Photocatalytic Study of Cyanide Oxidation Using Titanium Dioxide (TiO2)-Activated Carbon Composites in a Continuous Flow Photo-Reactor

The photocatalytic oxidation of cyanide by titanium dioxide (TiO2) supported on activated carbon (AC) was evaluated in a continuous flow UV photo-reactor. photo-reactor made glass and covered with wood box to isolate the fluid external conditions. TiO2-AC synthesized impregnation TiO2 granular AC composites characterized inductively coupled plasma optical emission spectrometry (ICP-OES), Scanning Electron Microscopy (SEM), nitrogen adsorption-desorption isotherms. Photocatalytic adsorption tests were conducted separately simultaneously. results showed that 97% CN− degraded within 24 h due combined adsorption. To estimate contribution only adsorption, two-stage performed. First, 74% ion degradation reached under dark This result attributed generation H2O2 surface AC. Then, 99% obtained through photocatalysis during h. These photo-reactor’s design enhanced performance compared an agitated batch system. Therefore, use is promising process for aqueous solutions.