小微塑料的质量度远高于大型微塑料,在欧洲九条主要河流的表面
Louisa Landebrit1, Rémi Sanchez1, Lata Soccalingame2
1Laboratoire Softmat, Université de Toulouse, CNRS UMR 5623, Université Toulouse III - Paul Sabatier, Toulouse, France.
Environmental science and pollution research international
|August 1, 2024
概括
在欧洲河流中量化了大型和小型的微塑料. 小微塑料比大塑料更为丰富,度低于亚洲或美国,影响了河流塑料分布模式.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 海洋生物学 海洋生物学
背景情况:
- 微塑料污染对水生生态系统构成重大威胁.
- 了解微塑料的特性 (大小,聚合物类型,度,分布) 对于评估它们的环境命运和影响至关重要.
- 之前的研究集中在不同地区,需要标准化抽样和分析进行比较评估.
研究的目的:
- 在九条欧洲主要河流中量化和描述大型微塑料 (LMP) 和小型微塑料 (SMP).
- 将欧洲河流中的微塑料度与全球其他地区的度进行比较.
- 研究城市地区与河流中的微塑料度之间的关系.
主要方法:
- 在塔拉微塑料探险期间,在九条欧洲河流中采用了标准化采样协议.
- 用减弱的总反射率-里埃变换红外光谱法 (ATR-FTIR) 来识别聚合物.
- 热解加上气体染色学和质谱学 (Py-GC-MS) 确定了微塑料的质量和数量含量.
主要成果:
- 中位数LMP度为6.7颗粒子/立方米,低于美洲和亚洲地区报告的水平.
- SMP质量度明显高于LMP度,SMP/LMP比率高达1000%.
- 在任何一个大小类别中都没有观察到城市地区和微塑料度之间的系统正相关性,这可能是由于异质的运输.
结论:
- 与全球其他地区相比,欧洲河流的LMP度较低.
- 从质量来看,SMP在微塑料污染中占主导地位,这凸显了它们更大的环境相关性.
- 河流运输的异质性复杂化了城市来源和微塑料度之间的直接相关性,影响了预测建模的努力.
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