西西伯利亚的微塑料正在下雪
Yulia A Frank1, Daria Tatsii2, Alexey R Rednikin1
1Research Centre "Microplastic Siberia", Tomsk State University, Lenina Prospect 36, Tomsk, 634050, Russia.
Environmental pollution (Barking, Essex : 1987)
|November 13, 2024
概括
微塑料 (MP) 和合成纤维污染了西西伯利亚的雪,最常见的是 rayon 纤维. 大气运输,无论是短距离还是远距离,都会输送这些颗粒,突出了一个广泛的环境问题.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 聚合物科学 聚合物科学
背景情况:
- 大气作为一个重要的途径分散人为颗粒,包括微塑料 (MPs) 和合成纤维.
- 积雪分析为监测这些微塑料污染物和人造织纤维的存在和大气传输提供了一种有价值的方法.
研究的目的:
- 调查微塑料 (MP) 和人造织纤维在西西伯利亚广大地区的雪中的丰度和特征.
- 为了确定这些颗粒在雪囊中的沉积速度和质量负载.
- 使用大气建模探索被探测到的粒子的潜在来源和运输路径.
主要方法:
- 在西西伯利亚的积雪中采样和分析微塑料 (MP) 和人造织纤维,从阿尔泰山脉到北极圈.
- 粒子丰度的量化 (项目m-2) 和质量负载 (mg m-2和mg L-1).
- 使用FLEXPART拉格朗的分散模型来模拟潜在的粒子源区域和传输模式.
主要成果:
- 雷昂纤维占检测到的颗粒的44%,其余的56%是微塑料 (MP),包括PET,PA,PC和PP.
- 记录的最高颗粒度为2817±915个物品m−2,每日沉积率为25.8个物品m−2d−1.1.
- 在融化雪中,最大质量颗粒负荷达到4444 ± 1530毫克m−2,或34.9 ± 12毫克L−1. 南部地区的度较高,但与人口密度无关.
- 大气模型表明,颗粒物可以通过短程和远程大气运输运输,具有跨境移动的潜力.
结论:
- 该研究证实西伯利亚的雪被微塑料 (MP) 和合成纤维广泛污染,这些纤维主要来自大气沉积.
- 当地和长途大气运输机制都对颗粒物分布有所贡献,强调了微塑料污染的跨境性质.
- 需要进一步的研究,以充分阐明这些大气污染物的来源和对偏远生态系统的影响.
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