Oxidation of phenol using LaMnO 3 perovskite, TiO 2 , H 2 O 2 and UV radiation

LaMnO 3 perovskite has been used for the treatment of aqueous solution of phenol using stoichiometric amount of H2O2 and combination of TiO 2 and UV radiation. The oxidation of phenol was studied with [UV radiation]; [H 2O2 and UV]; [TiO 2 and UV]; [LaMnO 3 and UV]; [TiO 2, H 2O2 and UV]; [LaMnO 3, H 2O2 and UV]; to establish the effectiveness of different systems when compared with perovskite catalyst. Results show that the phenol degradation efficiencies decreased in the following order [LaMnO 3, H 2O2 and UV] > [TiO 2, H 2O2 and UV] > [LaMnO 3 and UV] > [TiO 2 and UV]> [H 2O2 and UV ] > [UV]. UV-VIS spectra result of phenol degradation shows that as the concentration of catalyst increases, its activity increases. The optimum concentration of catalyst was 0.60 g/L for 100 ppm phenol solution. Perovskite catalyst after reaction is completely regenerated by calcinations at 800°C for 2 h and retains a similar catalytic performance.