Preparation of Selective Adsorption Materials Based on AI203 and their Adsorption Properties for Sr2+

Abstract

Aiming at the selective adsorption treatment of 90Sr in radioactive waste liquid, we need to synthesize MnO2 and other inorganic ion exchanger with high selectivity for Sr2+ in the waste water, find the best material ratio, and prepare the raw material liquid. The feed liquid is blown into the hot dimethylsilicone oil by the self-made spherical particle preparation device and loaded on the Al2O3 matrix. The composite adsorbent with appearance and size similar to ion exchange resin was prepared. The physicochemical properties of the composite adsorbent were characterized by SEM,FT-IR and XRD.Different concentrations of strontium ion solution were prepared to study the change of adsorption capacity of Sr2+ at different time. The effects of pH on the adsorption properties of the adsorption properties under the influence of different initial concentrations and different coexisting ions were studied. According to the experimental data, the pseudo first order and quasi second order kinetic first order and quasi second order kinetic equations were used to fit the adsorption process. Two typical adsorption isotherm models, Langmuir and Freundlich models, were used to describe the adsorption process of Sr2+ by composite adsorbents.