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使用LA-ICP-TOFMS研究原始塑料和经历海洋变化的塑料中的金属分布模式

Lyndsey Hendriks¹, Matthias Egger^2,3, Denise M Mitrano⁴

¹Institute of Analytical Chemistry, University of Vienna Währingerstraße 38 1090 Vienna Austria lyndsey.hendriks@univie.ac.at.

Journal of analytical atomic spectrometry

|September 10, 2025

概括

海洋中较大的塑料碎片可以重新分配危险金属. 经过气候变化的塑料显示出元素变化,表面枯竭和海水的丰富,突出了海洋污染研究的新分析方法.

科学领域:

环境科学环境科学
海洋污染海洋污染
材料科学材料科学材料科学

背景情况:

海洋环境中的塑料污染由于释放危险物质,包括金属添加剂,造成了生态风险.
虽然微塑料被认为是污染媒介,但较大的巨型塑料在物质再分配中的作用不太清楚.
研究海洋塑料中的金属分布对于了解污染物运输和气候变化过程至关重要.

研究的目的:

分析原始和经过气候变化的海洋巨型塑料中的元素组成和分布.
研究巨型塑料在海洋环境中金属的空间和时间再分配中的作用.
为了证明先进的分析技术用于绘制塑料元素分布的实用性.

主要方法:

富里埃转换红外光谱 (FTIR) 用于聚合物识别.
感应合等离子体质谱 (ICP-MS) 用于散装金属的量化.
激光切除感应合等离子体飞行时间质谱 (LA-ICP-TOFMS) 用于高分辨率元素映射.

主要成果:

详细的元素地图揭示了原始塑料中的原生金属分布.
经过气候变化的塑料表现出表面内在金属的枯竭和海水衍生元素的丰富 (例如Na,Mg,I).
塑料截面的空间分布趋势显示方向梯度,表明重新分配.

结论:

LA-ICP-TOFMS是绘制塑料元素分布的强大工具,为海洋污染提供了新的见解.
气候变化改变了巨型塑料的元素组成,影响了它们在污染物再分配中的作用.
这项研究为未来研究塑料气候变化及其对海洋生态系统的影响提供了基础.

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