What is the mobility and stability of silver released into other environmental media such as soil or groundwater?
Silver thiosulfate complexes, at the concentrations typically found in photographic processes is not toxic to plants or soil organisms if it were spilled onto the ground. Silver thiosulfate is rapidly oxidized by air to form silver sulfide and sulfate. Silver sulfide is insoluble, very stable, not biologically available and not mobile in soils. Thus, silver sulfide does not migrate into groundwater.
