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Meso- and microplastic contamination in mulching cultivated soil at a national scale, China

文献类型： 外文期刊

作者： Xue, Yinghao 2 ; Li, Jing 3 ; Jin, Tuo 2 ; Liu, Dongsheng 4 ; Zou, Guoyuan 1 ; Li, Fang 1 ; Wang, Kang 1 ; Xu, Li 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Qual Stand & Testing Technol, Beijing 100097, Peoples R China

2.Minist Agr & Rural Affairs, Rural Energy & Environm Agcy, Beijing 100125, Peoples R China

3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China

4.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr Resources & Environm, Beijing 100097, Peoples R China

关键词： Meso- and microplastics; Mulching cultivated soil; National scale; Affecting factors; Sources

期刊名称：JOURNAL OF CLEANER PRODUCTION （ 影响因子：11.1； 五年影响因子：11.0 ）

ISSN： 0959-6526

年卷期： 2023 年 418 卷

页码：

收录情况： SCI

摘要： The contamination of soil by meso- and microplastics (MMPs) has been drawing increasing attention. However, the pollution characteristics of MMPs in mulching cultivated soil across China remain unclear. This study investigated the distribution of MMPs in long-term mulched soils in 29 provinces of China. MPs were found in all soil samples, while mesoplastics were found in only 29.6% of soil samples. The abundance of MPs in soil was 20.00-640.0 items.kg(-1), and the average abundance was 213.0 items.kg(-1). The average abundance of mesoplastics in the soil was 10.00 items.kg(-1). MMPs were found to be primarily film-shaped (37.2%), blue in color (23.4%), and less than 1000 mu m in size (39.7%), and the primary polymer was polyethylene (PE, 37.2%). Mulching times and crop types were important factors affecting MMP abundance in soil. These findings reveal the nationwide pollution pattern of MMPs in mulching cultivated soil over the long term, provide basic data for MMP pollution at the national scale, and provide a scientific basis for the rational use and management of plastic films and the treatment of soil MMP pollution.

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