Removal of radionuclides and toxic metal ions from water with use of new highly effective sorbiting material

Abstract

The adsorption of radionuclides of strontium, rubidium, cesium, uranium and some toxic metal ions from water streams using flasks has been experimentally and theoretically studied. When studying the adsorption of a number of metal ions on them, it was found that in a wide range of pH many cations are durably adsorbed, and in some cases irreversible sorption is observed. Ammonium, potassium, rubidium, cesium, iron, cobalt, nickel, manganese (II), chromium (III), zinc, cadmium, lead, mercury, copper and rare earth ions are durably adsorbed. At the same time, sodium, aluminum, gallium, zirconium, and molybdenum (VI) ions are captured during adsorption from solutions. These ions can be desorbed not only by acidification of the eluting solution, but also by washing the sorbent with water. An analysis of the results obtained in the study of the adsorption of cations made it possible to draw an initial conclusion: those ions that contain vacant d or f orbitals form strong adsorption complexes with flasks. Flasks are used to extract potassium, rubidium, cesium, calcium, strontium and barium ions from water of varying degrees of salinity.