河流水沙运动对微塑料运移过程影响研究进展

对河流中微塑料的分布、微塑料在河流中发生的聚沉、重悬、水平运输和潜流交换等迁移过程进行了归纳总结.由于河流中广泛存在的泥沙会影响微塑料的迁移.本研究剖析了含沙河流中微塑料迁移,包括微塑料与泥沙的聚集和共沉降,沉积物对微塑料的再悬浮和渗透过程影响,探究了微塑料与泥沙的相互作用机制和影响因素.提出未来含沙河流中微塑料的运移...

Recent progress of the effect of suspended sediment movement on the transport of microplastics in rivers

This review summarized the occurrence and abundance of microplastics (MPs) firstly and then the main transformation processes of MPs in rivers, including aggregation, settling, rising, resuspension, horizontal migration, and hyporheic exchange. In this paper, we critically evaluated the transportation of MPs in sediment-laden river, such as the heteroaggregation and co-settling of MPs with suspended sediments, influence of sediments on the resuspension and infiltration of MPs. The interaction mechanisms between suspended sediments and MPs concerning influencing factors of MP transportation have been discussed. Finally, recommendations for future research were discussed:(1) reliable models for predicting the migration process and flux of MPs in rivers are needed to develop; (2) researchers are suggested to use aged-MPs to conduct experiments, and consider the effect of turbulent water and organisms on the transportation behavior of MPs during laboratory work.