Chemistry and transport of silver nanoparticles in environmentally relevant conditions

摘要: The fate and transport of citrate PVP silver nanoparticles (AgNPs) was determined using large scale mesocosm studies with synthetic water seasonal variations natural lake water. We were able to produce a simple diffusion-sedimentation mathematical model which modifies sedimentation diffusion equations for particles moving through column. introduced AgNP parameters including size starting concentration predict infer mechanisms in 1 meter tall column over time. Ionic strength had direct impact upon the behaviour transformations observed by two different surface coated AgNPs. Water collected summer contained high TOC concentrations low ionic strength. increased stability AgNPs remained as duration study Winter lowest Citrate showed aggregation dissolution, whereas stable. At times year NPs change during warmer months persist particulate forms longer periods time waters.