• Elina B. Khobotova Kharkiv National Automobile and Highway University, Ukraine
  • Vita V. Datsenko Kharkiv National Automobile and Highway University, Ukraine
  • Volodymyr M. Kolodiazhnyi Kharkiv National Automobile and Highway University, Ukraine
  • Denis O. Lisin V. N. Karazin Kharkov National University, Ukraine



ferritic composite material, organic dyes, photocatalysis, sorption, efficiency, mathematical model


Aim. Study of the efficiency (E) of purification of solutions from organic dyes depending on the type of dye, the composition of the Cu-Zn-ferrite composite (FC) and its repeatability, creation of a mathematical model of the cleaning process. Methods. The photocatalytic and sorption properties of FCs were studied spectrophotometrically during the purification of solutions from methyl violet MV, methylene blue MB, and Congo red CR. The mathematical model of the cleaning process was created using the MATLAB application package (Toolbox subsystem). Results. It is shown that the first order of reaction is observed in the entire time interval of the purification process when the mechanism is changed from the predominant photocatalysis to adsorption within 3–5 h. The specific activity of FC is high when purified from all dyes at a mass ratio of “FC: dye” (n) ≥ 500. Anionic character CR reduces E purification in comparison with MV and MB. Re-use of FCs with a reduced E is advisable in case of prolonged contact of FC with colored solutions in sedimentation tanks. Optimization of the total cleaning processes was carried out by deriving third-order regression equations "En – time" with an expanded range of optimal values of the process parameters. Conclusions. The purification efficiency and activity of individual FCs vary depending on the type of dye and the ferrite composition. FCs are more efficient in the purification of solutions from MV and MB than from CR. Optimal n varies within 700–1370. The regression equations are derived by the least squares method, which allow to optimize the process in terms of FC activity, efficiency and time of the process.


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Physical and inorganic chemistry