Ozonation of Reactive Blue 81 in the bubble column.
The decolourisation process of the Reactive Blue 81 was carried out in a laboratory bubble column reactor with inner diameter 110 mm and working height 550 mm, equipped with a porous glass ozone diffuser (diameter 50 mm). A model of ozone absorption with the chemical reaction in the liquid phase was employed. It was found that the decolourisation proceeds in the fast pseudo first-order regime. The average value of the enhancement factor was calculated from the experimental results and compared with those calculated according to the theory of mass transfer with a second-order chemical reaction. In order to determine the intrinsic kinetics of ozonation, a stopped-flow technique was employed. The rate constant of the dyestuff reaction with ozone was determined as equal to 4.5 x 10(7) mol/(dm3.s).
Ledakowicz
S
S
Faculty of Process and Environmental Engineering, Technical University of Lódź, Poland.
Maciejewska
R
R
Perkowski
I
I
Bin
A
A
D000042:Absorption; D001391:Azo Compounds / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D007700:Kinetics; D009282:Naphthalenesulfonates / Q000737:chemistry*; D010083:Oxidants, Photochemical / Q000737:chemistry*; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D014876:Water Pollution / Q000517:prevention & control
D001391:Azo Compounds; D004396:Coloring Agents; D009282:Naphthalenesulfonates; D010083:Oxidants, Photochemical; C448314:reactive blue 81; D010126:Ozone