摘要: Hundreds of consumer products are on the market that contain metallic silver nanoparticles. Given potential toxicity silver, these engineered nanoparticles currently under intense scrutiny by environmental and occupational scientists ( 1 ) regulators 2 ). The reason for this interest is physical chemical properties particles in nanorange (from about to 100 nm) can be different from larger or dissolved compounds, it not yet clear whether also require a new more rigorous human risk assessment compared with their counterparts. In recent article, Kim et al. 3 reported discovery identification sulfide (Ag2S) sewage sludge. This finding provides some insight into fate had been introduced various forms environment.