The Effect of Humic Acid Adsorption on the Coagulation Stability of Soil Suspensions

Humic acid adsorption and its effect on the coagulation stability of soil suspensions were studied. The humic acid (Aldrich Chemie) adsorption from its dilute aqueous solutions was examined for gray forest soil (Greyzemic Phaeozem (Loamic)), its components (clay fraction and parent rock), and cherno...

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Bibliographic Details
Published in:Eurasian soil science 2020, Vol.53 (1), p.62-72
Main Author: Kurochkina, G. N.
Format: Article
Language:English
Subjects:
Acidic soils
Acids
Adsorption
Aqueous solutions
Brightening
Clay
Coagulation
Earth and Environmental Science
Earth Sciences
Forest soils
Gels
Geotechnical Engineering & Applied Earth Sciences
Humic acid
Humic acids
Ion exchange
Soil
Soil Chemistry
Soil stability
Soil types
Soils
Solid phases
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Summary:Humic acid adsorption and its effect on the coagulation stability of soil suspensions were studied. The humic acid (Aldrich Chemie) adsorption from its dilute aqueous solutions was examined for gray forest soil (Greyzemic Phaeozem (Loamic)), its components (clay fraction and parent rock), and chernozem (Chernozem (Pachic)). Physicochemical methods proved that the sorption of humic acid in these objects is determined by the time of interaction, concentration of the acid, and the properties and concentration of the solid phase; it may be accompanied by ion exchange. The effect of humic acid adsorption on the coagulation stability of soil suspensions was judged from changes in the volume of gel-like precipitate released from the suspensions and the time required for the suspension brightening. It was shown that the stability of suspensions increases with an increase in the concentration of humic acid and depends on the type of soil.
ISSN:1064-2293
1556-195X
DOI:10.1134/S106422932001010X