本项目针对老化进程中微塑料对水体中重金属离子的环境行为影响与机制尚不明晰的研究现状，以Cu2+、Zn2+等水体中典型重金属离子为目标污染物，揭示不同老化程度微塑料的结构、形貌与表面化学性质对重金属离子吸附行为的影响与匹配构效关系，在此基础上，阐明老化微塑料对水体中重金属污染物迁移行为的影响与作用机制。同时，结合室内模拟与野外验证实验，通过评价重金属在浮游植物和浮游动物体内的富集效应，揭示老化微塑料与重金属对典型浮游生物的毒性效应，以及上述复合污染体系中可能存在的协同-竞争作用机制。本项目研究成果可以为科学评价老化微塑料与重金属污染物共存体系下的水生态环境效应研究提供理论基础，也为微塑料存在下的污水治理技术提供技术支撑。

To find out the effects of microplastics during light aging process on the transport of heavy metals in aquatic environment, the adsorption of Cu2+ and Zn2+ by the aged mircroplastics in terms of structure, morphology and chemical characteristics will be investigated in this research. Furthermore, the mechanism of aged mircroplastics influencing on the transport of heavy metals in the aquatic environment will be illuminated. Meanwhile, the toxic effects of the combination of aged microplastics and heavy metals on typical phytoplankton-zooplankton can be explored based on the lab-scale and field experiments. Besides, the cooperation and competitive behavior of the compound pollution under this condition will also be revealed. The results of this study can not only indicate the ecological and environmental effects with the coexistence of microplastics and other contaminants, but also can provide the scientific data for the wastewater treatment in the presence of microplastics.