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1722227 
Journal Article 
Kinetics of heterogeneous catalytic ozone decomposition in water on an activated carbon 
Beltran, FJ; Rivas, J; Alvarez, P; Montero-De-Espinosa, R 
2002 
1 
Ozone: Science and Engineering
ISSN: 0191-9512
EISSN: 1547-6545 
24 
4 
227-237 
WOS:000187293400001 
Ozone decomposition in water in the presence of an activated carbon has been studied. Variables investigated were agitation speed, carbon particle size, temperature and pH. In all cases, the presence of activated carbon improved the ozone decomposition rate. Between pH 2 and 7 the ozone decomposition rate due to both the homogeneous and heterogeneous mechanisms hardly varied while a significant increase was noticed with increasing pH. A kinetic study based on a Langmuir-Hinselwood type mechanism for the heterogeneous surface reaction was undertaken. According to this mechanism the heterogeneous ozone decomposition kinetics can be simplified to follow a first order process. Fit of experimental results to the kinetic equations derived from the mechanism allowed for the determination of the apparent first order rate constants of the ozone surface heterogeneous reaction and adsorption equilibrium constants. 
ozone; activated carbon; catalytic ozone decomposition; kinetics