Table S1: WWTP maximum allowable influent silver concentrations, $ C_0 $ (ppb), that would result in an effluent silver concentration lower than 1.9 ppb as a function of operational parameters MLSS and $ \theta $.Table S1: WWTP maximum allowable influent silver concentrations, $ C_0 $ (ppb), that would result in an effluent silver concentration lower than 1.9 ppb as a function of operational parameters MLSS and $ \theta $.