DOI 000000

UDC 628.196

Romanovskii Valentin, Gorelaia Olesia

Sorbent for oily wastewater treatment based on the wastes of de-ironing plants

Summary

The results of studying the properties of a sorbent obtained by the synthesis of nanosized iron oxides from the sludge generated during purification of wash water of de-ironing filters are presented. The method of exothermic combustion in solutions was chosen for the synthesis. Citric acid and hexamethylenetetramine were used as reducing agents in a stoichiometric ratio according to the reaction equation. X-ray phase analysis of the obtained samples showed the predominant presence of a magnetite phase and, at temperatures above 600°C, an additional hematite phase. The total static exchange capacity and specific surface area of the synthesized sorbent samples (up to 186.6 m²/g) were determined from the sorption of methylene blue dye. The sorbent capacity of the materials obtained (up to 3.1 g/g) is not inferior to the existing sorbents of oil products. Obtaining magnetic oil sorbents is possible eliminating the use of expensive technologies but with the simultaneous use of waste from de-ironing plants which will provide for reducing the negative anthropogenic impact on the environment and obtaining an economic effect at least by reducing the cost of production.

Key words

oil products , wastewater treatment , filter bed , sorbent , exothermic combustion in solutions , deironing plant sludge

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