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在圣劳伦斯河口的地表水中微塑料的空间分布和风险评估

Noreen E Kelly¹

¹Fisheries and Oceans Canada, 1 Challenger Drive, Dartmouth, NS, Canada.

The Science of the total environment

|July 3, 2024

概括

这项研究量化了圣劳伦斯河口的微塑料污染,发现废水流出口和农业区附近的度最高. 虽然整体生态系统风险较低,但一些城市地区面临着高的微塑料污染风险.

科学领域:

环境科学环境科学
海洋生物学海洋生物学
生态毒理学生态毒理学

背景情况:

海洋塑料污染日益令人担忧,需要了解运输路径.
河口是塑料垃圾进入海洋环境的关键接口,但其作用尚不清楚.
有效的缓解需要量化微塑料的来源,分布和生态风险.

研究的目的:

量化圣劳伦斯河口 (SLE) 表面水中的微塑料 (MP) 度和分布.
确定MP水平与海洋学/人类学因素之间的关系.
评估SLE中MP污染的生态风险.

主要方法:

微塑料 (50-3200微米) 根据形态,颜色和大小被确定.
福里埃变换红外光谱法 (FTIR) 确定了聚合物类型.
使用了通用线性模型和风险评估模型.

主要成果:

平均表面MP度为120±42颗粒子m−3.
最高的MP度发现在河流部分,近废水流出和农业用地.
纤维和碎片≤250μm是最常见的;聚乙烯二甲,再生纤维素,聚乙烯和基是主要的聚合物.

结论:

在SLE的MP分布是异质的,受到城市和农业来源的接近的影响.
虽然整体生态系统风险较低,但特定的城市地区具有较高的MP污染风险.
这项研究提供了有关MP污染和主要河口生态风险的关键数据.

关键词:

农业农业农业农业人类产生的人类性.一般化的线性模型.塑料污染问题塑料污染问题度度度度废水是废水,废水就是废水.

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