According to the report of Emerging Nanotechologies
Program[1], there are about 1300 types of commercial
nanomaterials introduced to the market and about 20% of
them are related to silver nanoscale products. Owing to the
special antimicrobial activities, silver nanoparticles (AgNPs)
are widely used in fields of textile, water purification
instruments, cosmetics, etc. Specific nanoscale materials are
not only providing unique characteristic but also increasing
toxicity to ecological environment and becoming emerging
contaminants[2,3]. The environmental behavior and ecological
risk of AgNPs such as environmental migration, transformation
and fate cannot just be predicted by relevant ion or