紫外光照老化对微/纳米塑料性质及凝聚行为影响的研究进展

Research Progress on Effects of Ultraviolet Light Aging on Properties and Aggregation Behavior of Micro/Nano Plastics

微塑料和纳米塑料引起的环境污染的问题近年来备受关注。在众多环境因素中,太阳光照,尤其是紫外线,是驱动微/纳米塑料老化的关键因素、导致其理化性质与环境行为发生显著变化。本文综述了紫外光照老化对微/纳米塑料理化性质的影响,包括表面特性、粒径、形态及化学结构的变化。同时,探讨了光照老化对纳米塑料凝聚行为的影响,尤其是水体环境中的凝聚行为。本文还评估了光老化后微/纳米塑料的生态和毒理学效应,特别是对水生生态系统和人类健康的潜在风险,指出了未来的研究方向。

Environmental pollution caused by microplastics and nanoplastics has received increasing attention.Among various environmental factors,solar radiation,particularly ultraviolet(UV)light,plays a key role in driving the aging processes of these plastics,leading to significant changes in their properties and environmental behavior.The effects of UV-induced aging on the physicochemical properties of micro-and nanoplastics were comprehensively explored,such as alterations in surface characteristics,particle size,morphology and chemical structure.Additionally,it delved into how UV aging influences the aggregation dynamics of nanoplastics,with an emphasis on aggregation behavior in aquatic environments.The ecological and toxicological impacts of UV-aged micro-and nanoplastics were further evaluated highlighting the potential risks to aquatic ecosystems and human health.Lastly,future research directions were identified to address current knowledge gaps in this field.