由于COVID封锁,大气中的微塑料散装量沉积率受到重大影响
Max Beaurepaire1, Johnny Gasperi2, Bruno Tassin1
1LEESU, Ecole des Ponts, Universite Paris Est Creteil, Champs sur Marne, France.
Environmental pollution (Barking, Essex : 1987)
|January 18, 2024
概括
在法国的封锁期间,由于人类活动减少,大气中的微塑料沉积量显著减少. 这一发现凸显了人类行动对空气中微塑料污染的直接影响.
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:
- 微塑料是普遍存在的环境污染物.
- 大气沉积是微塑料运输的关键途径.
- 了解人类活动对微塑料污染的影响至关重要.
研究的目的:
- 为了比较大气中微塑料沉积率在国家封锁之前和期间.
- 研究人类活动减少对微塑料沉积的影响.
- 在大气沉积中识别占主导地位的微塑料聚合物.
主要方法:
- 大量的大气沉积物从大巴黎的一个植被屋顶上收集到.
- 微塑料被分析使用微里叶变换红外 (微FTIR) 成像.
- 锁定 (2020年春季) 的存款数据与正常活动期间 (2021年春季) 的存款数据进行了比较.
主要成果:
- 总体而言,在封锁期间,微塑料沉积率明显较低 (中位数为5.4 MP m-2 d-1),相比正常活动 (中位数为29.2 MP m-2 d-1).
- 在最小的微塑料大小小部分中没有观察到这种减少.
- 聚烯 (PP),聚乙烯 (PE) 和聚烯 (PS) 是主要的聚合物.
结论:
- 封锁期间人类活动减少与大气中微塑料沉积量的减少直接相关.
- 大气中的微塑料沉积对人为影响非常敏感.
- 这项研究为人类活动对微塑料的直接环境影响提供了新的见解.
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