HUMIC SUBSTANCES AND VISCOSITY OF SOIL PASTES

G. N. Fedotov; Федотов Г. Н.; S. A. Shoba; Шоба С. А.; D. A. Ushkova; Ушкова Д. А.; I. V. Gorepekin; Горепекин И. В.; O. A. Salimgareeva; Салимгареева О. А.; D. I. Potapov; Потапов Д. И.

doi:10.31857/S2686739723600285

HUMIC SUBSTANCES AND VISCOSITY OF SOIL PASTES

作者: Fedotov G.N.¹, Shoba S.A.¹, Ushkova D.A.¹, Gorepekin I.V.¹, Salimgareeva O.A.¹, Potapov D.I.¹
隶属关系:
1. Lomonosov Moscow State University
期: 卷 511, 编号 1 (2023)
页面: 119-123
栏目: GEOGRAPHY
##submission.dateSubmitted##: 14.10.2023
##submission.datePublished##: 01.07.2023
URL: https://bakhtiniada.ru/2686-7397/article/view/135820
DOI: https://doi.org/10.31857/S2686739723600285
EDN: https://elibrary.ru/RXRQHN
ID: 135820

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详细

In the work, the influence of water content in soil pastes on their viscosity was studied by the method of vibrational viscometry and changes in viscosity were explained from the standpoint of the structural organization of humic substances (HS) of soils. It was found that the viscosity of pastes prepared from sod-podzolic soil, with a decrease in their water content below 36%, increases to values of 4000–4200 MPa sec, and then practically does not change. This contradicted the existing ideas about the viscosity of suspensions, which should continuously increase with a decrease in the water content in them. This phenomenon was explained from the standpoint of the presence in the soil paste another component in addition to water and soil particles (aggregates and microaggregates) – supramolecular formations (SF) from soil HS, which can separate from soil gels and pass into a dispersion medium. According to the literature data, SF of HS exist in soils in the form of fractal clusters (F-clusters) consisting of particles-molecules. Due to the high stability of F-clusters, it is possible to assume that soil particles sliding along F-clusters in pastes, and a change in the thickness of the F-cluster layer through which sliding occurs may not significantly influence the viscosity of soil pastes. The data obtained during the study of the viscosity of soil pastes confirm the importance of F-clusters in the occurrence of soil properties.

关键词

soil gels, supramolecular formations of humic substances, fractal clusters (F-clusters) of particles-molecules of humic substances, viscometry of soil pastes, mechanical effect on pastes, water content in pastes, electron microscopy of F-clusters from soil pastes

参考

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