Tolstopalova N.M.

Study of hard water pre-treatment methods for membrane purification

This paper describes hard water pre-treatment and mineralization for subsequent water conditioning, using membrane methods. Furthermore, we show that application of ion exchange water softening at its preliminary preparation stage is appropriate on the condition that water hardness is less than 20meq/dm3. Through experiments performed, we prove that the antiscalants usage is efficient for water pre-treatment with a high level of noncarbonated hardness.

An Effective Reagent for Perufication of Flow Waters

In this paper, we make the comparative analysis of efficiency of flow waters perufication by coagulants on the basis of aluminium sulfate - industrial standard (Al2(SO4)318H2O) as well as a novel coagulant, synthesized by our technology. The efficiency of coagulants action is tested on the models and real standards of flow waters in the processes of perufication from lees, dyes, some ions of heavy metals. We also set the limits of рН efficient work of the synthesized standard.

The solvent sublation of iron ions from low concentration solutions

This study investigates the regularities of solvent sublation of iron ions from the low concentration water solution (CFe3+ = 10 mg/L). We determine optimal conditions of this process (the pH, the molar ratio of Fe3+: SAC, where SAC is the surface-active compound, the process duration, the temperature, the speed of gas flow). Relying on the ion association theory, we propose the mechanism of solvent sublation

The regularities of the flotoextraction process during the wastewater cleaning from the ions of heavy metals

Using the salts of unsaturated acids as surfactant, isoamyl alcohol and octan as an organic phase, we investigate the flotoextraction of heavy metals’ ions on the sample of nickel(II) ions. Moreover, we determine the optimum conditions for the process.

The study of non-isothermal kinetics of the process of kaolin sulphatization furnacing

This study considers the non-isothermal kinetics of kaolin sulphatization process with obtaining the crude aluminium sulphate as a main product. Using the methods of non-isothermal kinetics ensures obtaining the principal kinetic constants of the process in the temperature interval 50–235 °С within the scope of one experiment. Moreover, we demonstrate that the sulphatization process proceeds in several stages and we calculate the kinetic parameters for every single stage. Through experiments performed, we obtain the kinetic equation of the process speed.