OPTIMISATION OF PHENOL PEROXIDE OXIDATION IN AQUEOUS SOLUTIONS IN THE PRESENCE OF MnFe2O4/CELLULOSE CATALYS

In this work, a mathematical planning approach to the optimisation of phenol peroxide oxidation in aqueous medium in the presence of MnFe2O4/CMC (CMC - hydrolysed microcrystalline cellulose) catalyst demonstrating high potential in the degradation of organic pollutants is studied. The use of the surface response method in optimising conditions is becoming more and more widespread due to: 1) the possibility to select the experimental optimisation conditions, 2) to determine the key factors determining the substrate conversion in the composition of conditions, 3) to optimise the number of experiments required to establish the optimal conditions in detail. In this work the synthesis and physicochemical studies of MnFe2O4/CMC sample for oxidative destruction of phenol in aqueous solutions were carried out. According to XRD data, the main phase of all samples was solid solution of MnFe2O4 substitution, specific surface area 147 m2∙g-1, specific pore volume 0.31 cm3∙g-1, average pore diameter 8.46 nm, pH(zero charge points) = 6.8, pH(suspensions)=7.3. The influence of the following parameters was studied: catalyst loading, reaction time, mixture temperature, and hydrogen peroxide concentration. The experiment parameters were varied in the range: hydrogen peroxide concentration in the reaction mixture from 0.2-2 mol∙l-1, reaction mixture temperature from 30-70 °C, catalyst loading 15-60 mg, reaction time, 20-180 min. A matrix of 24 main experiments and 6 for replicate data at the centre point was compiled. Conversion response surfaces from the given factors were plotted. It is shown that the influence of catalyst loading is an insignificant factor in process optimisation. The optimal conditions were obtained: hydrogen peroxide concentration 1.34 mol∙l-1, catalyst loading 15 mg, reaction temperature 60 °C, experiment time 180 min which were confirmed by the control experiment at threefold reproducibility. For citation: Gurovsky V.V., Perebeinos A.A., Mishchenko T.I., Tregubova K.V., Gromov N.V. Optimisation of phenol peroxide oxidation in aqueous solutions in the presence of MnFe2O4/cellulose catalys. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2025. V. 68. N 4. P. 100-109. DOI: 10.6060/ivkkt.20256804.7112.