在北大西洋的纳米塑料度
Sophie Ten Hietbrink1,2, Dušan Materić3,4, Rupert Holzinger1
1Institute for Marine and Atmospheric Research Utrecht (IMAU), Utrecht University, Utrecht, The Netherlands.
Nature
|July 9, 2025
概括
海洋纳米塑料是一个重要的,未经定量化的塑料污染威胁. 这项研究量化了北大西洋中的纳米塑料,
科学领域:
- 环境科学
- 海洋学
- 化学海洋学
背景情况:
- 海洋塑料污染是一个全球性问题,研究重点是宏观和微观塑料.
- 海洋纳米塑料 (<1μm) 在很大程度上未得到量化,因此在理解塑料质量预算方面存在差距.
- 现有研究还没有完全解决纳米塑料在海洋环境中的规模和影响.
研究的目的:
- 在北大西洋水柱中量化纳米塑料度.
- 评估纳米塑料对海洋塑料总量预算的贡献.
- 研究纳米塑料从亚热带旋转到货架区域的分布模式.
主要方法:
- 在北大西洋的海洋盆地尺度截面采样.
- 在水柱中测量纳米塑料度 (聚乙烯二甲,聚烯,聚乙烯).
- 在混合层,中间层和底层水中比较纳米塑料度.
主要成果:
- 在整个北大西洋水柱中,纳米塑料度在1.5-32.0毫克/m3之间.
- 混合层纳米塑料比中间深度高1.4倍,高峰在欧洲附近.
- 亚热带环流中介水域的纳米塑料度高出北大西洋的1.8倍.
- 底部水的度最低 (约为5.5毫克),主要是聚乙烯甲酸盐.
- 北大西洋中温带至亚热带地区的混合层纳米塑料量估计达到2700万.
结论:
- 纳米塑料在海洋塑料污染中占有很大,可能占主导地位.
- 纳米塑料的估计质量与海洋中宏观/微观塑料的估计相美或超过.
- 进一步的研究对于了解纳米塑料在海洋生态系统中的全部影响和命运至关重要.
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