:
- 微塑料 (MP) 对水生生态系统和人类用水量 (WHC) 构成重大威胁.
- 缺乏关于WHC中安全微塑料含量的全球共识,阻碍了监管工作和风险评估.
- 了解饮用水中的MP特性对于公共卫生和环境保护至关重要.
研究的目的:
- 为了描述里斯本供水系统 (LWSS) 中的微塑料颗粒.
- 为了比较两种不同的量化微塑料的方法:粒子尺寸 (长度和宽度) 与面积等值直径 (AED).
- 为确定饮用水中微塑料安全含量提供数据.
主要方法:
- 在传输模式中的微FTIR (里埃变换红外光谱) 用于MP识别.
- 在分析之前,用5微米的过器过水样.
- 两种量化方法进行了比较:粒子长度/宽度和AED.
主要成果:
- 在LWSS的38个WHC样本中检测到微塑料,其度高达836 MPs/L (平均196 MPs/L).
- 聚乙烯 (PE) 是主要的聚合物,占国会议员的77.2%.
- 在比较长度/宽度和AED量化方法时,观察到MP尺寸的显著差异.
结论:
- 里斯本的供水系统中含有微塑料,因此需要进一步调查潜在的健康影响.
- 聚乙烯是这个水源中微塑料污染的主要组成部分.
- 量化方法的选择显著影响了微塑料大小的表征,突出了对标准化方法的需求.
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