Optimization of photocatalytic degradation of sulphonated diazo dye C.I. Reactive Green 19 using ceramic-coated TiO2 nanoparticles.
Optimization of photocatalytic degradation of C.I. Reactive Green 19 (RG 19) under UV light irradiation using ceramic-coated TiO2 nanoparticles in a continuous circulation rectangular photoreactor was studied. The used catalyst was TiO2 Millennium PC-500 (crystallite mean size 8 nm) immobilized on ceramic plates. A central composite design was used for optimization of the UV/TiO2 process. Predicted values of decolorization efficiency were found to be in good agreement with experimental values (R2 = 0.97 and Adj-R2 = 0.91). Optimization results showed that maximum decolorization efficiency was achieved at the optimum conditions of: initial dye concentration 10 mg/L, UV light intensity 47.2 W/m2, flow rate 150 mL/min and reaction time 240 min. Photocatalytic mineralization of RG 19 was monitored by chemical oxygen demand (COD) decrease and changes in the UV-Vis spectrum.
Water and Wastewater Company of East Azerbaijan, Tabriz, Iran.
M
M
Rastegar
K Rahmati
KR
Shadbad
A R
AR
Khataee
R
R
Pourrajab
D000704:Analysis of Variance; D057919:Biological Oxygen Demand Analysis; D002516:Ceramics; D004396:Coloring Agents / Q000737:chemistry; D003979:Diazonium Compounds / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D010782:Photolysis; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
C542576:C.I. Reactive Green 19A; D004396:Coloring Agents; D003979:Diazonium Compounds; C009495:titanium dioxide; D014025:Titanium