ADSORPTION OF SURFACE-ACTIVE SUBSTANCES ON AIR BUBBLES AND THE INFLUENCE OF THEIR SIZES RELATIONSHIP ON THE PERFORMANCE OF BUBBLE-FILM EXTRACTION

Authors

  • Виктор Сергеевич Гевод Ukrainian State Chemical Technology University, Ukraine
  • Иван Александрович Борисов Ukrainian State Chemical Technology University, Ukraine
  • Анастасия Сергеевна Чернова Ukrainian State Chemical Technology University, Ukraine

DOI:

https://doi.org/10.24025/2306-4412.3.2019.178722

Keywords:

water, purification, adsorption, bubble-film extraction

Abstract

Bubble-film extraction as an improved form of bubbling flotation allows to reduce the concentration of surface-active impurities in water to the level of tenths of a milligram per liter. The use of a polydisperse stream of air bubbles during bubble-film extraction significantly accelerates the process of water purification, when the proportion of large and small air bubbles reaches a certain ratio in their mixed stream. The best case is when air bubbles of different sizes form an integrated structure inside the collecting funnel of the discharge channel of the bubble-film extractor. In the built-in structure, capillary waves accompanying the rupture of large bubbles in the upper part of the critical gasfilling zone inside the funnel of the bubble film extractor transmit their pulses to small-sized bubbles. These pulses overcome the electrostatic repulsion in the boundary menisci of the contacting bubbles and thereby initiate their fusion with the release of more adsorbed surface-active substances into that part of the discharge channel in the bubble-film extractor where a stream of flat liquid films of flotation concentrate appears. As a result, a significant increase in the rate of water purification from its surface-active pollution occurs.
The features of bubble-film extraction (enhanced bubble flotation) for water purification are considered from the standpoint of the equilibrium and dynamics of adsorption of surface-active admixtures of water (surfactants) on air bubbles with various sizes. It is shown, that within a certain ratio of dimensions and quantity of air bubbles in their stream transferring surfactants from the water bulk into the bubble-film extractor, the productivity of bubble-film extraction process increases many times. The reason consists in the collective fusion of big and small air bubbles in their embedded structure inside of the bubble-films extractor under the action of capillary waves appearing at the bursting of large bubbles.

Author Biographies

Виктор Сергеевич Гевод, Ukrainian State Chemical Technology University

professor

Иван Александрович Борисов, Ukrainian State Chemical Technology University

student

Анастасия Сергеевна Чернова, Ukrainian State Chemical Technology University

student

References

E. A. Moelwyn-Hughes, Physical chemistry, Pergamon Press, 1961.

S. Guet, and G. Ooms, "Fluid mechanical aspects of the gas-lift technique", Annual. Rev. Fluid Mechanics, vol. 38, pp. 225-249, 2006.

V. S. Gevod et al., Surface-active and other contaminants in tap drinking water: properties, monitoring, reasons for accumulations and economical disposal, Dnepropetrovsk: Izd-vо UGHTU, 2002 [in Russian].

V. S. Gevod, Bubble-film extraction funda-mentals and application: handbook of surface and colloid chemistry, third edition, ed. K. S. Birdi, CRC Press, 2009, ch. 14, pp. 585-563.

V. S. Gevod, and I. L. Reshetnyak, Water purification devices: state-of-the art review, handbook of surface and colloid chemistry, fourth edition, ed. K. S. Birdi, CRC Press, 2015, ch. 8, pp. 481-542.

V. S. Gevod, and S. V. Fevod, Rotary wheel water treatment. Dnepropetrovsk: Grani, 2015 [in Russian].

V. S. Gevod, Hazardous pollution of tap water and its economical disposal. Lambert academic publishing, 2018 (ISBN 978-613-9-93414-0) [in Russian].

I. Cantat, S. Cohen-Addad, F. Elias, F. Graner, R. Hohler, O. Pitois, et al., Foams – structure and dynamics. Oxford University Press, 2013.

E. Ghabache, A. Antkowiak, C. Josserand, and T. Seon, "On the physics of fizziness: how bubble bursting controls droplets ejection", Physics of Fluids, 26, 121701, 2014. [Online]. Available: https://doi.org/10.1063/ 1.4902820.

J. Collins, Bursting bubble-slow motion. [Online]. Available: https://www. youtube.com/watch?v=dj10HOkkRC4

C. T. Nguyen, H. M. Gonnermann, Y. Chen, C. Huber, A. A. Maiorano, A. Gouldstone, and J. Dufek, "Film drainage and the life-time of bubbles", Geochemistry, Geophysics, Geosystems, 14 (9), pp. 3616-3631, 2013.

E. Ghabache, A. Antkowiak, C. Josserand, and T. Séon, "On the physics of fizziness: how bubble bursting controls droplets ejection", Physics of Fluids, 26, 121701, 2014.

C. Frederik Brasz, Casey T. Bartlett, Peter L. L. Walls, Elena G. Flynn, Yingxian Estella Yu, and James C. Bird, "Minimum size for the top jet drop from a bursting bubble", Physical Review Fluids, 3, 074001, 2018.

Laurent Duchemin, Stephane Popinet, Christophe Josserand, and Stephane Zaleskia, "Jet formation in bubbles bursting at a free surface", Physics of fluids, vol. 14, no. 9, pp. 3000-3008.

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Published

2019-10-23

How to Cite

Гевод, В. С., Борисов, И. А., & Чернова, А. С. (2019). ADSORPTION OF SURFACE-ACTIVE SUBSTANCES ON AIR BUBBLES AND THE INFLUENCE OF THEIR SIZES RELATIONSHIP ON THE PERFORMANCE OF BUBBLE-FILM EXTRACTION. Bulletin of Cherkasy State Technological University, (3), 118–126. https://doi.org/10.24025/2306-4412.3.2019.178722

Issue

No. 3 (2019)

Section

Chemical Technologies and Engineering, Environmental Safety

URN

http://vtn.chdtu.edu.uaurn:2306:44553.2019.178722

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