Ion exchangers in radioactive waste management. Part XI. Removal of barium and strontium ions from aqueous solutions by hydrous ferric oxide

Equilibrium isotherm modeling of cesium adsorption onto magnetic materials

“…The organic resins, selective towards cesium, are easily decomposed when exposed to highly ionizing radiation therefore application of inorganic ion exchangers is preferred. This is because they have several superior qualities required for the treatment of nuclear waste solutions, compared to organic resins, such as their higher thermal stability, resistance to ionizing radiation and good compatibility with the final waste forms [4][5][6]. The metal oxides are a group of inorganic ion exchangers that have been investigated extensively for application in nuclear waste treatment [7].…”

Preparation of TiO2–SiO2 mixed gel spheres for strontium adsorption

“…Adsorbents and/or ion exchangers used in the nuclear industry should also exhibit considerable resistance against ionizing radiation, possess high thermal and chemical stability. Inorganic ion exchangers, due to their resistance to heat and radiation, can be used for the high temperature separation of ionic components in radioactive wastes [4,5]. A large number of inorganic ion exchangers are known to have a great selectivity towards alkali and alkaline earth metal ions.…”

Cesium and strontium sorption by selected tropical and subtropical soils around nuclear facilities

“…Melnyk et al (1984) demonstrated that Sr had three kinds of uptake mechanisms: rapid, reversible ion exchange onto feldspars, slow sorption onto Fe oxyhydroxide coatings and slow/irreversible fixation to the ferromagnesian fraction of the sand. Furthermore, Mishra and Tiwary (1999) suggested that strontium was strongly sorbed on ferric hydroxides. Therefore, it is apparent that some strontium can be sorbed through complexation on surface of ferric hydroxides.…”