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在不同土地利用系统中对全球土壤微塑料的评估在很大程度上取决于分析方法:元分析

Olivia Wrigley¹, Melanie Braun¹, Wulf Amelung¹

¹Institute of Crop Science and Resource Conservation (INRES) - Soil Science and Soil Ecology, University of Bonn, Nussallee 13, 53115 Bonn, Germany.

The Science of the total environment

|October 31, 2024

概括

微塑料污染在陆地环境中普遍存在,特别是在农村农业土壤中. 根据土地使用和分析方法,度的差异很大,这凸显了对标准化土壤微塑料分析的需求.

科学领域:

环境科学环境科学
土壤科学土壤科学
生态毒理学生态毒理学

背景情况:

微塑料 (MPs) 是新兴的污染物,其陆地流行程度尚不清楚.
关于土壤MP的现有研究在地理上有偏见,大多数研究是在亚洲进行的.
不同的方法使得跨研究的MP度直接比较变得复杂.

研究的目的:

为了比较不同农业生态系统中的微塑料度.
调查输入路径和土地利用对土壤MP负载的影响.
为了考虑微塑料分析的方法变化.

主要方法:

89项研究的元分析,包括553个全球站点.
包括考虑MP大小,采样深度,密度分离解决方案和有机物去除的数据.
统计分析以比较不同土地使用和城市化水平的MP负载.

主要成果:

全球平均土壤MP负荷为2900 ± 7600项kg-1,明显高于480项kg-1.1的中位数.
在温室下的土壤中观察到的最高MP度,塑料覆盖和污泥修正.
随着城市化程度的下降,MP负载增加,在农村地区最高;方法选择显著影响结果.

结论:

陆地农业生态系统,特别是农村土壤,存在大量的微塑料污染.
温室,塑料覆盖和污泥应用是土壤MPs的重要来源.
微塑料分析方法的标准化对于准确的全球评估至关重要.

关键词:

耕地土壤耕地土壤密度分数化密度分数化环境污染环境污染合成聚合物合成聚合物

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