Table 3: The results of the treatment of dye effluents.

Dyes degradation after Reduction of color     Effluent (nm) Photocatalytic system 60 min of irradiation In the photocatalytic process In the physical  processes   Y (%) Total decolorization of effluents at COD removal after 300 min   after 60 min of irradiation   Total (%) of irradiation (%)         X (%) (min−1) Z (%) (min−1)           FeCl3 ~0 ~0 2 ~0 −606 −593     340 TiO2 37 0.008 ± 0.002 26 0.006 ± 0.002 3 28       TiO2/FeCl3 10 0.002 ± 0.001 78 0.024 ± 0.003 −347 1       FeCl3 ~0 ~0 ~0 ~0 −147 −155     430 TiO2 58 0.014 ± 0.003 36 0.008 ± 0.002 4 40   WPac   TiO2/FeCl3 17 0.003 ± 0.002 49 0.010 ± 0.002 −76 11 ~0.14.9a   FeCl3 ~0 ~0 ~0 ~0 −17 −20   540 TiO2 86 0.030 ± 0.005 57 0.014 ± 0.002 3 58       TiO2/FeCl3 40 0.008 ± 0.002 22 0.004 ± 0.001 −7 17       FeCl3 n.d.b n.d. 3 ~0 4 7     610 TiO2 n.d. n.d. 83 0.030 ± 0.004 4 84       TiO2/FeCl3 n.d. n.d. 35 0.006 ± 0.002 11 42       FeCl3 ~0 ~0 ~0 ~0 95 95     510 TiO2 24 (63)c 0.004 ± 0.002 11 0.002 ± 0.000 14 24   WLeat   TiO2/FeCl3 ~30 (100)c 0.005 ± 0.001 11 0.002 ± 0.001 95 95 ~0.40.15a   FeCl3 n.d. n.d. ~0 ~0 100 100   620 TiO2 n.d. n.d. 21 0.003 ± 0.001 18 36       TiO2/FeCl3 n.d. n.d. 100 — 96 100       FeCl3 ~0e ~0 10 <0.001 50 53 ~0 WFlax 350d TiO2 10e 0.001 ± 0.001 22 0.003 ± 0.002 ~0 22 −40     TiO2/FeCl3 35 ÷ 42e 0.008 ± 0.002 50 0.011 ± 0.003 33 66 −33     FeCl3 ~0 ~0 ~0c ~0 96 96c ~0 WCot 480 TiO2 ~0 ~0 5c ~0 ~0 5c 11     TiO2/FeCl3 ~0 ~0 5c ~0 97 96c 7

aIn the presence of FeCl3, TiO2, and TiO2/FeCl3, respectively, bno data, cafter 300 min of UV-a iradiation, dabsorption band without clear maximum, ebased on the peak area measurement at 480 nm using HPLC method.