purification; wastewater; optimization; organic dyes; ferrite; kinetic equations; photocatalysis; sorption


The relevance of the work is related to the solution of environmental problems arising from an increase in the amount of industrial waste water contaminated with organic dyes. The aim of the work was to optimize the process of wastewater treatment from organic dyes – methylene blue, methylviolet and Congo red, when using copper-zinc ferrite, taking into account the change in its mechanism over time and varying the process parameters: the concentration of dye solutions or ferrite mass. Quantitative kinetic characteristics of the process of cleaning solutions from organic dyes with a ferrite composite material of the composition Zn0.875Cu0.1Fe4.42O4 at various mass ratios n = "ferritic composite material: organic dye" are determined. It was proved that the purification of wastewater from organic dyes proceeds through the mechanisms of photocatalytic transformations and sorption and the kinetic characteristics of photocatalytic processes are an order of magnitude higher than those for the adsorption of dyes. An experimental database on wastewater treatment from dyes was created for each mechanism separately. The kinetic equations for the dependence of the concentration of dyes on time and the ratio n are calculated. The cleaning process was optimized for one or two process mechanisms progress while varying the process time, the initial dye concentration or ferrite mass, depending on the need to achieve certain process rates and the depth of cleaning. A scheme of a method for optimizing the process of wastewater treatment from organic dyes using a copper-zinc ferrite composite is proposed. The results are aimed at improving the efficiency and completeness of the purification process. A significant increase in the economic effect of the introduction of the cleaning process is predicted, since it is proposed to use waste from galvanic production for the production of copper-zinc ferrites.


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