Activation of H2O2 by Amberlyst-15 resin supported with copper(II)-complexes towards oxidation of crystal violet

Copper(II) amine complexes supported on Amberlyst-15 cation resin were prep ared and characterized by SEM, EDX and FTIR measurements. The kinetics of t he heterogeneous oxidation of an organic dye, crystal violet, with H2O2 cat alyzed by the supported catalysts was investigated in aqueous solution. The rate of reaction increases with increasing stability of the copper(II) ami ne complexes. The oxidation rate attained a first-order in the catalyst and the dye only at lower concentrations and second order in H2O2. A very fast formation of a peroxo-dye intermediate resulting from the interaction of H 2O2 with the dye even in the presence of the catalyst was observed. (C) 200 1 Elsevier Science Ltd. All rights reserved.