Dynamics of weight loss of dolomite dropouts at different stages of dissolution in Albic Retisol

Abstract

In a laboratory experiment in 2020, the dynamics of the decrease in mass of large particles of dolomite dropouts in acidic Albic Retisol was established. Dolomite dropouts were collected from the landfill of a road construction factory. The results of the laboratory experiment showed that after 114 days of composting, the loss of dolomite mass ranged from 8.7 to 34.2 % of its initial content. The loss of mass of particles during composting from 114 to 224 days slowed down and fluctuated, depending on the variant, from 2.2 to 5.1 % of the initial mass of dolomite. The mechanism of weathering was considered and the factors enhancing the rate of dissolution of dolomite dropouts in the soil were revealed. Linear empirical dependencies of the rate of dissolution of dolomite in soil at different stages of the experiment were developed. Clustering of the developed models was carried out according to the absolute values ​​of the rate of decrease in the mass of particles in the vessels. When selecting the dose of application of large particles of dolomite for reclamation of acidic soils and duration of their action, it is recommended to take into account the duration of time the dolomite spent in the landfill.