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The research literature has rarely been reported in the simulated dye decolorization research literature, usually single dye as a model of mixed dye wastewater system. Literature usually the maximum absorption at a wavelength of absorbance as a measure of, the calculated total dye decolorization rate, the lack of the information of the composition of the solution in the bleaching process, and its calculation method is the apparent system error. In this paper, to restore the spectroscopic data analysis the decoloration process in the wastewater oxidation of mixed dye solution, residual chroma composition analysis, dye decolorization rate and decolorization kinetics. Particle light scattering and intermediates of Fenton oxidation of simulated dye wastewater data analysis acidic red, reactive violet, direct acid red, orange G, and Direct Fast Scarlet and Orange G mixed dye system as the research object, the experimental results show that the Spectrophotometric study dye Fenton oxidation process, the intermediate produced in the light scattering caused by the particles and the oxidation process, resulting in the decolorization rate, such as the reaction rate constant values ??of the parameters there is a large systematic error. In Fenton oxidation process of a single dye, the free state of the dye, the intermediate product and the particle scattering is the three components of the residual chroma. In the initial stage of the oxidation, the free state of the dye is a major component of the residual chroma, as the oxidation reaction proceeds, the dye-free state reduce the residual chroma, and the particle light scattering and oxidation intermediates arising elevated residual chroma . Late in the reaction, residual chroma mainly composed of particles of light scattering and dye intermediates. Since the particle light scattering and the presence of the intermediate product, so that the high decolorization rate obtained at the maximum wavelength absorbance. Using multiple linear regression method can remove particles scattering and intermediate Oxidation Kinetics and decolorization rate of more reliable dye oxidation reaction of the first order kinetics, and the pH value, the concentration of dye, Fe 2 concentration and H 2 O 2 concentration on decolorization. 2 electro-Fenton method of malachite green and crystal violet oxidation process analysis of titanium electrode as anode, activated carbon fiber cathode examine malachite green and crystal violet electro-Fenton oxidation bleaching process. Electro-Fenton process, the shape of the absorption spectrum of the reaction solution system changes over time, due to the presence of a particle light scattering and oxidation intermediates, there is a large difference between the different indicators of the calculated reaction rate constant and the decolorization rate. PH, sodium concentration, Fe 2 concentration and the current density on the decolorization, the experimental results show that the dynamics of electro-Fenton oxidation dye process is also in line with the first-order kinetics. By multiple linear regression analysis, the study of the composition and distribution of residual chrominance binary mixtures of malachite green and crystal violet dye component system. Competition and synergy exists, both malachite green and crystal violet dye in the binary mixed dye wastewater decolorization process, malachite green oxidation reaction rate than crystal violet reaction rate, which may be due to their structural differences caused by the study of binary mixtures simulated wastewater by electro-Fenton oxidation contribute to the study of the mechanism of Dyeing Wastewater. 3. Electroflocculation method simulated dye wastewater analysis as the dissolution of iron electrode study of acid scarlet, orange G and Direct Violet electroflocculation bleaching process. Electroflocculation process, the sol and dyes generated by the electrode dissolve combined to form a floc, and therefore the absorption spectrum of the dye solution in the electro-flocculation process more seriously affected by the floc light scattering, even if the use of centrifugal and filtration treatment, it is difficult completely eliminate light scattering of colloidal particles of spectrophotometric determination of the concentration of the dye interference by multiple linear regression analysis to eliminate this interference, and research the mixed dye component system, the composition and distribution of residual chroma. Effects of iron electrode the the flocculation acidic scarlet and orange G binary mixing dye simulated wastewater, acid red, orange G and of Direct Violet ternary mixed dye wastewater discoloration, the results show that, in the process of mixing the dye solution flocculation decolorization directly violet decolorization fastest and most easily the acid scarlet followed by orange G decolorization slowest, but also the most difficult to decolorization. Appropriate to extend the power-on time, to improve the decolorization efficiency, but too long electroflocculation produce excessive iron ions form a stable colloidal solution is not easy to unite, so that the treatment effect of variation.
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