Table S2 Comparison of different parameters with previous works for batch mode silver release experiments System State of Initial silver Coating agent description nanoparticle loading (mg/L) Sotiriou et al. Ag-SiO2 dispersed Ag-NP attached No coating 40 (2012, Langmuir) in deionized water on SiO2 agent Ag-NP dispersed Kittler et al. in ultrapure water (2010, Chem. Free Ag-NP Sodium citrate 140 and placed inside a Mater.) dialysis bag Methoxyl Peretyazhko et al. Ag-NP dispersed polyethylene (Environ. Sci. Free Ag-NP 8 in Milli-Q water glycol Technol., 2014) (PEGSH) Ag-AC dispersed Ag-NP adsorbed Tri-sodium Present work 16 in Milli-Q water AC citrate Sotiriou et al. (2012) did not have any coating agent (Table S2) to prevent silver release from the NP, which causes the Ag concentration to bulid-up at the fastest rate amongst these four reports. Absence of coating agent also accelerates the steady state value in this case. Finally,
Table S2 Comparison of different parameters with previous works for batch mode silver release experiments System description State of nanoparticle Coating agent Initial silver loading (mg/L) Sotiriou et al. (2012, Langmuir) Ag-SiO2 dispersed in deionized water Ag-NP attached on SiO2 No coating agent 40 Kittler et al. (2010, Chem. Mater.) Ag-NP dispersed in ultrapure water and placed inside a dialysis bag Free Ag-NP Sodium citrate 140 Peretyazhko et al. (Environ. Sci. Technol., 2014) Ag-NP dispersed in Milli-Q water Free Ag-NP Methoxyl polyethylene glycol (PEGSH) 8 Present work Ag-AC dispersed in Milli-Q water Ag-NP adsorbed AC Tri-sodium citrate 16 Sotiriou et al. (2012) did not have any coating agent (Table S2) to prevent silver release from the NP, which causes the Ag concentration to bulid-up at the fastest rate amongst these four reports. Absence of coating agent also accelerates the steady state value in this case. Finally,
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