关键词: 纳米银, 来源, 迁移转化, 水体环境, 毒性

Abstract: Silver nanoparticles (AgNPs)，as common raw materials of commodities，can be inevitably released into the aquatic environment through various ways，such as synthesis，manufacturing and AgNPs products applications. AgNPs has been found in natural water bodies and wastewater treatment plants. The mitigation and transformation of AgNPs in the aquatic environment could result in the change of its valence and species. This paper focused on the physical，chemical and biological aspects and summarized the key factors affecting AgNPs behaviors，including pH，ionic strength，and electrolyte. Toxicity mechanisms of AgNPs were also analyzed. The relationship between the toxicity mechanism and their fate in the environment was established. The problems need to be solved include establishing the AgNPs concentration database in realistic waters，analyzing the fate and behavior of AgNPs in actual environment，and research on the toxicity mechanism of AgNPs. This paper is aiming at providing theoretical foundation to predict concentrations，behaviors and risks of AgNPs in the environment.

Key words: silver nanoparticles, source, transformation, aquatic environment, toxicity