Abstract
The colloid-chemical properties of humic acids (HAs) were studied depending on the mechanochemicalmodification of their structure. An increase in the amount of acidic ionogenic groups and hydrophilicfragments in the composition of modified HAs facilitated a decrease in the excess energy of surfacemolecules. In an alkaline solution, two types of colloids characterized by a decrease in the energy of adsorption and the constant of adsorption equilibrium were formed as the concentration of HAs was increased.
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