In this work, an application of mean centering of ratio spectra is proposed to the study of pollutant dyes degradation using Fenton reaction. Two-way kinetic-spectrophotometric data related to dye(s) mixtures degradation are divided into simulated kinetic profiles, mean centered and their ranks were monitored versus simulated dye degradation constant. For accurate dye degradation constant(s), the rank of resulted matrix will be reduced by one. By this search, all kinetic constants related to all included dyes are acquired. To find out which k values are related to the degradation of dye of interest, a preliminary deflation of data from its contribution is done and the procedure is repeated. By this search, the kinetic constant related to dye of interest will be omitted while others will be remained. The applicability of the proposed method was evaluated using model data. Finally, second-order kinetic-spectrophotometric data in the degradation of malachite green in the presence of crystal violet and methylene blue were analyzed by the proposed method as a real system.
