[Transformation Behavior and Environmental Effects of Microplastics in Soil-groundwater]

As an emerging pollutant, microplastics exist widely in the environment. At present, the research on microplastics mainly focuses on the atmosphere, ocean, river, and other environmental media. Soil-groundwater has become a significant sink and has received increased interest in recent years. However, the understanding of the transformation behavior and environmental effects of microplastics in the soil-groundwater environment is not yet well understood. Therefore, this review mainly focused on： ① the present research status and progress of microplastics in the soil-groundwater； ② the source and distribution of microplastics； ③ the biological and non-biological transformation of microplastics； and ④ the non-biological enrichment, biological enrichment, and transport effects of microplastics. Additionally, in order to better understand the transformation behavior and environmental effects of microplastics in soil-groundwater in the future, this review systematically summarized and analyzed the shortcomings and limitations of microplastics research status and supplemented and prospected future research directions.