sorbent

The article analyzes the use of biochar in various industries and the national economy (as a sorbent, fuel, reducing agent in the metallurgical industry, a component of coal coke blends, biocomposites, modification of explosives, fertilizers, etc.) It is noted that the direction of use depends on the quality and characteristics of biochar (size, physical properties, chemical composition), which are determined by the nature of the raw material, its chemical composition and carbonization temperature.

From the perspective of converting waste into valuable products and reducing environmental pollution, the up-recycling of biomass waste into carbon-rich materials is attracting widespread attention. This literature review presents the possibilities of using the solid product of one-stage carbonization (char) of plant-origin waste biomass. Several applications are discussed, including the production of sorbents, energy storage materials, catalyst carriers, and agricultural applications.

Some new modified sorbents based on opoka from Astrakhan region were obtained. A comparative study of the sorption of cadmium ions on the surfaces of the sorbents was made. Also the static adsorption isotherm of substances from aqueous solutions was studied. The change of enthalpy, isobaric-isothermal potential and entropy of sorption and kinetics of cadmium ions sorption from water solutions were calculated. The results of the study can be used for the water purification from cadmium ions

The research determines the efficiency of the use of activated carbon in the process of water purification from heavy-metal ions for technological purposes in the food industry. Comparative studies of the use of sorbents of various types of activated carbon have been carried out. The study determines the factors that influence the efficiency of drinking water purification from heavy metal ions through activated carbon. It also proves the highest efficiency of oxidized form of activated carbon

Approach of obtaining molded composites on the basis of the mixtures of powders of nano-dispersed polyethylene, cellulose and ultra-dispersed carbonic materials has been developed. Тhese materials possess the assigned sorption properties and the physic-mechanical characteristics. Тhey are suitable for the usage in the process of cleaning and separation of gas mixtures.