The effect of electric field on the surface of nanoparticles (TiO_2 SiO_2) and its application to retardation of membrane fouling

摘要

The recirculation of raw water containing 0.1 wt% nanoparticles through 30 kV electrostatic device induced the change of zeta-potentials for TiO_2 and SiO_2, respectively, by 40 mV (from +20 mV to -20 mV) and 6 mV (from -18 mV to -24 mV). The electrostatic field increased the zeta potential of colloidal particles negatively through the electrostatic device, consequently leading to the retardation of membrane fouling due to more electrostatic repulsion.