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Oxidative degradation of  o -,  m - and  p -cresols using ozone in the presence of V 2 O 5 -supported metal (Mn, Fe, Ni) catalysts was studied under ambient reaction conditions. Metal (Mn, Fe, Ni) loaded V 2 O 5  catalysts were prepared using a wet-impregnation method, thereafter, characterized, and analyzed by use of the XRD, FT-IR, SEM-EDX, TEM, and ICP-OES. Results show the effect of the amount of a metal that was loaded on the support, particularly, how it affects the resultant catalysts’ (i) crystallite size, (ii) dispersion of an active metal over the surface of a support, and (iii) catalytic activity. Mn-loaded catalysts were found to be relatively more active for the conversion of individual cresol isomers and the activity of this catalyst was significantly enhanced at a lower Mn to V 2 O 5  ratio (2.5 wt%). Mn(2.5 %)/V 2 O 5  catalyst led to conversions of 66.78, 71.01 and 73.68 % with  o -,  m -, and  p -cresols respectively within 24 h of oxidation. Oxidation products were derivatized by ethanol and a few were positively detected using GC-MS.  o -Tolyl acetate and 2,5-dihydroxy toluene were detected from  o -cresol,  m -tolyl acetate, and 2,3-dihydroxy toluene from  m -cresol and  p -tolyl acetate and 3,4-dihydroxy toluene from  p -cresol oxidation. Dimethyl maleate and dimethyl oxalate were detected as common products in all three isomers’ oxidation.

Degradation of o -, m -, p -cresol isomers using ozone in the presence of V 2 O 5 -supported Mn, Fe, and Ni catalysts