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Geographical features and management strategies for microplastic loads in freshwater lakes

文献类型： 外文期刊

作者： Dong, Huike 1 ; Zhang, Ruixuan 1 ; Wang, Xiaoping 1 ; Zeng, Jiamin 1 ; Chai, Lei 1 ; Niu, Xuerui 1 ; Xu, Li 5 ; Zhou, Yunqiao 1 ; Gong, Ping 1 ; Yin, Qianxue 1 ;

作者机构： 1.Chinese Acad Sci, Inst Tibetan Plateau Res, State Key Lab Tibetan Plateau Earth Syst Environm, Beijing, Peoples R China

2.Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou, Peoples R China

3.Univ Chinese Acad Sci, Beijing, Peoples R China

4.China Agr Univ, Coll Resources & Environm Sci, Beijing, Peoples R China

5.Beijing Acad Agr & Forestry Sci, Inst Qual Stand & Testing Technol, Beijing, Peoples R China

6.Beijing Municipal Key Lab Agr Environm Monitoring, Beijing, Peoples R China

期刊名称：NPJ CLEAN WATER （ 影响因子：11.4； 五年影响因子：14.1 ）

ISSN： 2059-7037

年卷期： 2025 年 8 卷 1 期

页码：

收录情况： SCI

摘要： In recent years, microplastic contamination in freshwater lakes has become a significant environmental concern. Despite this, there remains a lack of comprehensive understanding of the distribution patterns and regional characteristics of microplastic loads in global lacustrine environments under a unified standard. To address this gap, our study utilizes Machine Learning (the random forest algorithm), combined with number-to-mass transformation techniques to generate a global prediction. The results indicate an average microplastic concentration of 0.57 items/m3 in lakes and reservoirs worldwide, with an accumulated microplastic load of 10167 tons within top 20 m of water-equivalent to 508 million plastic bottles. The primary sources of microplastics are linked to agricultural land use and the proportion of urban areas within watersheds. Notably, the highest microplastic loads are observed in North America, Africa, and Asia, though the contributing factors vary, including concentration-dependent and area-dependent influences, as well as differences in shape composition. These findings provide valuable insights that can guide the development of targeted policies to effectively mitigate microplastic pollution in freshwater ecosystems.

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