Efficiency of aluminum-pillared montmorillonite on the removal of cesium and copper from aqueous solutions.

Preparation of zirconium-manganese oxide/polyacrylonitrile (Zr-Mn oxide/PAN) composite spheres and the investigation of Sr(II) sorption by experimental design

Removal of strontium(II) and cobalt(II) from acidic solution by manganese antimonate

Preparation of ZrO2 and ZrO2–TiO2 microspheres by the sol–gel method and an experimental design approach to their strontium adsorption behaviours

A manganese–zirconium mixed hydrous oxide with Mn to Zr mole ratio of 1:1 was prepared to study the sorption behavior and the removal of strontium from acidic radioactive waste solutions. Mixed hydrous oxide was identified and characterized by DTA/TGA, XRD, and surface analysis. The parameters affecting strontium adsorption, such as initial pH, contact time, initial metal ion concentration, temperature, adsorbent dose, and selectivity towards competing ions were investigated. Sorption data have been interpreted in terms of Freundlich and Langmuir equations. Thermodynamic parameters such as standard enthalpy (ΔH°), entropy (ΔS°), and free energy (ΔG°) were calculated from the slope and intercept of the plots of ln K D versus 1/T. The results indicated that the sorption of strontium onto manganese–zirconium mixed oxide is endothermic and spontaneous in nature.

Adsorption of Strontium from Acidic Waste Solution by Mn–Zr Mixed Hydrous Oxide Prepared by Co-Precipitation

Hydrous, amorphous MnO2–TiO2 composites demonstrating high affinity towards strontium and uranium at pH = 7 are obtained by means of template synthesis. The best distribution coefficients, as found using model solutions (K
 d
 Sr = 55000 mL/g and K
 d
 U
 = 40000 mL/g) and Chernobyl shelter water (K
 d
 Sr = 3800 mL/g), are gained for the samples containing equimolar amounts of manganese dioxide and titania precipitated using K+ as template cation.

Volodymyr V. Strelko

Papers

Amorphous MnO2 –TiO2 Composites as Sorbents for Sr2+ and UO22+