Сорбційні властивості мідно-цинкового феритного композита

Problem. The relevance of the work is related to the solution of environmental problems arising from the increase in the amount of industrial wastewater contaminated with heavy metals. Goal. The aim of the work was to substantiate and determine the effectiveness of functional materials for water purification from heavy metal ions. Methodology. The possibility of obtaining copper-zinc ferrite materials from sulfate copper-zinc electrolyte by co-precipitation at the ratio of initial molar concentrations of components ∑(Cu2+ + Zn2+) : Fe3+ = 1 : 1. The main stages of obtaining copper-zinc ferrite materials are determined: mixing the spent sulphate copper-zinc solution with crystalline Fe(III) salt; formation of metal hydroxides; introduction of Na2SO3 reagent to form Fe2O3; bubbling with air oxygen; separation of the obtained ferrites from the eluate and their washing; determination of the composition of the obtained ferrites. Originality. The composition and physicochemical properties of the obtained ferrite composite were investigated. It is proved that the presence of ferrite phases in the form of spinel with the general formula FexZnyCuzO4 and a complex developed surface texture of the nan composite can characterize their effective sorption properties. The efficiency of sorption properties of ferrite composites has been proved, which determine the rapid kinetics and a sharp decrease in the concentration of Cu(II) ions over time at different mass ratios of ferrite composites and Cu(II) ions in solution (n) and sorption in a stationary mode. Practical value. Using curve approximation and CurveExpert Professional data analysis, a mathematical model was proposed that allows calculating the sorption exchange capacity, which characterises the degree of sorbent depletion, at any concentration of Cu(II) ions in solution.