评估和比较大西洋航线上的微塑料污染,以已知的不确定性
José Miguel Almeida1, Cecilie Singdahl-Larsen2, Nina Buenaventura2
1Instituto Hidrográfico, Rua das Trinas, 49, 1249-093 Lisboa, Portugal.
Environmental science & technology
|June 29, 2023
概括
在大西洋评估了微塑料 (MP) 污染. 虽然大多数地点显示PM水平较低,但在佛得角,巴西和南非附近发现了更高的度.
科学领域:
- 环境科学 环境科学
- 海洋学 海洋学 海洋学
- 化学 化学 化学
背景情况:
- 微塑料 (MP) 污染是一个全球性问题,但由于物流挑战,公开海洋研究有限.
- 了解MP分布对于评估环境影响和制定减缓策略至关重要.
研究的目的:
- 为了量化大西洋地下水中的微塑料污染.
- 通过严格的不确定性分析报告污染水平.
- 确定常见的微塑料类型及其分布模式.
主要方法:
- 从2020年1月到5月,在NRP Sagres上沿着大西洋的123个航道进行了水样采集.
- 使用船上的系统过地表水,并通过微型FTIR光谱学分析膜.
- 不确定性是使用详细的自下而上的评估来计算的,可信度为99%.
主要成果:
- 在约三分之一的采样站 (48/123) 检测到微塑料.
- 大多数阳性站 (43/48) 的度低于1m-3 km-1.
- 在圣地亚哥 (佛得角),瓜纳巴拉湾 (巴西) 和南非海岸附近观察到更高的度.
结论:
- 这项研究提供了关于大西洋微塑料分布的可靠数据,突出了局部热点.
- 以往研究中的方法差异和不确定性报告限制了直接比较.
- 聚胺,聚,聚乙烯,EVA和PMMA是被确定的主要微塑料类型.
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