Photocatalytic degradation of indole in a circulating upflow reactor by UV/TiO2 process--influence of some operating parameters.
The present work involves the photocatalytic degradation of indole on a recirculating reactor. The effects of various factors as initial concentration of indole, catalyst-loading, pH, agitation and flow rate of the solution on the photodegradation were examined. The experimental results indicate that the optimal pH for indole elimination is about 6-7; the effect of catalyst loading shows an optimal value (1g/L) which is necessary to degrade indole; the increase of recirculating rate leads to a decrease of degradation rate due to the reduction of the residence time; the agitation speed has a slight influence on the indole degradation by improving the mass transfer step. Finally, L-H model was used to fit experimental results concerning the influence of experimental data. L-H model constants' were determined also.
Merabet
Smail
S
Laboratoire d'hydraulique appliquée et environnement, Université A. Mira, 06000 Bejaïa, Algeria.
Bouzaza
Abdelkrim
A
Wolbert
Dominique
D
D002384:Catalysis; D004867:Equipment Design; D006863:Hydrogen-Ion Concentration; D007211:Indoles / Q000737:chemistry / Q000528:radiation effects*; D007220:Industrial Waste / Q000517:prevention & control; D007700:Kinetics; D010782:Photolysis; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods
D007211:Indoles; D007220:Industrial Waste; C009495:titanium dioxide; C030374:indole; D014025:Titanium