微塑料的命运在农村的头水湖区
Brittany Welsh1, Andrew M Paterson2, Huaxia Yao2
1School of the Environment, Trent University, Peterborough, Ontario K9L 0G2, Canada.
Environmental science & technology
|September 4, 2024
概括
大气沉积是农村湖泊中微塑料的主要来源. 这些MP可以在湖泊中停留3-12年,突出显示湖泊是重要的MP水库.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 水的质量 水的质量
背景情况:
- 微塑料污染是一个日益严重的全球问题,影响淡水生态系统.
- 了解湖泊中的微塑料来源,运输和命运对于有效管理至关重要.
研究的目的:
- 在12个月的时间里,量化农村山头湖流域的微塑料 (MP) 流量.
- 估计微塑料在淡水湖泊中的停留时间,使用一种新的采集区颗粒平衡方法.
- 为了确定研究区域中占主导地位的MP来源和聚合物类型.
主要方法:
- 一项为期12个月的研究在加拿大安大略省的三个乡村湖区进行.
- 采用了流域颗粒平衡方法,考虑了大气沉积,溪流流入/流出和沉积.
- 微塑料样本分析了形状,聚合物类型,并量化以确定流量和停留时间.
主要成果:
- 大气沉积 (3.958.09英里/米2/天) 是比河流流入 (2.212.34英里/米2/天) 更大的每日微塑料来源.
- 微塑料在陆地流域 (4471%) 和湖泊 (3049%) 发生了显著的保留.
- 据估计,微塑料在湖泊中的停留时间在3至12年之间,其中聚乙烯二甲是最常见的聚合物.
结论:
- 大气沉积是微塑料进入农村湖泊系统的关键途径.
- 淡水湖泊充当了微塑料的大量储存库,因为它们的长时间存在.
- 微塑料污染的特征因环境介质而异,纤维在水中占主导地位,沉积物中是碎片.
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