The paper describes the issues associated with waste generated during steel production and processing, in particular the dust from electric arc furnaces (EAF). An effective solution for the disposal of such waste is its involvement in processing to obtain valuable products. This paper studies the physical and chemical properties of EAF dust produced during the smelting of metallized pellets and captured by the dust and gas cleaning system of the steel-smelting shop at the Oskol Electrometallurgical Combine, Belgorod Region. The results obtained in the study of the chemical and disperse compositions of dust, the microstructure of the surface made it possible to propose the use of dust as a raw material for coagulant production. The conditions of acid-thermal treatment of dust are determined, contributing to the partial dissolution of iron (II), (III), and aluminium compounds, which ensure the coagulation processes during wastewater treatment. Model solutions show high efficiency (> 95 %) of water treatment from heavy metal ions by modified EAF dust.

The literature data on the crushed walnut shells usageas a sorption material for metal ions, dyes and some organic compounds removal from aqueous media are summarized. Trees of the Juglans regia species are widespread in Russia; their shells are natural annually replenished material that is of industrial importance and can be used as sorption material for the extraction of many pollutants from aquatic environments. The paper gives a characteristic of the walnut shell, shows the indicators of the main substances that make up the shell (cellulose, lignin, hemicellululose), indicates the approximate specific surface area for BET and the content of functional groups. The results of studies of the adsorption of metal ions and and some dyes adsorption by walnut shellsare considered. The values of sorption indices for the studied pollutants are given. It is shown that it is possible to increase the sorption characteristics by chemical modification of the Juglans regia shell. It is determined that sorption isotherms in most cases are more fully described by the Langmuir model, and the process kinetics in all cases obeys the pseudo-second order model.

-While studying, a new nanocomposite carbon-bearing sorbent (TMCO) has been obtained as a result of thermal modification of sugar industry wastecarbonatation sludge.TMCO is a combination of carbonate basis covered by coal nanoparticles. The nanostructured layer from the amorphous carbon is penetrated by a lot of voids and canals, 50 nanometers or less in size, which are active adsorption centers. Experimental studies of wastewater sorption purification with copper and nickel ions, sodium lauryl sulfate, dairy milk processing industry components, oil products, dyes have been conducted. Practical significance of the new sorbent has been confirmed by tests on the factory floor of different enterprises. A complex mechanism of TMCO adsorption action with high wastewater purification has been established that allows recommending the nanocomposite as an effective sorbent to treat wastewater of different chemical compositions.

The present article presents the research results concerning the possibilities to produce iron-containing coagulant for treatment rainwater. Steel production wastes were used to produce coagulant. A technological procedure producing coagulant and water treatment.

The article reflects the results of research on the influence of roast temperature of water treatment waste obtained from drinking water generation (at the water treatment plant in Nizhnekamsk, Republic of Tatarstan) for sorption characteristics for native and used oil products - oils 5W40, 15W40 and И-20А. The methods of instrumental and computational means of research are presented. Differential thermal analysis and differential scanning calorimetry of water treatment waste were performed. The graphs of the influence of roast temperature on the aqueous extract pH value, maximum oil capacity and water absorption were constructed. It was found that at high temperatures, the decomposition of organic compounds with formation of carbon black occurs. It increases the maximum oil capacity in dynamic and static conditions in water and water absorption. It is determined that the best adsorption indicators are achieved for a sample of water treatment waste subjected to heat treatment at 600 C.