Distribution and bioavailability of ceria nanoparticles in an aquatic ecosystem model

► We simulated a freshwater ecosystem in laboratory. ► A radiotracer technique was used as the quantitative method. ► Distribution and fate of ceria NPs in the aquatic ecosystem model were studied. ► Hornworts, snails and fish quickly accumulated and desorbed the ceria NPs. ► Sediments were found to be the ultimate sink of ceria NPs.