Study on Removal of Sr in Solution with High Salt through Hydrolysis Reaction of Titanium Sulfate

The hydrolysis reaction of titanium sulfate and its adsorption ability for Sr²⁺ in solution with high salt were studied. Firstly, the adsorption of hydrolyzate for Sr²⁺ was investigated by ICP-MS. Secondly, the morphology and structure of hydrolyzate were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Finally, this technology was applied to the radioactive engineering test, and the test was run continually for 105 hours with 100 L/h of wastewater treatment. The results show that the hydrolyzate displays a significantly enhanced adsorption for Sr²⁺, and the adsorption ability strongly depends on the pH value of the solution with high salt. When the pH is 13, the adsorption ability of hydrolyzate for Sr²⁺ is maximum and it could reach up to 99.4%. The adsorption capacity of titanium sulfate for Sr²⁺ is 1.67 mmol/g. And the effect of reaction time on the adsorption rate was also studied, which proves that the adsorption for Sr²⁺ is done quickly. The radioactive engineering test verifies the feasibility of the process, the decontamination factor (DF) for ⁹⁰Sr could reach up to 215.