Abstract: Six transition metal (Cu,Fe,Zn,Ni,Mn,Ce) compounds were loaded on activated carbon (AC) by impregnation method to yield six catalysts (AC/M(M=Cu,Fe,Zn,Ni,Mn,Ce)) that were assessed as ozonation catalysts for the removal of aqueous phenol solution and textile dyeing sludge at room temperature. The resultant products were characterized by Boehm titrations,XRD and BET analyses. The presence of AC/M catalysts considerably improved their degradation in the ozonation of phenol and textile dyeing sludge. The phenol decomposition were evaluated using three catalytic systems:a) ozone(O₃),b) AC/M catalysts,and c) a mixture of AC/M catalysts and O₃. It was found that catalytic activity toward the degradation of phenol decreased in the order of c b a.Among the six catalysts for phenol decomposition,the order of AC/Fe AC/Zn AC/Ni AC/Ce AC/Cu AC/Mn was followed. For all the catalysts,their catalytic activities toward phenol degradation increase with the increase of pH value of phenol solution. For practical textile dyeing sludge,the similar order for the decomposition of phenol could be maintained except the catalytic activities of AC/Ce and AC/Ni are comparable. Using AC/Fe catalyst,together with ozone,the organic matter of textile dyeing sludge could be reduced by 8.17%.