首次尝试测量河流中的巨型塑料碎片化
Maciej Liro1, Anna Zielonka1, Paweł Mikuś1
1Institute of Nature Conservation, Polish Academy of Sciences, al. Adama Mickiewicza 33, Kraków 31-120, Poland.
Environment international
|August 22, 2024
概括
一种新的低成本方法量化了河流中的巨型塑料碎片化. 被标记的塑料瓶出现了显著的质量损失,这表明即使在流量较低的山区河流中,微塑料也迅速形成.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 河流生态 河流生态
背景情况:
- 河流中的巨型塑料碎片化是微塑料的关键来源.
- 缺乏对这一过程的直接现场测量.
- 河流碎片化的热点对生态系统和人类健康构成风险.
研究的目的:
- 开发和验证一种简单,低成本的现场方法,用于量化河流中的巨型塑料碎片化.
- 为了评估聚乙烯二甲 (PET) 瓶在山河环境中的碎片化率.
主要方法:
- 一种新的现场方法,涉及在河流运输过程中重复测量标记的巨型塑料物品的质量.
- 在波兰斯卡瓦河 (Skawa River) 用1升PET瓶进行了超过52-65天的概念验证实验.
- 将碎片化速率推断为每年质量损失和表面退化.
主要成果:
- 在实验期间,PET瓶的中位碎片化率为0.044±0.012g.
- 在低到中流量下,估计年均中位数质量损失为0.26 ± 0.012 g/年 (0.78%的瓶子质量).
- 估计平均表面降解率为3.13 ± 0.14μm/年.
结论:
- 拟议的方法对于量化河流巨型塑料碎片化的有效.
- 在山地河流中,即使流量低到中等,PET瓶子也相对迅速地碎裂.
- 该方法可以适应各种河流类型,帮助微塑料减排策略.
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