сорбция

Sorptive properties of a natural mineral glauconite towards methylene blue were studied and a composite of both substances was obtained. Antibacterial activity of the composite has been assessed against Staphylococcus aureus FDA 209P. An enriched fraction of natural glauconite was obtained by method of magnetic separation. Surface morphology of the glauconite was examined with scanning electron microscopy. The elemental composition was investigated using energy-dispersive microanalysis and roentgen fluorimetry, the texture – using Brunauer–Emmett–Teller analysis.

Fe3O4 nanoparticles coated with humic acids isolated from chernozem, sapropel, peat and brown coal were obtained using hydrothermal synthesis. The properties of the obtained sorbents were carried out using IR spectroscopy, SEM and TEM, whereas saturation magnetization was established using a vibration magnetometer. The maximum content of nitrogen-containing groups was found in humic acids obtained from sapropel, while the minimum amount was found in brown coal. The sorption properties of these polymers were checked among 12 different phenols.

The sorption properties of glauconite from Beloozersk deposits (Saratov region) for 4-nitrophenol (4-NF) have been investigated. The effect of glauconite on pH and 4-nitrophenol structure in solution is estimated. It is shown that glauconite increases pH of aqueous environment to 8 and shifts the equilibrium towards the formation of aci-form 4-NF. The conditions of sorption 4-NF by glauconite are established: the sorption time 20 min, the mass of the sorbent (0.50–1.0) g.

Glauconite, a natural aluminosilicate, exhibits good sorption properties, is an affordable, cheap material, and has the prospect of being used in construction, ecology, medicine, cosmetology, animal husbandry, poultry farming, agriculture, etc. An urgent task is to study the sorption activity of glauconite in the Beloozersky deposit in the Saratov region in relation to biologically active substances for the creation of antimicrobial composites. The elemental composition and surface morphology of glauconite grains are determined.

The effective nanostructured sorbents based on natural bentonite modified with aluminum and iron (III) polyhydroxocations were obtained. The elemental composition of the obtained sorbents was studied. The specific surface area was determined for the studied samples. It was shown that modified sorbents based on natural bentonite were nanostructured objects. IR spectroscopy showed that modification of natural bentonite led to the changes in its structural properties.