sorption

The sorption of copper ions from a solution of copper(II) sulfate by the native form of natural clinoptilolite under mechanical stirring and under the action of ultrasonic radiation of different power and under different modes of process implementation (continuous and cyclic) was investigated. Based on the obtained results, it was concluded that ultrasonic vibrations significantly intensify the diffusion processes in the studied system.

The process of modification of natural clinoptilolite, pre-enriched by the main component, with manganese ions from nitrate solutions as precursors for obtaining manganese(IV) oxide was studied. The value of the sorption capacity of different fractions of clinoptilolite with respect to manganese ions at room temperature was determined, and the sorption rate and rate constants of this process were calculated. The influence of the concentration of manganese nitrate solution on the sorption capacity of certain fractions of zeolite was determined.

The influence of dispersion on the structural and sorption properties of the Transcarpathian clinoptilolite of the Sokyrnytske deposit was investigated by the method of complex thermal analysis. For a sample with a grain size of 0.14 mm, the effect of heat treatment on the ability to sorb water vapor was investigated. Thermal activation of clinoptilolite was carried out at temperatures of 200°C, 300°C, 400°C.The sorption capacity of natural and thermally activated clinoptilolite samples with relative to water vapor was investigated by thermal analysis.

Much of the sorbent used in the food industry is not re-used because it is difficult to regenerate and expensive. Also, the reuse of used sorbents involves their biological cleaning, which is due to the specificity of adsorbed materials. As a result, they are often stored off-site or disposed of in landfills, usually without authorization.  It is more promising to use such sorbents in waste water treatment, especially in the same food industry and in other industries where wastewater contains bioorganic substances.

The lyophilic properties of pyrocarbon, obtained by pyrolysis of worn automobile tires, in relation to oil, gasoline, benzene, hexane, water, and water-oil and water-gasoline emulsions were studied. The research was carried out by the method of a lying drop on the surface formed by pyrocarbon particles of different dispersion, by determining the contact angle of wetting. The value of this angle was determined by analyzing images obtained photographically. It was established that organic substances and water have a significant contrast in terms of the wetting of pyrocarbon.

Phenomenon of the long-range effect of poly(methacrylic acid) hydrogel  poly(4-vinylpyridine) hydrogel (gPMAAgP4VP intergel system) оn erbium ions sorption was studied. It was established that the structure of the basic hydrogel had a significant impact on the self-organization of the PMAA hydrogel. The mutual activation of hydrogels was investigated in an aqueous medium. Dependencies of swelling coefficient, specific electric conductivity and pH of aqueous solutions were determined.

Modern hydrogel healing therapies for damaged human skin, must perform a number of functions which are inherent for the skin: 1) preservation of thermal and water balance; 2) ensuring of oxygen penetration; 3) providing transportation of substances necessary for the functioning of the organism; 4) protection from mechanical damage. When using hydrogel coatings on damaged areas of the skin, they must perform, an additional function - prolonged delivery to the wound of therapeutic agents of various nature.