Advanced removal of crystal violet dye from aqueous solutions by photocatalysis using commercial products containing titanium dioxide

Two commercial products containing titanium dioxide, P-25 and Kronos 7000, were used for the detailed investigation of the advanced degradation of crystal violet (CV) dye by photocatal-ysis. The parametric study concerning the influence of the initial dye concentration, photocatalyst dose, pH of the medium and hydrogen peroxide addition in the reaction batch was performed. The net superiority of P-25 in the decolorization was further highlighted by measuring the mineralization degree by TOC. The potential application of the results is confirmed by reaching 86-87% mineraliza-tion degrees after 180 min in the presence of 1 g center dot L-1 P-25 or in 120 min using additionally 100 ppm H2O2.