FCT

Influence of Layered Nanofillers on Percolation Properties of Systems Based on Polypropylene Glycol and Carbon Nanotubes

By using impedance spectroscopy and optical microscopy methods the investigation of electrical properties of systems based on polypropylene glycol was conducted. It was shown that adding exfoliated layered fillers to the system shifts percolation threshold to low concentration of nanotubes.

Cleaning of Contaminated Waters Against U and Cr Compounds Using Pillared Al- and Al/Fe-Clays

In this paper a comprehensive study of adsorption properties of modified clay minerals with polyoxocomplexes (POM) of iron and aluminium with regard to removal of heavy metal ions from an aqueous medium was carried out. To determine changes in structure characteristics of the intercalated minerals have been used methods of X-ray diffraction, nitrogen adsorption with calculated specific surface area and pore size distribution, as well as adsorption of Chromium (VI) and Uranium (VI) ions from aqueous solutions at various pH values.

Reducing the concentration of Ca2+ Ions in Water Using Ultra- and Nanofiltration Ceramic Membranes

The main regularities of processes of water purification from Ca2+ ions using ultra- and nanofiltration ceramic membranes, in particular, the influence of the operating pressure, the duration of the experiments, the concentrations of Ca2+ ions in the original solution and its temperature to reduce the content of these ions in the filtrate were identified. The cleaning process of the model solution CaCl2 was carried out on an experimental installation of baromembranes using ultra-and nanofiltration tubular membranes of ceramic oxide (produced in Germany).

Regulation of Properties of Dispersions for Their Electrokinetic Treatment

For efficient processing of disperse systems based on the use of external electric fields the highest possible velocities of electrophoresis and electroosmosis for a particular system should be ensured. In case of dispersion, which includes a clay component, the main factor that allows adjusting of its electrokinetic properties is pH of equilibrium solution. In this regard, in present work the kinetics of changes in pH of the pore solution with the introduction of acidic and alkaline solutions (NaOH and HCl) is studied.

Influence of the Middle Magnetic Field on the Disperse Iron-Oxygen Mineral Phase Formation by Applyng the Rotation-Corrosion Dispergation Method

The purpose of this work was to investigate the process of the disperse iron-oxygen mineral phase formation by applying the rotation-corrosion dispergation method when the middle magnetic field affected the system. The rotation-corrosion dispergation method is based on the principle of iron (steel) electrode corrosion when its surface contacts either with air or dispersion medium. The constant magnetic field was influencing the system during the process of the phase formation. The magnetic field intensity was 0,6—1,9 kOe and remanent magnetic induction was 0,7—1,3 T.

Germanium-Silicate UTL Structure Zeolites with Extra Large Pores

The review contains literature data and the authors own research on methods for the synthesis of element-containing germanium-silicate zeolites with extra large pores.