改进的分离和定量方法用于沉积物中的微塑料分析:来自北极格陵兰的细粒度矩阵
K B Parga Martínez1, V H da Silva2, T J Andersen3
1Section of Geology - Department of Geosciences and Natural Resource Management (IGN), University of Copenhagen, Øster Voldgade 10, 1350 Copenhagen, Denmark.
Marine pollution bulletin
|September 29, 2023
概括
这项研究提出了一种从沉积物中提取微塑料的新方法,减少处理时间和颗粒损失,特别是对于较小的微塑料. 改进的技术提高了环境样本中的微塑料回收.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 微塑料分析对于了解环境污染至关重要.
- 目前从沉积物中提取微塑料通常涉及漫长的步骤,导致颗粒损失,特别是小于100微米的微塑料.
- 需要有效的分离方法来准确量化微塑料在不同的矩阵.
研究的目的:
- 开发和验证一种改进的方法,用于从细粒度沉积物中分离和定量微塑料.
- 在提取过程中最大限度地减少微塑料的损失,专注于更小的颗粒大小.
- 提高环境样本中微塑料分析的效率和准确性.
主要方法:
- 一个连续的提取过程,涉及酸 (CH3COOH),氧化 (KOH) 和化 (NaClO) 处理.
- 密度分离使用化 (ZnCl2) 溶液作为主要分离步骤,最大限度地减少中间转移.
- 视觉评估和微型里叶变换红外光谱 (μFTIR) 用于评估提取效率和回收率.
主要成果:
- 提取效率超过90%的微塑料颗粒>100微米和83%的颗粒在63-75微米之间.
- 顺序提取方法显著降低了较小的微塑料部分颗粒损失的风险.
- 虽然烯二丁 (ABS) 颗粒 (20-100μm) 的提取率较低 (30%),但通过μFTIR评估的回收率更高 (55%).
结论:
- 拟议的方法为细粒度沉积物中的微塑料分离和量化提供了一种高效的方法.
- 减少提取过程中的中间步骤是最大限度地减少微塑料损失的关键,特别是对于小于100微米的颗粒.
- 该方法可以适应各种沉积物类型和环境矩阵,在微塑料研究中具有更广泛的适用性.
相关概念视频
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