Background and aims

Microplastics (MPs) are persistent pollutant distributes in sea, soil, and atmosphere widely. Nowadays, there has been an increasing awareness of negative impact of MPs on the environment, especially focusing on extensive research in the aquatic environment. However, there is still a significant research gap in the study of MPs in soil, despite the serious harm to soil.

Methods

This review conducts literature analysis by Citespace software, counting the distribution of MPs in different soils, analyzing the sources and types of MPs, integrating the accumulation and fate of MPs, and summarizing methods of separation and identification MPs in soil.

Results

The research on MPs in soil is sparse, with limited funding. Importantly, the annual average growth rate of MPs discharge into farmland exceeds into marine, and the comparability of detection results is poor. Research has found, synthetic textiles, tyres, and urban dust are the main sources, which mainly introduce through atmospheric sedimentation, sewage irrigation, sludge farming, and the use of agricultural film. What’s more, MPs in soil may have the risk of leaching from groundwater and contaminating it. Therefore, it is essential to establish a standard quantitative method for extracting and identifying microplastics in soil to better control their impact on the planting industry.

Conclusion

The MPs in soil seriously affect the growth of plants. Nutrient transfer and intergenerational transmission effects pose potential risks to human health. Consequently, the degradation of MPs by microorganisms in soil is an environmentally friendly and economically worthy topic for in-depth research.

中文翻译：

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土壤微塑料：研究现状、来源、方法和修复策略综述

 背景和目标

微塑料（MPs）是一种持久性污染物，广泛分布于海洋、土壤和大气中。如今，人们越来越意识到议员对环境的负面影响，特别是关注对水生环境的广泛研究。然而，尽管MPs对土壤造成严重危害，但土壤中MPs的研究仍存在显着的研究空白。

 方法

本文通过Citespace软件进行文献分析，统计MPs在不同土壤中的分布，分析MPs的来源和类型，整合MPs的积累和去向，总结土壤中MPs的分离和鉴定方法。

 结果

对土壤中 MP 的研究很少，资金也有限。重要的是，排入农田的MPs年均增长率超过排入海洋，检测结果的可比性较差。研究发现，化纤纺织品、轮胎、城市扬尘是主要来源，主要通过大气沉降、污水灌溉、污泥养殖、农膜使用等途径引入。更重要的是，土壤中的MP可能有从地下水中浸出并污染地下水的风险。因此，有必要建立土壤中微塑料的提取和鉴定标准定量方法，以更好地控制其对种植业的影响。

 结论

土壤中的MPs严重影响植物的生长。养分转移和代际传递效应对人类健康构成潜在风险。因此，土壤中微生物对MP的降解是一个环境友好且具有经济价值的深入研究课题。