Optimized photocatalytic degradation of Alcian Blue 8 GX in the presence of TiO2 suspensions.
The photocatalytic degradation of Alcian Blue 8 GX, a cationic copper phthalocyanine dye, has been investigated in aqueous suspensions containing the commercial catalyst TiO(2) P-25. The photodegradation of the organic molecule follows approximately a pseudo-first kinetic order, according to the Langmuir-Hinshelwood model. The effect of catalyst concentration, pH of the initial solution and the H(2)O(2) concentration upon the reaction rate was ascertained. It was shown that the photocatalytic degradation reaction can be mathematically described as a function of parameters such as pH, H(2)O(2) concentration and irradiation time, being modeled by the use of the response surface methodology. Optimized values for oxidizing agent, concentration, pH and UV exposure time for the studied system were determined.
Caliman
Anca Florentina
AF
Department of Environmental Engineering and Management, Gh. Asachi Technical University, Bd. Mangeron 71A, 700050 Iasi, Romania.
Cojocaru
Corneliu
C
Antoniadis
Apostolos
A
Poulios
Ioannis
I
D000423:Alcian Blue / Q000737:chemistry* / Q000528:radiation effects*; D002384:Catalysis; D003116:Color; D004396:Coloring Agents / Q000737:chemistry* / Q000528:radiation effects*; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010777:Photochemistry; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods*
D004396:Coloring Agents; C009495:titanium dioxide; D006861:Hydrogen Peroxide; D014025:Titanium; D000423:Alcian Blue