Світлана Василівна Горобець

Purification of aqeous media by magnetically operated saponite sorbents

Composite magnetically operated sorbents based on saponite and magnetite (containing from 3 to 10 % wt.) were synthesized, and their phase and chemical composition was revealed. Their adsorption properties with respect to the dyes were investigated and it is shown that magnetically operated sorbents have a high sorption capacity (maximum sorption capacity qt by malachite green reaches 324,50 mg/g), which is significantly higher than in their separate phases - native saponite (105.71 mg/g) and magnetite (36.71 mg/g). The calculated parameters of the equation of the Langmuir adsorption isotherm indicate that sorbent shows greater selectivity with respect to the cationic type dyes. It was found that sorption of dyes on magnetically operated sorbents proceeded at a higher rate compared to saponin. When removing spent sorbents from water by magnetic separation, it was revealed that effective removal of magnetically operated sorbents from the working medium is possible with nozzles in the form of nickel-plated steel grids. It is shown that using magnetically operated sorbents and high-gradient magnetic separators allows to purify working media from dyes with high efficiency, up to 90-96%, therefore, using magnetic separators with high-gradient magnetic nozzles in the form of nickel-plated grids with desired technological parameters of magnetic separation process that take into account the magnetic properties of a particular sorbent type is recommended.