Patterns of Aggregate Formation and Sedimentation of Fine Clay Particles

Sergii Kulinich; Andrii Shkop; Alona Bosiuk; Oleksii Shestopalov

doi:10.4028/p-q1cLXr

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 1027Patterns of Aggregate Formation and Sedimentation...

Patterns of Aggregate Formation and Sedimentation of Fine Clay Particles

Abstract:

The article deals with the peculiarities of the process of clay particle aggregation when coagulant and flocculant are introduced, as well as the regularity of formation and deposition of the formed flocs. The studies were carried out on a model suspension of bentonite clay with a concentration of 1-10 g/l. In the course of the study, the regularities of aggregate formation in the process of coagulation; the combined action of coagulants and flocculants, as well as the destruction of flocs under the influence of mechanical action were determined, and theoretical ideas were formed regarding the models of the process and the structure of the formed aggregates. It was found that the aggregation of fine particles has optimal ratios of both the concentration of the solid phase and the ratio of flocculant to the solid phase, at which the maximum rate of particle settling is observed. The optimum concentration for this type of clay, at which the maximum flocculation rate is observed, was 4-6 g/l. At other optimum concentrations, a slowdown in floc settling is observed due to the lack of formation of a spherical structure at low concentrations and compressed settling at higher concentrations. To intensify the sedimentation of loose flocs, it was proposed to introduce additional mineral lime particles with a particle size of 20-40 μm, which increase the weight of flocs and accelerate their sedimentation.

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Periodical:

Key Engineering Materials (Volume 1027)

Pages:

93-100

DOI:

https://doi.org/10.4028/p-q1cLXr

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Online since:

October 2025

Authors:

Sergii Kulinich, Andrii Shkop, Alona Bosiuk*, Oleksii Shestopalov

Keywords:

Aggregate Formation, Coagulation, Environmental Safety, Fine Particles, Flocculation, Sedimentation, Sustainable Development, Wastewater Treatment

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References

[1] A. A. Ayalew, A critical review on clay-based nanocomposite particles for application of wastewater treatment. Water Science and Technology. 85(10) (2022) 3002–3022.