Main physicochemical parameters of nZVI suspensions prepared in Milli-Q water and OECD algal growth medium.

Measurements were conducted at 25°C. Effective diameter and ζ-potential in milli-Q water were performed in the presence of 10 mM KCl. Data are expressed as mean ± standard deviation (SD) when applicable.1: Effective diameter (hydrodynamic diameter measured by dynamic light scattering (DLS).3: Total surface area (SSA) is calculated according to equation 1.Main physicochemical parameters of nZVI suspensions prepared in Milli-Q water and OECD algal growth medium.