Use of Cellulose nanocrystals as Oil-Water Emulsion Stabiliser to Remove Crude Oil Pollution
F. V. LEGKIY1, YU. I. DRUZ2, E. V. UDORATINA2
1Pitirim Sorokin Syktyvkar State University, Syktyvkar, Russia
2Institute of Chemistry, Komi Science Center, Ural Branch, Russian Academy of Sciences, Syktyvkar, Russia
Keywords: nanocrystalline cellulose, crude oil, biodegradation, Pickering emulsions
Pages: 40-47
Abstract
The conditions for the formation of Pickering emulsions in the crude oil-water system were studied using cellulose nanocrystals with partially acylated surface as a stabilizer. Biodegradation of the obtained emulsions by natural microorganisms was investigated depending on the ratio of components in the emulsion. The formation of stable emulsions was evaluated depending on the nanocellulose concentration. At a low content of cellulose nanocrystals, the stability of the emulsion is achieved only with an increase in the concentration of the background electrolyte. Oil dispersing in water allows conserving the contact between the air and water phases, which promotes efficient biodegradation of oil due to an increase in the area of contact between oil microdrops and water. According to chromatographic analysis, the residual content of hydrocarbons in the emulsion is 20-25 % after incubation with an inoculant of microorganisms for 30 days. This method enhances the stability of oil dispersion, which promotes an increase in the rate of its biodegradation on various water surfaces.
DOI: 10.15372/CSD2023437
EDN: FETZDZ
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