Preparation of TiO2–SiO2 mixed gel spheres for strontium adsorption

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

“…Although there are other sorbents showing higher adsorption capacity towards strontium in the literature [8,10,[18][19][20][21], the prepared ZrO 2 -TiO 2 sorbent seems to be advantageous with easy preparation by the sol-gel process, spherical shape allowing to be used in column applications, chemical, mechanical and thermal resistance.…”

“…emerged as an increasingly important replacement or complement for conventional organic ion-exchange resins, particularly in liquid radioactive waste treatment and spent fuel reprocessing applications [3][4][5][6]. A variety of inorganic ion-exchangers and adsorbents have been reported: zeolites, ammonium molybdophosphate, magnetite, sodium titanate, titanium phosphate, titanium silicate, zirconium phosphate, hydrated alumina, silica, bentonites, mordenite, hydrous titanium oxide, mixed oxide of titania-silica, zirconium oxide and others [7][8][9][10][11][12]. Inorganic ion exchangers often have the advantage a much greater selectivity than organic resins for certain radiologically important species, such as the fission products 137 Cs and 90 Sr, which have relatively long half-life of approximately 30 years.…”

Preparation of amidoximated polymer composite based on CMK-3 for selective separation of uranium from aqueous solutions

“…The positive value of DH 0 (32.21, 65.36 kJ/mol) showed that the sorption reactions were endothermic [49]. The positive values of DS 0 reflected the randomness and disorder increased at the solid-liquid interface during the sorption of U(VI) on the CMK-3 and AO/CMK-3.…”

Sorption Properties of a Bentonite Based Material for Removal of Uranium from Alum Shale Leachate

“…The most interesting are fibrous filled sorbents, ferrocyanides of transition metals and titanium compounds. They have been successfully used for radionuclide separation [5][6][7][8][9]. Furthermore, it is possible to combine a pretreatment of the effluent either by a process sequence with pH adjustment, chemical precipitation, coagulation/flocculation and sorption of dissolved pollutants as a last step to increase the separation efficiency.…”